- Heat Transfer Augmentation
- Gas Turbine Turbulent Heat Transfer
- Gas Turbine Deposition and Fouling
- Methods Development
- High Performance Parallel Computing
- Multiphase Fluid-Particulate Systems
- Bio-locomotion: Flapping Flight and Swimming
- Bio-fluid Mechanics: Cardiovascular
- Other Topics

#### People

- Aevelina Rahman
- Guoyang Liu (visiting scholar, 2018-2019)
- Nagendra Krishnamurthy (MS 2010; PhD 2014)
- Amit Amritkar (PhD 2013)
- Sai Srinivasan (PhD 2010)
- Mohammad Elyyan (PhD 2008)
- Shi-Ming Li (PhD 2007)
- Ali Rozati (PhD 2007)
- Wilfred Patrick (MS 2005)
- Dahai Guo (Post-doc, 2002-03)

#### Publications

**JOURNAL**

- Seibert, M. L., Blackwell, N. E. and Tafti, D. K., Effect of Pin Tip Dual Clearance on Flow and Heat Transfer at Low Reynolds Numbers, J. Heat Transfer 136(7), pp. 071901, 2014. doi: 10.1115/1.4027184.
- N. Krishnamurthy, Tafti, D. K., Viswanathan, A., Modeling of Soot Deposition in Wavy-Fin Exhaust Gas Recirculator Coolers, Int. J. Heat Mass Transfer 54, pp. 1671-1681, 2011.
- Selvarasu, N. K. C., Tafti, D. K. and Blackwell, N., Effect of Pin Density and Heat-Mass Transfer and Fluid Flow at low Reynolds numbers in mini-channels, ASME J. Heat Transfer, 132(6), April 2010.
- Elyyan, M. and Tafti, D. K., A Novel Split-Dimple Interrupted Fin Configuration for Heat Transfer Augmentation, Int. J. Heat Mass Transfer, 52, 1561-1572, 2009.
- Elyyan, M. and Tafti, D. K., Flow and Heat Transfer Characteristics of Dimpled Multilouvered Fins, J. Enhanced Heat Transfer, 16(1), 1-18, 2009.
- Li S.-M. and Tafti D.K., Near-Critical CO2 Liquid-Vapor Flow in a Sub-Microchannel. Part 2: Flow Regimes, J. Multiphase Flow 35(12), pp. 1130-1137, 2009
- Srinivas, S., Tafti, D. K., Rozati, A., Blackwell, N. E., Heat-Mass Transfer and Friction Characteristics of Profiled Pins at Low Reynolds Numbers, Numerical Heat Transfer, Part A, 54(2), pp. 130-150, 2008.
- Elyyan, M. A., Rozati, A. and Tafti, D. K., Investigation of Dimpled Fins for Heat Transfer Enhancement in Compact Heat Exchangers, Int. J. Heat Mass Transfer 51, pp. 2950-2966, 2008.
- Rozati, A. and Tafti, D. K., Blackwell, N. E., Effect of Pin Tip Clearance on Flow and Heat Transfer at Low Reynolds Numbers, ASME J. Heat Transfer 130, 071704(1-10), July 2008.
- Elyyan, M. A. and Tafti, D. K., LES Investigation of Flow and Heat Transfer in a Channel with Dimples and Protrusions, ASME J. Turbomachinery 130(4), 041016(1-9), 2008.
- Zhang, X. and Tafti D. K., Flow Efficiency in Multilouvered Fins, Int. J. Heat Mass Transfer, Vol. 46(10), pp. 1737-1750, 2003.
- Tafti D. K. and Cui, J., Fin-Tube Junction Effects on Flow and Heat Transfer in Flat Tube Corrugated Multilouvered Heat Exchangers, Int. J. Heat Mass Transfer, Vol. 46(11), pp. 2027-2038, 2003
- Cui, J. and Tafti D. K., Computations of Flow and Heat Transfer in a Three-Dimensional Multilouvered Geometry, Int. J. Heat Mass Transfer, Vol. 45(25), pp. 5007-5023, 2002.
- Tafti D. K., Zhang, X., Geometry Effects on Flow Transition in Multilouvered Fins – Onset, propagation, and Characteristic Frequencies, Int. J. Heat Mass Transfer, Vol. 44/22, pp. 4195-4210, 2001.
- Zhang, X. and Tafti D. K., Classification and Effects of Thermal Wakes in Multilouvered Fins, Int. J. Heat Mass Transfer, Vol. 44/13, pp. 2461-2473, 2001.
- Tafti D.K., Wang G. and Lin W., Flow Transition in a Multilouvered Fin Array, Int. J. Heat Mass Transfer, vol. 43, No. 6, pp. 901-919, 2000.
- DeJong N.C., Zhang L.W., Jacobi A.M., Balachandar S. and Tafti D.K., A Combined Experimental and Numerical Study of Flow and Heat Transfer in Offset Strip-Fin Heat Exchangers, J. HeatTransfer, Vol. 120, pp. 690-698, Aug. 1998.
- Zhang, L, Balachandar S. and Tafti D. K., Effects of Intrinsic Three Dimensionality on Heat Transfer and Friction Loss in a Periodic Array of Parallel Plates, Numerical Heat Transfer, Part A, 31, pp. 327-353, 1997.
- Zhang, L., Balachandar S., Tafti D. K. and Najjar, F. Heat Transfer Enhancement Mechanisms in InLine and Staggered Parallel Plate Fin Heat Exchangers, Int. J. of Heat Mass Transfer, vol. 40, No. 10, pp. 2307-2325, 1997.
- Zhang, L., Tafti D. K., Najjar, F., and Balachandar S., Computations of Flow and Heat Transfer in Parallel-Plate Fin Heat Exchangers on the CM-5; Effects of Flow Unsteadiness and Three-Dimensionality, Int. J. of Heat Mass Transfer, vol. 40, No. 6, pp. 1325-1341, 1997.

**CONFERENCE**

- Amritkar, A. and Tafti D. K., Relative Performance of some Novel Heat Transfer Augmentation Surfaces,
__Proceedings of the 20th National and 9th International ISHMT-ASME Heat and Mass Transfer Conference__, January 4-6, 2010, Mumbai, India. - Selvarasu, N. K. C. and Tafti, D. K., Blackwell, N., Optimization of Pin Fin Density at Low Reynolds Numbers in Minichannels,
__Seventh International Conference on Enhanced, Compact and Ultra-Compact Heat Exchangers: From Microscale Phenomena to Industrial Applications__, Costa Rica, Sep. 2009. - Krishnamurthy, N., Tafti D. K., Viswanathan, A. K., Modeling of Air-Side Fouling in Exhaust Gas Recirculators – Turbulent Channel Flow,
__Seventh International Conference on Enhanced, Compact and Ultra-Compact Heat Exchangers: From Microscale Phenomena to Industrial Applications__, Costa Rica, Sep. 2009. - Elyyan, M. and Tafti, D. K., Investigation of a Split Dimple Fin Geometry for Heat Transfer Augmentation, Paper No. 56117,
__2008 ASME Summer Heat Transfer Conference__, Aug. 10-14, Jacksonville, Florida. - Elyyan, M., Tafti D. K., Flow and Heat Transfer Characteristics of Dimpled Multilouvered Fins, Paper No: US-25,
__19th National & 8th ISHMT-ASME Heat and Mass Transfer Conference__, JNTU Hyderabad, India, January 3 – 5, 2008. - Rozati, A., Tafti, D.K., Blackwell, N.E., Thermal Performance of Pin Fins at Low Reynolds Numbers in Mini-micro Channels, Proceedings of HT2007, 2007
__ASME-JSME Thermal Engineering Summer Heat Transfer Conference__, July 8-12, 2007, Vancouver, British Columbia, Canada, ASME paper No. HT2007-32158, 2007. - Elyyan, M. A. and Tafti, D. K., LES Investigation of Flow and Heat Transfer in a Channel with Dimples and Protrusions”. ASME Paper No. GT2007-27811, Proceedings
__ASME Turbo Expo 2007: Power for Land, Sea and Air__, May 14-17, 2007, Montreal, Canada - Elyyan, D. K. Tafti, Flow Structure in Channels with dimples and protrusions at high Reynolds numbers,
__ASME Joint US-European Fluids Engineering Summer Meeting__, July 17-20, 2006, Miami, Florida, USA. - Tafti D. K., Computational Insights into Air-Side Flow and Heat Transfer in Compact Heat Exchangers, HT2005-72846, Proceedings of HT2005,
__2005 ASME Summer Heat Transfer Conference__, July 17-22, 2005, San Francisco, California, USA. - Patrick, W. and Tafti D. K. Computations of Flow Structure and Heat Transfer in a Dimpled Channel at Low to Moderate Reynolds number, HT-FED2004-56171, 2004 ASME Heat Transfer/Fluids Engineering Summer Conference, July 11-15, Charlotte.
- Guo, D. H. and Tafti, D. K., Effect of Inlet Flow Angle on Performance of Multilouvered Fin Heat Exchangers, Paper No. IMECE2003-41225,
__2003 ASME International Mechanical Engineering Congress and R&D EXPO__, Washington, D. C., USA, November 15 -21, 2003. - Guo, D. H. and Tafti D. K., Effect of Louver Angle in Multilouvered Fins at Low Reynolds Numbers, Paper No. HTD2003-40035, Proceedings of HTD2003:
__ASME Summer Heat Transfer Conference__, July 21-23, Las Vegas, Nevada, 2003. - Tafti D. K. and Cui, J., Advances in the Computation of Air-side Heat Transfer in Compact Heat Exchangers, Forum on Parallel Computing in Heat Transfer, Proceedings of
__2002 ASME International Mechanical Engineering Congress and Exposition__, Nov. 17-22, 2002, New Orleans, Louisiana. - Zhang, X. and Tafti, D. K., Effect of Fin Thickness on Flow and Heat Transfer in Multilouvered Fins, Proceedings of
__2002 ASME International Mechanical Engineering Congress and Exposition__, Nov. 17-22, 2002, New Orleans, Louisiana. - Tafti D. K., Zhang, X., Huang, W. and Wang, G., Large-Eddy Simulations of Flow and Heat transfer in Complex Three-Dimensional Multilouvered Fins,
__2000 ASME Fluids Engineering Division Summer Meeting__, FEDSM2000-11325, FED Vol. 251, June 11-15, 2000, Boston Massachusetts. - Zhang X. and Tafti D. K., Effect of Fin Pitch on Flow and Heat Transfer in Multilouvered Fins,
__4__, Pune, India, 12-15 January 2000.^{th}ISHMT/ASME Heat and Mass Transfer Conference - Tafti D. K. and Zhang, L, A Time-Dependent Calculation Procedure for Flow and Heat Transfer in a Periodic Array of Louvered Fins, Proceedings of the
__Third ISHMT-ASME Heat and Mass Transfer Conference__, IIT- Kanpur, paper no. HMT-97-097, pp. 721-728, Dec. 27-31, 1997. - Zhang, L., Balachandar, S., Najjar, F. M. and Tafti, D. K., A Numerical Study of Heat Transfer Mechanisms in Parallel-Plate Fin Heat Exchangers,
__International Conference on Advances in Mechanical Engineering__, Bangalore, India, December 1995.

#### People

- Shreekesh K. (IIT-Madras)
- Tae Kyung Oh (MS 2019)
- Xiaoming Tan (visiting scholar, 2016-17)
- Cody Dowd (MS 2016)
- Long He (MS 2014)
- Kevin Song (MS 2013)
- Vivek Kumar (2013)
- Sunil Patil (PhD 2011)
- Mohammad Elyyan (PhD 2008)
- Ali Rozati (PhD 2007)
- Aroon Viswanathan (PhD 2006)
- Evan Sewall (PhD 2005)
- Samer Abdel-Wahab (MS 2003)

#### Publications

**JOURNAL**

- Tafti, D.; Dowd, C.; Tan, X. High Reynold Number LES of a Rotating Two-Pass Ribbed Duct.
*Aerospace*2018,*5*, 124. https://doi.org/10.3390/aerospace5040124 - Tafti D. K., He L, Nagendra K., “Large-eddy simulation for predicting turbulent heat transfer in gas turbines,” Invited paper, Phil. Trans. R. Soc. A 372: 20130322, 2014. http://dx.doi.org/10.1098/rsta.2013.0322
- Song, K. and Tafti, D. K., Wall Modeled Large-Eddy Simulations in Rotating Systems for Applications to Turbine Blade Internal Cooling, Int. J. of Advances in Engineering Sciences and App. Math. 4(3), pp. 193-201, September 2012.
- Patil, S. and Tafti, D. K., Large-Eddy Simulation with Zonal Near Wall Treatment of Flow and Heat Transfer in a Ribbed Duct for the Internal Cooling of Turbine Blades, J. Turbomachinery 135(3), pp. 131006(1-10), May 2013.
- Patil, S., Sedalor, T, Tafti, D. K., Ekkad, S., Study of Flow and Convective Heat Transfer in a Simulated Scaled up Low Emission Annular Combustor, ASME J. Thermal Science and Engineering Applications, Vol. 3(3), 2011.
- Elyyan, M.A., Tafti, D.K., Investigation of Coriolis Forces Effect of Flow Structure and Heat Transfer Distribution in a Rotating Dimpled Channel, ASME J. Turbomachinery 134(3), May 2012.
- Patil, S., Abraham, S., Tafti, D. K., Ekkad, S., Kim, Y., Dutta, P., Moon, H.-K., Srinivasan, R., Experimental and Numerical Investigation of Convective Heat Transfer in a Gas Turbine Can Combustor, ASME J. Turbomachinery 133(1), 011028, Jan. 2011.
- Elyyan, M. and Tafti, D. K., Effect of Coriolis forces in a rotating channel with dimples and protrusions, Int. J. Heat Fluid Flow 31(1), pp. 1-18, 2010.
- Rozati, A., Tafti, D.K., Effect of Coolant-Mainstream Blowing Ratio on Leading Edge Film Cooling Flow and Heat Transfer – LES investigation, Int. J. Heat and Fluid Flow 29, pp. 857-873, 2008.
- Rozati, A., Tafti, D.K., Large-Eddy Simulation of Leading Edge Film Cooling, Int. J. Heat and Fluid Flow 29, pp. 1-17, 2008.
- Rozati, A., Tafti, D.K., Large Eddy Simulation of Leading Edge Film Cooling Part-II: Heat Transfer and Effect of Blowing Ratio, ASME J. Turbomachinery 130(4), 041015(1-9), 2008.
- Viswanathan, A.K., Tafti, D.K., Investigation of Detached Eddy Simulation in Capturing the Effects of Coriolis Forces and Centrifugal Buoyancy in Ribbed Ducts, ASME J. Heat Transfer, 129(7), pp. 778-789, July 2007.
- Viswanathan, A.K., Tafti, D.K., Capturing the Effects of Rotation in Sudden Expansion Ducts using Detached Eddy Simulation, AIAA J., 45(8), pp. 2100-2102, August 2007.
- Sewall, E.A., Tafti, D.K., Large Eddy Simulation of Flow and Heat Transfer in the Developing Flow Region of a Rotating Gas Turbine Blade Internal Cooling Duct with Coriolis and Buoyancy Forces, ASME J. Turbomachinery, 113(1), January, 2008.
- Sewall, E.A., Tafti, D.K., An Unsteady Variable Property Algorithm for Flows with Large Temperature Variations, Computers and Fluids 37, pp. 51-63, 2008.
- Viswanathan, A.K., Tafti, D.K., A comparative study of DES and URANS for Flow prediction in a Two-pass Internal Cooling Duct, ASME J. Fluids Engineering, 128(6), pp. 1336-1345, Nov. 2006.
- Viswanathan, A.K., Tafti, D.K., Detached Eddy Simulation of Flow and Heat Transfer in FullyDeveloped Rotating Internal Cooling Channel with Normal Ribs, Int. J. Heat and Fluid Flow 27(3), pp. 351-370,2006.
- Sewall, E.A., Tafti, D.K., Large Eddy Simulation of Flow and Heat Transfer in the 180º Bend Region of a Stationary Ribed Gas Turbine Blade Internal Cooling Duct, ASME J. Turbomachinery (128), pp.763-771,2006
- Viswanathan, A.K., Tafti, D.K., Detached Eddy Simulation of Turbulent Flow and Heat Transfer in a Two-Pass Internal Cooling Duct, Int. J. Heat and Fluid Flow 27(1), pp. 1-20, 2006.
- Sewall, E.A., Tafti, D.K., Thole, K.A., Graham, A., Experimental Validation of Large Eddy Simulations of Flow and Heat Transfer in a Stationary Ribbed Duct, Int. J. Heat and Fluid Flow 27 (2), pp. 243-258, 2006.
- Viswanathan A. and Tafti, D. K., Detached Eddy Simulation of Turbulent Flow and Heat Transfer in a Ribbed Duct, ASME J. Fluids Engineering 127(5), pp. 888-896, 2005.
- Tafti, D. K., Evaluating the Role of Subgrid Stress Modeling in a Ribbed Duct for the Internal Cooling of Turbine Blades, Int. J Heat and Fluid Flow 26(1), pp. 92-104, 2005.
- Abdel-Wahab, S. and Tafti, D. K., Large Eddy Simulations of Flow and Heat Transfer in a 90º Ribbed Duct with Rotation – Effect of Coriolis and Centrifugal Buoyancy Forces, J. Turbomachinery 126(4), pp. 627-636, 2004.
- Tafti, D. K. and Yavuzkurt, S., Prediction of Heat Transfer Characteristics for Discrete Hole Film Cooling – One Row of Injection Into a Turbulent Boundary Layer, Int. J. Turbo. and Jet Engines, Vol. 8, Nos. 3&4, pp. 235-265, 1991.
- Tafti, D. K. and Yavuzkurt, S., Prediction of Heat Transfer Characteristics of Discrete Hole Film Cooling for Turbine Blade Applications, Journal of Turbomachinery, Trans. of ASME, Vol. 112, (3), pp. 504-511, July 1990.

**CONFERENCE**

- K., Vengadesan, S. and Tafti, D.K., “Numerical Investigation of Flow in a Duct with Square Ribs and Forward Step Rib Mounted on walls,” Paper No. TFEC-2019-27977, 4th Thermal and Fluids Engineering Conference (TFEC), April 14–17, 2019, Las Vegas, NV, USA
- Oh T.-K., Tafti, D. K. and Nagendra, K., “Conjugate heat transfer analysis of a ribbed cooling passage for a fully developed flow using the immersed boundary method,” Paper No. GT2019-90397, Proceedings of the ASME Turbo Expo 2019: Turbomachinery Technical Conference & Exposition, June 17-21, 2019, Phoenix, Arizona, USA.
- Dowd, C. and Tafti, D. K., “LES of Rotating Two-Pass Ribbed Duct with Coriolis and Centrigugal Buoyancy Forces at Re=100,000,” Paper No. HT2016-7348, Proceedings of the ASME 2016 Summer Heat Transfer Conference, July 10-14, 2016, Washington, DC, USA.
- He, L. and Tafti, D. K., “Evaluating the Immersed Boundary Method in a ribbed duct for the internal cooling of turbine blades,” Proceedings of ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT2015-43953, June 15-19, 2015, Montreal, Canada.
- Gomez, D., Kumar, V., Ekkad, S., Tafti, D., Yong, K., Moon, H.X., Ram, S., Flow Field and Liner Heat Transfer for a Model Annular Combustor Equipped with Radial Swirlers, Proceedings of the 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, July 2014.
- Singh, S. and Tafti, D. K., Detailed Heat Transfer in a Two Pass Internal Cooling Duct with Rib Turbulators, ASME Summer Heat Transfer Conference, Puerto Rico, July 8-12, 2012.
- Song, K. and Tafti D. K., Wall Modeled large-eddy Simulations in Rotating Systems for Applications to Turbine Blade Internal Cooling, Paper No. ISHMT_USA_014, Proceedings of the 21st National & 10th ISHMT-ASME Heat and Mass Transfer Conference, December 27-30, 2011, IIT Madras, India.
- Patil, S. and Tafti D. K., Large Eddy Simulation with Zonal near Wall Treatment of Flow and Heat Transfer in a Ribbed Duct for the Internal Cooling of Turbine Blades, Paper No. GT2011-45749, ASME Turbo Expo, June 6-10, 2011, Vancouver, Canada.
- Patil, S. and Tafti D. K., Large-eddy Simulation of Flow and Convective Heat Transfer in a Gas Turbine Can Combustor with Synthetic Inlet Turbulence, Paper No. GT2011-46561, ASME Turbo Expo, June 6-10, 2011, Vancouver, Canada.
- Elyyan, M.A., Tafti, D.K., Investigation of Coriolis Forces Effect of Flow Structure and Heat Transfer Distribution in a Rotating Dimpled Channel, Proceedings of the ASME Turbo Expo 2010, Paper No.: GT2010-22657, June 14-18, Glasgow, UK.
- Cowan, J. B., Tafti, D.K., and Kohli, A., Investigation of Sand Particle Deposition and Erosion within a Short Pin Fin Array, Proceedings of the ASME Turbo Expo 2010, Paper No.: GT2010-22362, June 14-18, Glasgow, UK.
- Sedalor, T, Patil, S., Ekkad, S., Tafti, D. K., Kim, Y., Dutta, P., Moon, H.-K., Srinivasan, R., Heat Transfer and Flow Characteristics Study in a Low Emission Annular Combustor, Proceedings of the ASME Turbo Expo 2010, Paper No.: GT2010-22986, June 14-18, Glasgow, UK.
- Patil, S., Abraham, S., Tafti, D. K., Ekkad, S., Kim, Y., Dutta, P., Moon, H.-K., Srinivasan, R., Experimental and Numerical Investigation of Convective Heat Transfer in a Gas Turbine Can Combustor, Proceedings of
__ASME Turbo Expo 2009__, June. 8-12, Orlando, Florida. ASME Paper No. GT2009-59377. - Sreedharan, S.S., and Tafti, D.K., Effect of blowing ratio in the near stagnation region of a three-row leading edge film cooling geometry using large eddy simulations. Proceedings of
__ASME Turbo Expo 2009__, June. 8-12, Orlando, Florida. ASME Paper No. GT2009-59325. - Sreedharan, S.S., and Tafti, D.K., Large Eddy Simulations Of A Three-Row Leading Edge Film Cooling Geometry. Proceedings of
__ASME IMECE2008__, Nov. 2-6, Boston, Massachusetts. ASME Paper No. IMECE2008-67019. - Rozati, A., Tafti, D.K., Large Eddy Simulation of Leading Edge Film Cooling Part-I: Computational Domain and Effect of Coolant Inlet Condition. ASME Paper No. GT2007-27689, Proceedings
__ASME Turbo Expo 2007: Power for Land, Sea and Air__, May 14-17, 2007, Montreal, Canada - Rozati, A., Tafti, D.K., Large Eddy Simulation of Leading Edge Film Cooling Part-II: Heat Transfer and Effect of Blowing Ratio. ASME Paper No. GT2007-27690, Proceedings
__ASME Turbo Expo 2007: Power for Land, Sea and Air__, May 14-17, 2007, Montreal, Canada - Rozati, D. K. Tafti, Large-Eddy Simulations of Turbine Blade Leading Edge Film Cooling,
__ASME Joint US-European Fluids Engineering Summer Meeting__, July 17-20, 2006, Miami, Florida, USA. - Viswanathan, A. K. and Tafti D. K., Large Eddy Simulation of the fully developed flow and heat transfer in a rotating duct with 45° ribs, GT 2006-90229,
__ASME Turbo Expo 2006__, 8- 11 May 2006, Barcelona, Spain. - Viswanathan, A. K. and Tafti, D. K., A comparative study of DES and URANS in a Two-pass Internal Cooling Duct with Normal Ribs – IMECE2005-79288, 2005
__ASME International Mechanical Engineering Congress and Exposition,__November 5-11, 2005, Orlando, Florida. - Viswanathan, A.K., Tafti. D.K., Abdel-Wahab, S., Large Eddy Simulation of Flow and Heat Transfer in an Internal Coolingg Duct with High Blockage Ratio 45
^{o}staggered Ribs, GT 2005-68086, Proceedings of__ASME Turbo Expo 2005__, June 6-9, Reno-Tahoe,USA. - Viswanathan, A.K., Tafti. D.K., Large Eddy Simulation of Flow and Heat Transfer in a Ribbed Duct With Skewed Ribs of Rounded Cross-section, GT 2005-68117, Proceedings of
__ASME Turbo Expo 2005__, June 6-9, Reno-Tahoe,USA. - Viswanathan, A.K., Tafti. D.K., Deatched Eddy Simulation of Flow and Heat Transfer in a Stationary Internal Cooling Duct with Skewed Ribs,GT 2005-68118, Proceedings of
__ASME Turbo Expo 2005__, June 6-9, Reno-Tahoe, USA. - Sewall, E.A., Tafti, D.K., Large Eddy Simulation of Flow and Heat Transfer in the 180º Bend Region of a Stationary Ribed Gas Turbine Blade Internal Cooling Duct, Proceedings of the
__ASME Turbo Expo 2005__, Reno-Tahoe, Nevada, ASME Paper No. GT2005-68518. - Sewall, E.A., Tafti, D.K., Large Eddy Simulation of Flow and Heat Transfer in the Developing Flow Region of a Rotating Gas Turbine Blade Internal Cooling Duct with Coriolis and Buoyancy Forces, Proceedings of the
__ASME Turbo Expo 2005__, Reno-Tahoe, Nevada, ASME Paper No. GT2005-68519. - Viswanathan A. and Tafti, D. K., Detached Eddy Simulation of Turbulent Flow and Heat Transfer in a Duct, HT-FED2004-56152, 2004 ASME Heat Transfer/Fluids Engineering Summer Conference, July 11-15, Charlotte.
- Abdel-Wahab, S. and Tafti, D. K., Large Eddy Simulation of Flow and Heat Transfer in a Staggered 45º Ribbed Duct, GT2004-53800,
__ASME Turbo Expo: 2004__, Vienna, Austria. - Abdel-Wahab, S. and Tafti, K., Large Eddy Simulations of Flow and Heat Transfer in a 90º Ribbed Duct with Rotation – Effect of Coriolis Forces, GT2004-53796,
__ASME Turbo Expo: 2004__, Vienna, Austria. - Abdel-Wahab, S. and Tafti, K., Large Eddy Simulations of Flow and Heat Transfer in a 90º Ribbed Duct with Rotation – Effect of Coriolis and Centrifugal Buoyancy Forces, GT2004-53799,
__ASME Turbo Expo: 2004__, Vienna, Austria. - Sewall, E, and Tafti, D. K., Large Eddy Simulation of the Developing Region of a Stationary Ribbed Internal Turbine Blade Cooling Channel, GT2004-53832,
__ASME Turbo Expo: 2004__, Vienna, Austria. - Sewall, E, and Tafti, D. K., Large Eddy Simulation of the Developing Region of a Rotating Ribbed Internal Turbine Blade Cooling Channel, GT2004-53833,
__ASME Turbo Expo: 2004__, Vienna, Austria. - Tafti D. K., Large Eddy Simulations of Heat Transfer in A Ribbed Channel for Internal Cooling of Turbine Blades, Paper No. GT2003-38122, Proceedings of
__ASME/IGTI Turbo Expo__., Atlanta, Georgia, June 16-19, 2003. - Tafti, D. K. and Yavuzkurt, S., Prediction of Heat Transfer Characteristics of Discrete Hole Film Cooling for Turbine Blade Applications,
__34th International Gas Turbine and Aeroengine Congress and Exposition__*in Toronto*, Canada, June 4-8, 1989, ASME paper 89-GT-139. - Tafti, D. K. and Yavuzkurt, S., Prediction of Heat Transfer Characteristics for Discrete Hole Film Cooling – One Row of Injection Into a Turbulent Boundary Layer, HTD Vol. 103, pp. 45-52,
__ASME Winter Annual Meeting__, Chicago, Nov. 27-Dec. 2, 1988.

- Tafti, D.; Dowd, C.; Tan, X. High Reynold Number LES of a Rotating Two-Pass Ribbed Duct.

#### People

- Steven Paul (MS 2018)
- Cody Dowd (MS 2016)
- Kuahai Yu (visiting scholar, 2015-16)
- Sukhjinder Singh (PhD 2014)
- Jonathan Cowan (MS 2009)
- Sai Srinivasan (PhD 2010)

#### Publications

**JOURNAL**

- Yu, K. and Tafti, D. K. “Size and temperature dependent collision and deposition model for micron-sized sand particles”,
*Turbomachinery*141(3) 031001, January 2019. https://doi.org/10.1115/1.4042215. - Yu, K., Elghannay, H.A. and Tafti D.K., “An Impulse Based Model for Spherical Particle Collisions with Sliding and Rolling,”
*Powder Technology*319, September 2017, pp. 102-116 DOI: https://doi.org/10.1016/j.powtec.2017.06.049 - Yu, K. and Tafti D. K. “Impact model for micrometer-sized sand particles,” Powder Technology 294, June 2016, pp. 11-21. (doi:10.1016/j.powtec.2016.02.014)
- Singh, S. and Tafti, D. K. “Prediction of Sand Transport and Deposition in a Two-Pass Internal Cooling Duct,” ASME J. of For Gas Turbines and Power, July 2016, Vol. 138 (7), 072606:1-12. (doi:10.1115/1.4032340)
- Singh, S. and Tafti, D. K., “Particle deposition model for particulate flows at high temperatures in gas turbine components,” Int. J. Heat Fluid Flow 52, April 2015, pp. 72-83. (http://dx.doi.org/10.1016/j.ijheatfluidflow.2014.11.008).
- Singh, S. and Tafti, D. K., “Sand transport in a two pass internal cooling duct with rib turbulators,” Int. J. Heat and Fluid Flow 46 (2014) 158-167. (doi: 10.1016/j.ijheatfluidflow.2014.01.006)
- Shrinivas, S. S., and Tafti D. K., Effect of blowing ratio on early stage deposition of Syngas ash on a film cooled vane leading edge using large eddy simulations, ASME J. Turbomachinery 135(6),061005, Sep. 13, 2013. (doi: 10.1115/1.4025153)
- Shrinivas, S. S. and Tafti, D. K., Composition dependent model for the prediction of syngas ash deposition in turbine gas hotpath, Int. J. Heat Fluid Flow 32, pp. 201-211, 2011.
- Rozati, A., Tafti, D. K. and Sreedharan, S. S., Effect of Syngas Particle size on Deposition and Erosion of a Film Cooled Leading Edge, ASME J. Turbomachinery, 133(1), 011010, Jan. 2011
- Shah, A. and Tafti D. K., Transport of Particulates in an Internal Cooling Ribbed Duct, ASME J. Turbomachinery, 129(4), 816-825, October 2007.

**CONFERENCE**

- Paul, S., Tafti, D. K. and Yu K., “A Computational Framework for Deposit Formation and Growth,” Paper No. GT2019-90266, Proceedings of the ASME Turbo Expo 2019: Turbomachinery Technical Conference & Exposition, June 17-21, 2019, Phoenix, Arizona, USA.
- Dowd, C., Tafti D.K. and Yu, K. “Sand Transport and Deposition in Rotating Two-passed Ribbed Duct with Coriolis and Centrifugal Buoyancy Forces at Re=100,000,” Paper no. GT2017-63167, Proceedings of ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition GT2017, June 26-30, 2017, Charlotte, NC, USA.
- Yu, K. and Tafti D.K. “Size and Temperature Dependent Deposition Model of Micro-sized Sand Particles,” Paper no. GT2017-63792, Proceedings of ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition GT2017, June 26-30, 2017, Charlotte, NC, USA.
- Singh, S. and Tafti, D. K., “Prediction of Sand deposition in a Two-Pass Internal Cooling Duct,” Proceedings of ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT2015-44103, June 15-19, 2015, Montreal, Canada.
- Singh, S. and Tafti D. K., Predicting the coefficient of restitution for particle wall collisions in gas turbine components, Paper No. GT2013-095623, Proceedings of the ASME Turbo Expo 2013, June 3-7, 2013, San Antonio, Texas, USA.
- Singh, S., Reagle, C., Delimont, J., Tafti, D. K., Ng, W. and Ekkad, S., Sand Transport in a Two Pass Internal Cooling Duct with Rib Turbulators, ASME Summer Heat Transfer Conference, Puerto Rico, July 8-12, 2012.
- Sreedharan, S. S., Tafti, D. K., Composition Dependent Model for the Prediction of Syngas Ash Deposition With Application to a Leading Edge Turbine Vane, Proceedings of the ASME Turbo Expo 2010, Paper No.: GT2010-23655, June 14-18, Glasgow, UK.
- Sreedharan, S.S., and Tafti, D.K., Effect of blowing ratio on syngas flyash particle deposition on a three-row leading edge film cooling geometry using large eddy simulations. Proceedings of
__ASME Turbo Expo 2009__, June. 8-12, Orlando, Florida. ASME Paper No. GT2009-59326. - Rozati, A., Tafti, D. K., Shreedharan, S., Effects of Syngas Ash Particle size on Deposition and Erosion of a Film-Cooled Leading Edge, Paper No. 56155,
__2008 ASME Summer Heat Transfer Conference__, Aug. 10-14, Jacksonville, Florida. - Shah, D. K. Tafti, Transport of Particulates in a Rotating Internal Cooling Duct, FEDSM2006-98020,
__ASME Joint US-European Fluids Engineering Summer Meeting__, July 17-20, 2006, Miami, Florida, USA. - Shah, A. and Tafti D. K., Transport of Particulates in an Internal Cooling Ribbed Duct, GT 2006-91284,
__ASME Turbo Expo 2006__, 8- 11 May 2006, Barcelona, Spain.

- Yu, K. and Tafti, D. K. “Size and temperature dependent collision and deposition model for micron-sized sand particles”,

#### People

- Peter Windes
- Vivek Srinivasan (MS 2019)
- Husam El-Ghanney (PhD 2018)
- Steven Paul (MS 2018)
- Keyur Joshi (Post-doc, 2014-16)
- Kuahai Yu visiting scholar 2015-16)
- Sukhjinder Singh (PhD 2014)
- Deepu Dilip (MS 2014)
- Nagendra Krishnamurthy (PhD 2014)
- Kamal Viswanath (PhD 2013)
- Naresh Selvarasu (PhD 2013)
- Surya Deb (PhD 2013)
- Kevin Song (MS 2012)
- Sunil Patil (PhD 2011)
- Pradeep Gopalakrishnan (PhD 2008)
- Shi-Ming Li (PhD 2007)
- Guangchu Hu (Post-doc, 2002-03)

#### Publications

**JOURNAL**

- Nagendra, K. and Tafti, D. K., “A Sub-pore Model for Multi-Scale Reaction-Diffusion Problems in Porous Media,”
*J. Heat Mass Transfer*84, May 2015, pp. 463-474. (doi:10.1016/j.ijheatmasstransfer.2014.12.034) - Nagendra, K., Tafti, D. K., and Viswanath, K., A new approach for conjugate heat transfer problems using immersed boundary method for curvilinear grid based solvers, J. Comp. Physics Vol. 267, 15 June 2014, pp. 225-246. (doi: 10.1016/j.jcp.2014.02.045)
- Tafti, D. K., Large-Eddy Simulation for Turbulent Heat Transfer, J. Thermal Science Engineering Applications, Special Issue: 75th Anniversary Celebration of the Heat Transfer Division, Vol. 5, June 2013, pp. 021001-(1-13). (doi: 10.1115/1.4023955)
- Nagendra, K. and Tafti, D. K., Flows Through Reconstructed Porous Media Using Immersed Boundary Methods, ASME J. Fluids Engineering 136(4), April 01, 2014, 040908 (doi:10.1115/1.4026102)
- Patil, S. and Tafti, D. K., Large-Eddy Simulations of Flow and Convective Heat Transfer in a Gas Turbine Can Combustor with Synthetic Inlet Turbulence, ASME Journal of Engineering for Gas Turbines and Power 134, pp. 071503(1-9), July 2012.
- Patil S. and Tafti, D. K., A two-layer wall model for large-eddy simulations of flow over rough surfaces, AIAA J. 50(2), p. 454, 2012.
- Patil S. and Tafti, D. K., Wall modeled large eddy simulation of complex high Reynolds number flows with synthetic inlet turbulence, Int. J. Heat Fluid Flow 33(1), pp. 9-21, Feb. 2012.
- Gopalakrishnan, P. and Tafti, D. K., A Parallel Boundary Fitted Dynamic Mesh Solver for Applications to Flapping Flight, Computers and Fluids, 38(8), pp. 1592-1607, 2009.
- Li S.-M. and Tafti D.K., Near-Critical CO2 Liquid-Vapor Flow in a Sub-Microchannel. Part 1: Mean-Field Free-Energy D2Q9 Lattice Boltzmann method, J. Multiphase Flow 35(8), pp. 725-737, 2009.
- Sewall, E.A., Tafti, D.K., An Unsteady Variable Property Algorithm for Flows with Large Temperature Variations,
*Computers and Fluids*37, pp. 51-63, 2008. - Li, S-M., Tafti, D. K., A Mean Field Pressure Formulation for Liquid-Vapor Flows, ASME J. Fluids Engineering 129(7), pp. 894-901, 2007.
- D. L. Ma, D. K. Tafti, and R. D. Braatz. High resolution simulation of multidimensional crystallization. Special Issue in Honor of William R. Schowalter, Ind. Eng. Chem. Res., 41, pp. 6217-6223, 2002.
- D. L. Ma, D. Tafti, and R. D. Braatz. Compartmental modeling of multidimensional crystallization. Int. J. of Modern Physics B, 16, pp. 383-390, 2002.
- Tafti, D. K., Comparison of Some High-Order Formulations With a Second-Order Central-Difference Scheme For Time Integration Of The Incompressible Navier-Stokes Equations, Computers and Fluids, vol. 25, No. 7, pp. 647-665, 1996.
- Najjar, F. and Tafti D. K., Study of Discrete Test Filters and Finite Difference Approximations for the Dynamic Subgrid-Scale Stress Model, Physics of Fluids 8(4), pp. 1076-1088, April 1996.
- Tafti, D. K., Alternate Formulations for the Pressure Equation Laplacian on a Collocated Grid for Solving the Unsteady Incompressible Navier-Stokes Equations, J. of Comp. Physics 116, pp. 143-153, January 1995.
- Tafti D. K., Zhang L.W., and Wang, G. A Time-Dependent Calculation Procedure for Fully Developed and Developing Flow and Heat Transfer in Louvered Fin Geometries
*, Num. Heat Transfer A*, 35(3), pp.225-249, 1999.

**CONFERENCE**

- Yu, K. Tafti, D.K., Yang, X. and Xin S., “Heat transfer during impact of elastoplastic and cohesive particles,” Paper No. GT2019-91087, Proceedings of the ASME Turbo Expo 2019: Turbomachinery Technical Conference & Exposition, June 17-21, 2019, Phoenix, Arizona, USA.
- He Long, Joshi, K. and Tafti, D. K., “Study of Fluid Structure Interaction using Sharp Interface Immersed Boundary Method,” FEDSM2016-7861, Proceedings of the ASME 2016 Fluids Engineering Division Summer Meeting, July 10-14, 2016, Washington, DC, USA.
- Amritkar, A., Tafti, D. K., CFD computations using preconditioned Krylov solver on GPUs, Proceedings of the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting and 11th International Conference on Nanochannels, Microchannels, and Minichannels, Paper No. FEDSM2014-21669, August 3-7, 2014, Chicago, Illinois, USA.
- Dilip, D. and Tafti, D. K., Wall modeled Large Eddy simulation of flow over a wall- mounted hump, Proceedings of the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting and 11th International Conference on Nanochannels, Microchannels, and Minichannels, Paper No. FEDSM2014-21517, August 3-7, 2014, Chicago, Illinois, USA.
- Nagendra and Tafti, D. K., Flows Through Reconstructed Porous Media Using Immersed Boundary Methods, ASME Summer Heat Transfer Conference, Puerto Rico, July 8-12, 2012.
- Patil, S. and Tafti D. K., Wall Modeled Large Eddy Simulation of Flow over a Backward Facing Step with Synthetic Inlet Turbulence, AIAA-2011-0747, 49th Aerospace Sciences Meeting, Orlando Florida, Jan. 4-7, 2011.
- Gopalakrishnan, P. and Tafti, D. K., A Parallel Multiblock Boundary Fitted Dynamic Mesh Solver for Simulating Flows with Complex Boundary Movement,
__AIAA 38th Fluid Dynamic Conference__, Seattle, Washington., June 2008. - S-M.. Li, D. K. Tafti, An Improved Mean-Field Free-Energy Lattice Boltzmann Method for Liquid-Vapor Interfaces, FEDSM2006-98021,
__ASME Joint US-European Fluids Engineering Summer Meeting__, July 17-20, 2006, Miami, Florida, USA. - S-M. Li, D. K. Tafti, Contact line dynamics in liquid-vapor flows using Lattice Boltzmann Method, FEDSM2006-98022,
__ASME Joint US-European Fluids Engineering Summer Meeting__, July 17-20, 2006, Miami, Florida, USA. - Wasistho, W., Haselbacher, A., Najjar, F., Tafti D., Balachandar, S., Moser R. D., Direct and Large Eddy Simulations of Compressible Wall-Injection Flows in Laminar, Transitional, and Turbulent Regimes,
__38__, AIAA 2002-4344, July 7-10, Indianiapolis, IN, 2002.^{th}AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit - Tafti D. K., GenIDLEST – A Scalable Parallel Computational Tool for Simulating Complex Turbulent Flows, Proceedings of the ASME Fluids Engineering Division, FED -Vol. 256, pp. 347-356,
__ASME-IMECE__, Nov. 2001, New York. - Ma, D. L., Togkalidou, T., Fujiwara, M., Tafti D. K. and Braatz, R. D., Modeling and simulation of multidimensional Crystallization,
__AIChE Annual Meeting__, 2000. - Ma, D. L., Togkalidou, T., Fujiwara, M., Tafti D. K. and Braatz, R. D., Identification of Pharmaceutical Crystallization Processes, IFAC World Congress on Automatic Control, Elsevier Science Ltd., Oxford, UK, 2002, paper T-Fr-A11 1.
- Allavilli, P.V.S., Tafti D. K. and Najjar, F., The Development of an Advanced Solid-Rocket Flow Simulation Program ROCFLO,
__38__, Reno, Nevada, Jan. 2000.^{th}AIAA Aerospace Sciences Meeting and Exhibit - Moser R. D., Norman M. L., Balachandar S. and Tafti D, Simulating Flows in Solid Rocket Motors,” AIAA 99-3648, by invitation at the
__30__, Norfolk VA, June 28-31, 1999.^{th}AIAA Fluid Dynamics Conference - Najjar F. and Tafti D. K., Comparison of Finite Difference Discretizations for High Reynolds Number Turbulent Channel Flow with the Dynamic Subgrid-Scale Stress Model, Advances in DNS/LES, Proceedings of the
__First AFOSR International Conference on DNS/LES__, pp. 539-546, Louisiana Tech University, Aug. 4-8, 1997. - Najjar, F. and Tafti D.K., Evaluation of the Dynamic Subgrid-Scale Stress Model in Finite-Difference LES: Effects of Grid Resolution and Inhomogeneous Test Filtering, FED-Vol. 242, pp. 229-236,
__ASME-IMECE__, Atlanta, GA, Nov. 1996. - Tafti D. K., A Study of Krylov Methods for the Solution of the Pressure-Poisson Equation on the CM-5, FED-Vol.215, pp. 1-8,
__ASME /JSME Fluids Engineering and Laser Anemometry Conference and Exhibition__, Hilton Head, South Carolina, August 13-18, 1995. - Tafti, D. K., High-Order Finite Difference Formulations for the Incompressible Navier-Stokes Equations on the CM-5, proceedings of the
__Seventh SIAM Conference on Parallel Processing for Scientific Computing__, editors: Bailey et al., pp.155-160, Feb. 1995. - Tafti, D. K., Higher Order Finite-Difference Formulations for the Incompressible Navier-Stokes Equations,
__11th AIAA Computational Fluid Dynamics Conference__*, A Collection of Technical Papers Part 2*, pp. 1065, July 1993.

- Nagendra, K. and Tafti, D. K., “A Sub-pore Model for Multi-Scale Reaction-Diffusion Problems in Porous Media,”

#### People

- Peter Windes
- Susheel Sekhar (Post-doc, 2015-18)
- Keyur Joshi (Post-doc, 2014-16)
- Amit Amritkar (PhD 2013)
- Nagendra Krishnamurthy (PhD 2014)
- Handan Liu (Post-doc, 2012-14)
- Pradeep Gopalakrishnan (Post-doc, 2010-12)
- Naresh Selvarasu (PhD 2013)

#### Publications

**JOURNAL**

- Amritkar, A., de Sturler, E., Swirydowicz, K., Tafti, D. K. and Ahuja, K. “Recycling Krylov subspaces for CFD applications,” J. Comp. Physics 303, Dec. 2015, pp. 222-237. http://dx.doi.org/10.1016/j.jcp.2015.09.040
- Amritkar, A. Tafti, D.K., “Computational fluid dynamics computations using a preconditioned Krylov solver on graphical processing units,”
*ASME J. Fluids Engineering*, January 2016, Vol. 138(1), pp. 011402-1 – 6. (https://doi.org/10.1115/1.4031159) - Liu, H., Tafti, D. K. and Li, T. Hybrid parallelism in MFIX CFD-DEM using OpenMP, Short Communication Powder Technology, 259 (2014) 22-29.(doi: 10.1016/j.powtec.2014.03.047)
- Amritkar, A., Deb, S., Tafti D. K., Efficient parallel CFD-DEM simulations using OpenMP,
*Comp. Physics*256, January 2014, 501-519. https://dx.doi.org/10.1016/j.jcp.2013.09.007 - Gopalakrishnan, P. and Tafti, D. K., Development of parallel DEM for the open source code MFIX,
*Powder Tech.*235, pp. 33-41, 2013. https://doi.org/10.1016/j.powtec.2012.09.006 - Kang, P., Selvarasu, N., Ramakrishnan, N., Ribbens, C, Tafti, D., Cao, Y and Varadarajan, S., Implementing Modular Adaptation of Scientific Software, Journal of Computational Science 3(1-2), Jan.-March 2012, pp. 28-45. https://dx.doi.org/10.1016/j.jocs.2012.01.007
- Amritkar, A., Tafti, D. K., Liu, R, Kufrin, R. and Chapman, B., OpenMP parallelism for Fluid and Fluid-Particulate Systems,
*Parallel Computing*38, pp. 501-517, 2012. https://doi.org/10.1016/j.parco.2012.05.005 - Huang, W. and Tafti, D. K., A parallel AMR Algorithm for Solving Nonlinear Dynamical Systems, Int. J. High Performance Computing Applications, 18(12), May 2004.
- Wang, G. and Tafti D.K., Performance Enhancement on Microprocessors with Hierarchical Memory Systems for Solving Large Sparse Linear Systems, Int. J. of Supercomputing Applications and High Performance Computing, Vol. 13, No. 1, pp. 63-79, Spring 1999.
- Wang G., Tafti D.K. Uniprocessor performance enhancement by Additive Schwarz preconditioners on Origin 2000, Advances in Engineering Software Vol. 29, No. 3-6, pp. 425-431, 1998.
- Wang G., Tafti D.K. Parallel performance of Additive Schwarz preconditioners on Origin 2000, Advances in Engineering Software Vol. 29, No. 3-6, pp. 433-439, 1998.
- Robichaux J., Tafti, D. K. and Vanka, S. P., Large Eddy Simulations of Turbulence on the CM-2, Numerical Heat Transfer, Part B, Vol. 21, pp. 367-388, 1992.

**CONFERENCE**

- Kang, N. K. C. Selvarasu, N. Ramakrishnan, C. J. Ribbens, D. K. Tafti, and S. Varadarajan, “Dynamic Tuning of Algorithmic Parameters of Parallel Scientific Codes,” submitted to ICCS ’10: The 10th International Conference on Computational Science. May 2010.
- Kang, N. K. C. Selvarasu, N. Ramakrishnan, C. J. Ribbens, D. K. Tafti, and S. Varadarajan, “Modular, Fine-Grained Adaptation of Parallel Programs,”
__in ICCS ’09: Proceedings of the 9th International Conference on Computational Science__. Springer, May 2009, pp. 269-279 - Bui, O. Hernandez, B. Chapman, R. Kufrin, P. Gopalkrishnan, D. Tafti. Towards an Implementation of the OpenMP Collector API, Parallel Computing, Germany, 2007.
- Hernandez, D. Tafti, P. Gopalkrishnan, L. Huang, and Barbara Chapman. Experiences in Tuning an OpenMP Application. Workshop on Architectures and Languages for Throughput Applications, Beijing, China 2008.
- Kang, M. Heffner, J. Mukherjee, N. Ramakrishnan, S. Varadarajan, C.J. Ribbens, and D.K. Tafti, The Adaptive Code Kitchen: Flexible Tools for Dynamic Application Composition, in Proceedings of the
__Next Generation Software Systems Workshop, 21st IEEE International Parallel & Distributed Processing Symposium (IPDPS’07)__, Long Beach, CA, 8 pages, March 2007. - Heiland, R. W., Baker, M. P. and Tafti, D. K., VisBench: A Framework for Remote Data Visualization and Analysis,
__Computational Science – ICCS 2001: International Conference__, San Francisco, CA, USA, May 28-30, 2001, Proceedings, Part II , Editors: V.N. Alexandrov, J.J. Dongarra, B.A. Juliano, R.S. Renner, C.J.Kenneth Tan : Lecture Notes in Computer Science 2074, 718, 2001. - Huang, W. and Tafti D. K., A Parallel Computing Framework for Dynamic Power Balancing in Adaptive Mesh Refinement Applications,
__Parallel Computational Fluid Dynamics, Towards Teraflops, Optimization and Novel Formulations__, eds. D. Keyes, A. Ecer, J. Periaux, N. Satofuka and P. Fox, pp. 249-256, Elsevier Science B. V. 2000. - Tafti D. K., Wang, G., Application of Embedded Parallelism to Large Scale Computations of Complex Industrial Flows, Proceedings of the
__ASME Fluids Engineering Division__, FED Vol. 247, pp. 123-130, 1998__ASME-IMECE__, Anaheim, CA. Nov. 1998. - Tafti D. K., Wang, G., and Lin, W., Transitional Flow and Heat Transfer Characteristics of Developing Flow in Louvered Fin Arrays,
__Conference and Exhibit – Heat Exchangers for Sustainable Development__, Lisbon, Portugal, June 15-18, 1998. - Wang, G. and Tafti D. K., Uniprocessor performance enhancement by additive Schwarz preconditioners on Origin 2000,”
__4th National Symposium on Large-Scale Analysis and Design on High-Performance Computers and Workstations__, October 15-17, 1997, Williamsburg, VA. - Wang, G. and Tafti D. K., Parallel performance of additive Schwarz preconditioners on Origin 2000,
__4th National Symposium on Large-Scale Analysis and Design on High-Performance Computers and Workstations__, October 15-17, 1997, Williamsburg, VA. - Wang, G. and Tafti D. K., A parallel programming model for industrial CFD applications on microprocessor based systems. Proceedings of the ASME Fluids Engineering Division,FED-Vol. 244, pp. 493-500,
__ASME-IMECE__, November 16-21, 1997, Dallas, Texas. - F. and Tafti D.K. Implementation and Performance of a Data-Parallel Algorithm for the Dynamic Subgrid-Scale Stress Model on a Massively Parallel Computer, FED-Vol. 238, pp. 225-231,
__ASME Fluids Engineering Division Conference__, San Diego, CA, July 1996. - Tafti, D. K., Implementation of a General Purpose Finite-Difference Algorithm on the CM-5 for Direct Numerical Simulations of Turbulence,
__11th AIAA Computational Fluid Dynamics Conference__*, A Collection of Technical Papers Part 2*, pp. 1069, July 1993.

#### People

- Naveen Raj (IIT-Madras)
- Ze Cao
- Vivek Srinivasan (MS 2019)
- Steven Paul (MS 2018)
- Husam El-Ghanney (PhD 2018)
- Long He (PhD 2014)
- Surya Deb (PhD 2013)
- Amit Amritkar (PhD 2013)
- Handan Liu (Post-doc. 2012-14)
- Pradeep Gopalakrishnan (Post-doc, 2010-12)

#### Publications

**JOURNAL**

- Cao Z. and Tafti D.K., “Investigation of drag, lift and torque for fluid flow past a low aspect ratio (1:4) cylinder,”
*Computers & Fluids*177, 30 Nov. 2018, pp. 123-135. https://doi.org/10.1016/j.compfluid.2018.10.002 - He L, and Tafti D.K. “A Supervised Machine Learning Approach for Predicting Variable Drag Forces on Spherical Particles in Suspension,”
*Powder Technology*345 (2019) 379-389. https://doi.org/10.1016/j.powtec.2019.01.013 - Elghannay, H. and Tafti D. K. and Yu, K, “Evaluation of physics based hard-sphere model with the soft sphere model for dense fluid-particle flow systems,” Int.
*Multiphase Flow*112, March 2019, pp. 100-115. https://doi.org/10.1016/j.ijmultiphaseflow.2018.12.004 - Elghannay, H. and Tafti D. K., “Alternate Tangential Impact Treatments for the Soft-Sphere Collision Model,”
*Particulate Science and Technolo**gy*, Jan. 2019 https://doi.org/10.1080/02726351.2018.1549173 - He, L. and Tafti, D.K., “Variation of drag, lift and torque in an assembly of ellipsoidal particles,”
*Powder Technology*335, July 2018, 409–426. doi:__10.1016/j.powtec.2018.05.031__. - Elghannay, H. and Tafti D. K., “Revised Partial Coupling for in Fluid-Particulate Systems,”
*of Computational Multiphase Flows,*August 4, 2018. https://doi.org/10.1177/1757482X18791885 - He, L. and Tafti, D.K. “Heat Transfer in an Assembly of Ellipsoidal Particles at Low to Moderate Reynolds Numbers,”
*J. of Heat Mass Transfer*114, Nov. 2017, pp. 324-336. DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2017.06.068 - Elghannay, H. and Tafti D. K., “Sensitivity of Numerical Parameters on DEM Predictions of Sediment Transport”
*Particulate Science and Technology*, vol. 36, pp. 438-446. http://dx.doi.org/10.1080/02726351.2017.1352638 - He, L. and Tafti D. K. and Nagendra K, “Evaluation of Drag Correlations Using Particle Resolved Simulations of Spheres and Ellipsoid in Assembly,”
*Powder Technology*313, 15 May 2017, pp. 332-343. https://doi.org/10.1016/j.powtec.2017.03.020 - Elghannay, H. A. and Tafti, D. K., “LES-DEM Simulations of Sediment Transport,”
*J. of Sediment Research*vol 33, No. 2, June 2018, pp. 137-148. https://doi.org/10.1016/j.ijsrc.2017.09.006 Best Paper Award - Elghannay, H. and Tafti, D. K. “Development and Validation of a Reduced Order History Force Model,” Int. J. Multiphase Flow Volume 85, October 2016, Pages 284–297. http://dx.doi.org/10.1016/j.ijmultiphaseflow.2016.06.019
- Nagendra, K. and Tafti, D. K., “A Sub-pore Model for Multi-Scale Reaction-Diffusion Problems in Porous Media,” Int. J. Heat Mass Transfer 84, May 2015, pp. 463-474. (doi:10.1016/j.ijheatmasstransfer.2014.12.034)
- Deb, S. and Tafti, D. K., “Two and three dimensional modeling of fluidized bed with multiple jets in a DEM–CFD framework,”
*of Particuology*16, Oct. 2014, pp. 19-28. (doi:10.1016/j.partic.2014.04.005) - Deb, S. and Tafti, D. K., “Investigation of flat bottomed spouted bed with multiple jets using DEM-CFD framework,” Powder Technology Vol. 254, march 2014,pp.387-402.(doi: 1016/j.powtec.2014.01.045)
- Deb, S. and Tafti, D.K., A Novel Two Grid Formulation for Fluid-Particle Systems using the Discrete Element Method, J. Powder Technology 246 (2013), pp. 601-616. (Doi:1016/j.powtec.2013.06.014)

**CONFERENCE**

- Muralidhar, N., Bu, Jie., Cao, Ze., He, L., Ramakrishnan, N., Tafti, D., & Karpatne, A. “Physics-guided Design and Learning of Neural Networks for Predicting Drag Force on Particle Suspensions in Moving Fluids.” In
*Proceedings of the 2020 SIAM International Conference on Data Mining*. Society for Industrial and Applied Mathematics. - Elghannay, H. and Tafti D. K., “Sensitivity of Numerical Parameters on DEM Predictions of Sediment Transport” Second International Conference and Exhibition on Powder, Granule and Bulk Solids: Innovations and Applications, December 1-3, 2016, Jaipur, Rajasthan, India.
- Elghannay, H and Tafti, D. K., “Evaluation of Coarse Graining DEM Using Representative Particle Model,” Proceedings of the 7
^{th}International Conference on Discrete Element Methods, Springer Proceedings in Physics, eds. Xikui Li, Yuntian Feng and Graham Mustoe, Vol. 188, pp 56-65. Aug. 1-Aug. 4, 2016, Dalian, China. - Elghannay, H, Yu, K and Tafti D.K.,”On the improvement of CFD-DEM Coarse Graining Predictions,” FEDSM2016-7805, Proceedings of the ASME 2016 Fluids Engineering Division Summer Meeting, July 10-14, 2016, Washington, DC, USA.
- Elghannay, H. A. and Tafti, D. K., DEM Predictions of NETL small scale challenge problem, Proceedings of the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting and 11th International Conference on Nanochannels, Microchannels, and Minichannels, Paper No. FEDSM2014-21032, August 3-7, 2014, Chicago, Illinois, USA.
- Deb, S. and Tafti, D.K., Discrete Element Modeling and Validation of Fluidized Bed with Multiple Jets, ASME Summer Heat Transfer Conference, Puerto Rico, July 8-12, 2012.
- Amritkar, A. and Tafti, D. K., Particle Scale Heat Transfer Analysis in Rotary Kiln, ASME Summer Heat Transfer Conference, Puerto Rico, July 8-12, 2012.

- Cao Z. and Tafti D.K., “Investigation of drag, lift and torque for fluid flow past a low aspect ratio (1:4) cylinder,”

#### People

- Peter Windes
- Aevelina Rahman
- Xiaozhou Fan (MS 2017)
- Keyur Joshi (Post doc, 2014-16)
- Kamal Viswanath (PhD 2013)
- Pradeep Gopalakrishnan (PhD 2008)

#### Publications

**JOURNAL**

- Windes, P., Tafti, D. K., Müller, R. “Determination of spatial fidelity required to accurately mimic the flight dynamics of a bat,”
*& Biomim*, August 2019, https://doi.org/10.1088/1748-3190/ab3e2a - Sekhar, S. Windes, P., Fan, X., Tafti, D.K. “Canonical Description of Wing Kinematics and Dynamics for a Straight Flying Insectivorous Bat (
*Hipposideros Pratti*)”,*PLoS ONE 14(6) e0218672*, 2019. https://doi.org/10.1371/journal.pone.0218672 - Windes, P., Fan, X., Bender, M.,Tafti, D.K., Müller, R. “A computational investigation of lift generation and power expenditure of Pratt’s roundleaf bat (Hipposideros pratti) in forward flight,”
*PLoS ONE*13(11), November 28, 2018. https://doi.org/10.1371/journal.pone.0207613 - Viswanath, K., Nagendra, K., Cotter, J., Frauenthal, M. and and Tafti, D.K. Straight-Line Climbing Flight Aerodynamics of a Fruit Bat, Physics of Fluids 26 021901 (2014); (https://doi.org/10.1063/1.4864297)
- Gemmel, B. J., Costello, J. H., Colin, S. P., Colin, S. J., Dabiri, J. O., Tafti, D. K., Priya, S., Passive energy recapture in jellyfish contributes to propulsive advantage over other metazoans, Proc. Nat. Acad. of Sciences vol. 110 no. 44 17904-17909, (doi: 1073/pnas.1306983110)
- Viswanath, K. and Tafti, D. K., Effect of Stroke Deviation on Forward Flapping Flight, AIAA J. Vol. 51, No. 1, January 2013.
- Viswanath K., Tafti D. K., Effect of Frontal Gusts on Forward Flapping Flight, AIAA J., 48(9), pp. 2049-2062,Sep. 2010.
- Gopalakrishnan, P. and Tafti, D. K., Effect of Wing Flexibility on Lift and Thrust Production in Flapping Flight, AIAA Journal 48(5), pp. 865-877, 2010.
- Gopalakrishnan, P. and Tafti, D. K., Effect of Rotation and Angle of Attack on Force Production of Flapping Flights, AIAA Journal, 47(11), pp. 2505-2518, 2009.

**CONFERENCE**

- Fan, X., Windes, P. and Tafti, D.K., Sekhar, S., Bender, M, Kurdila, A., Mueller, R. “Proper Orthogonal Decomposition of an insectivorous bat in straight and level flight,” AIAA Science and Technology Forum and Exposition 2018. January 8-12, 2018, Kissimmee, FL.
- Viswanath, K. Nagendra, D. Tafti. Climbing Flight of a Fruit Bat Deconstructed, AIAA SCITECH 2014. 13-17 January 2014, Maryland, USA.
- Viswanath, K. and Tafti D. K., Effect of Stroke Deviation on Forward Flapping Flight, 50th AIAA Aerospace Sciences Meeting, Nashville, Tennessee. 9-12 January 2012.
- Tafti D. K., The Unsteady Dynamics of a Flapping Wing, Thirty Seventh National and Fourth International Conference on Fluid Mechanics and Fluid Power, NCFMFP2010, IIT-Madras, India, December 16-18, 2010.
- Viswanath K. and Tafti, D. K., Effect of Frontal Gusts on Flexible Wings on Forward Flapping Flight, AIAA-2010-4869, AIAA 40th Fluids Dynamics Exhibit and Conference, Chicago, Illinois, June 28-July 1, 2010.
- Gopalakrishnan, P. and Tafti, D. K., Effect of Reynolds number, tip shape and stroke deviation on Flapping Flight, AIAA 39th Fluid Dynamic Conference, San Antonio, TX., June 22-25, 2009.
- Gopalakrishnan, P. and Tafti, D. K., Effect of Phasing of Rotation on Delayed Stall in Flapping Flights Related to Mavs at Re=10000,
__AIAA 38th Fluid Dynamic Conference__, Seattle, Washington., June 2008.

- Windes, P., Tafti, D. K., Müller, R. “Determination of spatial fidelity required to accurately mimic the flight dynamics of a bat,”

#### People

- Hamid Hosseinzadegan (PhD 2017)
- Peter Windes (MS 2016)
- Naresh Selvarasu (PhD 2013)

#### Publications

**JOURNAL**

- Hosseinzadegan, H. and Tafti, D.K., “A 3D predictive model of thrombus growth in stenosed vessels with dynamic geometries,”
*Med. Biol. Eng.*, August 2018 pp. 1-17. https://doi.org/10.1007/s40846-018-0443-5 - Hosseinzadegan, H. and Tafti, D.K., “Mini Review: Mechanisms of Platelet Activation, Adhesion and Aggregation,”
*Thromb Haemost Res*(2017);1(2):1008. - Hosseinzadegan, H. and Tafti, D.K., “Review: Modeling Thrombus Formation and Growth,”
*Biotechnology and Bioengineering*, 2017. DOI: 10.1002/bit.26343. - Hosseinzadegan, H and Tafti, D. K., Prediction of Thrombus Growth: Effect of Stenosis and Reynolds Number
*, Cardiovascular Engineering and Technology*, Vol. 8, No. 2, June 2017, pp. 164-181. DOI:10.1007/s13239-017-0304-3. - Selvarasu, N. K. C. and Tafti D. K., “Effects of Stent length, transition length and overexpansion in stented arteries,” Int. J. of Exp. Comp. Biomechanics Vol. 2, No. 3, 2014, 265-291. (doi: 10.1504/IJECB.2014.060403)
- Selvarasu, N. K. C. and Tafti D. K., Effects of elastic modulus change in helical tubes under the influence of dynamic changes in curvature and torsion, ASME J. Biomechanical Engineering Vol. 136(8), 081001, June 2014 (doi: 10.1115/1.4027661).
- Selvarasu, N. K. C, Tafti, D. K. , Investigation of the Effects of Dynamic Change in Curvature and Torsion on Pulsatile Flow in a Helical Tube, ASME J. Biomechanical Engineering, 134(7), 071005, July 2012
- Selvarasu, N. K. C, Tafti, D. K. and Vlachos, P., Hydrodynamic Effects of Compliance Mismatch in Stented Arteries, ASME J. Biomechanical Engineering, 133(2), Jan. 2011.

**CONFERENCE**

- Hosseinzadegan, H. and Tafti, D. K., “Validation of a Time-Dependent Physio-Chemical Model for Thrombus Formation and Growth,” FEDSM2016-7803, Proceedings of the ASME 2016 Fluids Engineering Division Summer Meeting, July 10-14, 2016, Washington, DC, USA.
- Windes, P, Tafti, D. K. and Behkam B., “Computational Model of Human Capillary Hydrodynamics,” FEDSM2016-7858, Proceedings of the ASME 2016 Fluids Engineering Division Summer Meeting, July 10-14, 2016, Washington, DC, USA.

- Hosseinzadegan, H. and Tafti, D.K., “A 3D predictive model of thrombus growth in stenosed vessels with dynamic geometries,”

#### People

- Maryam Morefian
- Jedhathai Boontanom (MS 2019)
- Guoyong Liu (visiting scholar, 2018-19)
- Halil Hakan Acikel (visiting scholar 2017-18)
- Hacimurat Demir (visiting scholar 2017-18)
- Yan Teng (visiting scholar 2016-17)
- Adam Norman (MS 2016)
- Venkata Ravi Kasibhotla (MS 2014)
- Adam Sponterelli (MS 2013)
- Vivek Sethapati (MS 2011)
- Jose Tijiboy (MS 2008)
- Kohei Takamuku (MS 2008)
- Keegan Delaney (MS 2007)
- Sundaram Narayan (MS 2003)

#### Publications

**JOURNAL**

- Hegde, M. Meenakshisundaram, Chartain, N., Sekhar S., Tafti D.K., Williams, C. and Long, T., “3D Printing All-Aromatic Polyimides using Mask-Projection Stereolithography: Processing the Nonprocessable, Advanced Materials 2017, 1701240. DOI:10.1002/adma.201701240.
- Narayan, S. and Tafti, D. K., Evaluation of Microchamber Geometries and Surface Conditions for Electrokinetic Driven Mixing, Analytical Chemistry, 76, 3785-3793, 2004.
- L. Ma, D. K. Tafti, and R. D. Braatz. Optimal control and simulation of multidimensional crystallization, Special Issue on Distributed Parameter Systems, Comp. & Chem. Eng., 26, pp. 1103-1116, 2002.
- D. Braatz, M. Fujiwara, D. L. Ma, T. Togkalidou, and D. K. Tafti. Simulation and new sensor technologies for industrial crystallization: A review. Int. J. of Modern Physics B, 16, pp. 346-353, 2002.
- Tafti, D. K., Vorticity and Scalar Transport in Separated and Reattached Flow on a Blunt Plate, Physics of Fluids A 5(7), pp. 1661-1673, July 1993.
- Tafti, D.K. and Vanka, S.P., A Three-Dimensional Numerical Study of Flow Separation and Reattachment on a Blunt Plate, Physics of Fluids A 3 (12), pp. 2887-2909, Dec.1991.
- Tafti, D. K. and Vanka, S.P., Numerical Study of Flow Separation and Reattachment on a Blunt Plate, Physics of Fluids A 3 (7), pp. 1749-1759, July 1991.
- Tafti, D. K. and Vanka, S. P., A Numerical Study of the Effects of Spanwise Rotation on Turbulent Channel Flow, Physics of Fluids A 3 (4), pp. 642-656, April 1991.
- Tafti, D. K. and Vanka, S. P., Hot Gas Environment Around STOVL Aircraft in Ground Proximity, Part 2: Numerical Study, Aircraft, Vol. 1, No. 1, Jan.-Feb. 1991.

**CONFERENCE**

- Norman, A. and Tafti, D. K., “The effect of advance ratio, solidity, and wake interactions on a 2D vertical axis turbine,” Paper No. FEDSM2016-7801, Proceedings of the ASME 2016 Fluids Engineering Division Summer Meeting, July 10-14, 2016, Washington, DC, USA.
- Kasibhotla, V. R. and Tafti, D. K., Dynamic Stall Simulation of Flow over NACA0012 Airfoil at 1 million Reynolds number, IMECE2015-50827, Proceedings of the ASME 2015 International Mechanical Engineering Congress & Exposition, IMECE2015 , November 13-19, 2015, Houston, Texas, USA
- Kasibhotla, V. R. and Tafti, D. K., Large eddy simulation of the flow past pitching NACA0012 airfoil at 1E05 Reynolds number, Proceedings of the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting and 11th International Conference on Nanochannels, Microchannels, and Minichannels, Paper No. FEDSM2014-21588, August 3-7, 2014, Chicago, Illinois, USA.
- Viswanathan, A.K., Tafti, D.K., Numerical Analysis of Circulation Control on a NCCR 1510-7607N Airfoil using RANS Models, 2004 Circulation Control Conference, March 16-17, Hampton, Virginia, USA. NASA/CP-2005-213509. pp 197- 226, 2004.
- Narayan, S. and Tafti, D. K., Electrokinetically Induced Mixing in a Microchamber, IMECE2003-41099,
__2003 ASME International Mechanical Engineering Congress and R&D EXPO__, Washington, D. C., USA, November 15 -21, 2003. - Tafti D. K., Menon R. G., Large-Eddy Simulations of Flow Induced Vibrations in a Vacuum Flasher Unit
__, 4th International ASME/JSME/KSME Symposium on Computational Technologies for Fluid/Thermal/Chemical Systems with Industrial Applications__, August 4-8, 2002, Vancouver, British Columbia, Canada. - Joshi, D., Vanka, S. P. and Tafti, D. K., Large-Eddy Simulations of the Wake of a Normal Flat Plate, FED-Vol. 184, pp. 231-242,
__ASME Fluids Engineering Division Summer Meeting__*,*Lake Tahoe, Nevada, June 19-23, 1994. - Tafti, D. K. and Vanka, S. P., Hot Gas Environment Around STOVL Aircraft in Ground Proximity, Part 2: Numerical Study, paper 90-2270 at 26th
__AIAA/ASME/ASEE Joint Propulsion Conference__, Orlando, Florida, July 16-18, 1990.

**Laboratory address:**

226 Goodwin Hall

635 Prices Fork Road, Blacksburg, VA 24061

**Department of Mechanical Engineering
**College of Engineering, Virginia Tech

635 Prices Fork Road, Blacksburg, VA 24061

540-231-6045