STEPHEN M. RUFFIN, Ph.D., Associate Professor

Director, NASA Georgia Space Grant Consortium

Georgia Institute of Technology

School of Aerospace Engineering

Atlanta, GA 30332-0150

voice: (404) 894-8200

fax: (404) 894-2760

email: stephen.ruffin@aerospace.gatech.edu

 

 

IMPORTANT LINKS

EARNED DEGREES

 

University                                                                           Field                                                                      Degree Year

Stanford University                                                          Aeronautics and Astronautics                      Ph.D.     1993

Massachusetts Institute of Technology                      Aeronautics and Astronautics                      M.S.        1987

Princeton University                                                        Mechanical and Aerospace Eng.                  B.S.E.     1985

 

 

EMPLOYMENT HISTORY

 

                                        Georgia Institute of Technology                                                         Atlanta, GA

9/99 - Present              Associate Professor, School of Aerospace Engineering

7/93 – 8/99                   Assistant Professor, School of Aerospace Engineering

 

                                        Massachusetts Institute of Technology                                            Cambridge, MA

9/00 - 8/01                    Visiting Associate Professor, Aeronautics and Astronautics

 

                                        NASA Ames Research Center                                                             Moffett Field, CA

6/87 - 6/93                    Aerospace Engineer, Thermosciences Division

 

                                        Massachusetts Institute of Technology                                            Cambridge, MA

9/85 - 5/87                    Aerospace Scientist, Computational Fluid Dynamics Laboratory

 

                                        NASA Lewis Research Center                                                            Cleveland, OH

6/85 - 8/85                    Aerospace Engineer, Internal Fluid Mechanics Division

6/84 - 8/84                    Aerospace Engineer, Propulsion Systems Division

 

                                        Princeton University                                                                               Princeton, NJ

9/84 - 2/85                    Researcher, Space Propulsion Laboratory

9/83 - 4/84                    Researcher, Space Propulsion Laboratory

 

 

EXPERIENCE SUMMARY

                Dr. Ruffin is an Associate Professor in the School of Aerospace Engineering at Georgia Tech, Director of NASA’s Georgia Space Grant Consortium, Head of the Aerothermodynamics Research and Technology Laboratory and Chair of the Aerodynamics and Fluid Mechanics Group. He is a specialist in high temperature gas dynamics, compressible flow aerodynamics, and airframe propulsion integration.  He is leading development of a 3-D Cartesian Grid based Navier-Stokes solver for design applications and development of Cartesian-grid approaches for chemically reacting flows.  He has developed novel approaches will allow for Navier-Stokes simulations using a purely Cartesian grid solver.  His Aerothermodynamics Research and Technology Laboratory applied these techniques to applications as diverse as hypersonic planetary entry vehicles and flow physics, rotorcraft airframe interaction flows, transonic and supersonic missiles and unsteady store separation problems.

Dr. Ruffin is also conducting research on high speed, high temperature flows in which vibrational energy modes are substantially excited and in which chemical non-equilibrium exists.  Dr. Ruffin has developed a novel thermo-chemical model which provides improved predictions in these types of flows.  He has conducted sponsored research studies of a novel channel concept which provides increased lift/drag ratios and reduced sonic boom relative to conventional blunted geometries.  Dr. Ruffin led several computational and experimental studies in a NASA ballistic range of blunted re-entry vehicles and noses employing this concept.

As principal investigator of the NASA Ames 3-D NASP Nozzle Simulation Project he developed a 3-D Navier-Stokes computer program for accurately predicting the propulsive exhaust flow and its interaction with a generic afterbody region.  The computed results were used to help design a wind tunnel experiment which modeled the nozzle/afterbody flow field.  He is conducting rotor-airframe interaction studies, moving/flexible aerodynamic studies, tip vortex analysis using solution adaptive computational grids, and has developed a unique “dynamically slotted” rotor which is designed to reduce the occurrence of dynamic stall on rotorcraft.

As a researcher in the computational fluid dynamics laboratory at MIT, Dr. Ruffin conducted studies of viscous-inviscid interaction on vortex dominated hypersonic flows over delta wings.  This work involved developing an accurate and efficient, Navier-Stokes solver for vortex flow analysis.

                Dr. Ruffin is committed to the diversification student Georgia Tech and affiliate institutions.  He works with numerous campus organizations in their recruitment and retention efforts.  Dr. Ruffin is Director of the Alfred P. Sloan Scholars Program in Aerospace Engineering.  He recruits and mentors students for this program which provides graduate fellowships to students from under-represented populations who pursue Ph.D. degrees in Aerospace Engineering.    Dr. Ruffin serves on the steering committee which developed the $2.5M NSF funded, FACES Program whose goal is to increase diversity in Engineering, Sciences and Computing.   This program is a consortium which includes Morehouse College, Spelman College, Emory University and Georgia Tech.  Dr. Ruffin helps direct this highly successful program which includes graduate fellowships, undergraduate research programs, academic and career guidance, mentoring activities and provides start-up grants to those graduate accepting faculty appointments. 

Dr. Ruffin has demonstrated that he is an outstanding educator.  In fact, his teaching effectiveness scores have been excellent and he has been awarded the Meritor Inc. Faculty Excellence Award, 2000 (Granted by the Women in Engineering Program at Georgia Tech), and was awarded the CETL/Amoco Junior Faculty Teaching Excellence Award.  His teaching skills have been honed through participation in the American Society for Engineering Education (ASEE) National Effective Teaching Institute and as a “Class of 1969 Teaching Fellow.”  He served on the COE Dean’s Committee on Evaluation of Instruction which established a plan for implementation for peer review of teaching.  His areas of service to this institute have grown substantially and include service on the Honor Committee, COE Promotion, Reappointment and Tenure Committee, AE Graduate Committee, and the COE Dean’s Faculty Advisory Committee.

Awards received include NASA Superior Performance Award (1992), NASA National Aerospace Plane CFD Validation Team Award (1992), AIAA Best Thermophysics Paper Award (1993), CETL/Amoco Junior Faculty Teaching Excellence Award (1997), Meritor Inc. Faculty Excellence Award, 2000.  Dr. Ruffin has published over 57 articles in refereed journals and conference proceedings.

 

 

SCHOLARLY ACCOMPLISHMENTS

 

Refereed Publications

 

1.       Ruffin, S.M., Hypersonic Viscous Solutions for Flow over Delta Wings, MIT M.S. Thesis, May 1987.

 

2.       Ruffin, S.M., "Solutions for Hypersonic Viscous Flow Over Delta Wings," MIT CFDL TR 87-4, pp. 1-102, May 1987.

 

3.       Ruffin, S.M., Venkatapathy, E., Keener, E.R., Spaid, F.W., "Hypersonic Single Expansion Ramp Nozzle Simulations," Journal of Spacecraft and Rockets, Vol 29, No. 6, pp. 749-755, November-December 1992.

 

4.       Ruffin, S.M., Vibrational Energy Transfer of Diatomic Gases in Hypersonic Expanding Flows, Stanford University Ph.D. Thesis, June 1993.

 

5.       Ruffin, S.M., "Vibrational Energy Transfer of Diatomic Gases in Hypersonic Expanding Flows," Stanford University Department of Aeronautics and Astronautics Report No. 635, pp. 1-175, June 1993.

 

6.       Ruffin, S.M., and Park, C., "Vibrational Relaxation of Anharmonic Oscillators in Expanding Flows," Journal of Spacecraft and Rockets, Vol. 30, No. 1, pp. 59-68, January-February 1993.

 

7.       Sharma, S.P., Ruffin, S.M., Meyer, S.A., Gillespie, W.D., Yates, L.A., "Density Measurements in an Expanding Flow Using Holographic Interferometry," Journal of Thermophysics and Heat Transfer, Vol. 7, No. 2, pp. 261-268, April-June 1993.

 

8.       Sharma, S.P., Ruffin, S.M., Gillespie, W.D., Meyer, S.A., "Vibrational Relaxation Measurements in an Expanding Flow Using Spontaneous Raman Scattering," Journal of Thermophysics and Heat Transfer, Vol. 7, No. 4, pp. 697-703, October-December 1993.

 

9.       Ruffin, S.M., "Prediction of Vibrational Relaxation in Hypersonic Expanding Flows - Part I: Model Development," Journal of Thermophysics and Heat Transfer, Vol. 9, No. 3, July-Sept 1995.

 

10.    Ruffin, S.M., "Prediction of Vibrational Relaxation in Hypersonic Expanding Flows - Part II: Results," Journal of Thermophysics and Heat Transfer, Vol. 9, No. 3, July-Sept 1995.

 

11.    Ruffin, S.M., Gupta, A. and Marshall, D., “Supersonic Channel-Airfoils for Reduced Drag,” AIAA Journal, Vol. 38, No. 3, Mar., 2000, pp. 480-486.

 

12.    Gupta, A., and Ruffin, S.M., “Aerothermodynamic Design of Supersonic Channel-Airfoils for Drag Reduction,” Journal of Aerospace – SAE 1997 Transactions, Vol. 106, Section I, July, 1997, pp. 1647-1656.

 

13.    Gupta, A., Ruffin, S.M., “Optimal Artificially Blunted Leading Edge (ABLE) Airfoils for Hypersonic Performance Enhancement,” Journal of Spacecraft and Rockets, Vol. 36, No. 4, pp. 499-506, July-Aug., 1999.

 

14.    Gupta, A., Ruffin, S.M., Newfield, M., and Yates, L, “Aerothermodynamic Performance Enhancement and Design of Blunted Sphere-Cones using the ABLE Concept,” Journal of Spacecraft and Rockets, Vol. 37, No. 2, Mar.-Apr. 2000.

 

15.    Josyula, E, Bailey, W.F., and Ruffin, S.M., “Role of Reactive and Non-Reactive Vibrational Energy Exchanges in Nonequilibrium Hypersonic Flows, Physics of Fluids, Vol. 15, No. 10, Oct. 2003.

 

16.    Ruffin, S.M., “The Georgia Tech Recruitment and Retention Continuum,” Proceedings of the ASEE Gulf-Southwest Conference, Baton Rouge, LA, March, 2006.

 

17.    Lee, Jinwook, Orsini, A., and Ruffin, S.M., “Unstructured Cartesian-Grid Methodology for Non-equilibrium Hypersonic Flows,” Accepted in Journal of Thermophysics and Heat Transfer, July 2009.

 

18.    Malo-Molina, F., Gaitonde, D., Ebrahimi, H, and Ruffin, S.M., “High Fidelity Flowpath Analysis of a Supersonic Combustor Coupled to Innovative Inward-Turning Inlets,” Accepted in  AIAA Journal, Feb. 2009

 

19.    Ruffin, S.M., Lee, J.D., “Rotorcraft Flowfield Prediction Accuracy and Efficiency using a Cartesian Grid Framework,” International Journal of Mathematical Models and Methods in Applied Sciences, Vol. 3, No. 1, 2009.

 

20.    Ruffin, S.M., Lee, J.D., “Adaptation of a k-Epsilon Model to a Cartesian Grid Based Methodology,” International Journal of Mathematical Models and Methods in Applied Sciences, Vol. 3, No. 1, 2009.

 

Patents and Invention Disclosures

 

1.       Patent: Ruffin, S.M., “Leading Edge Channel for Enhancement of Lift/Drag Ratio and Reduction of Sonic Boom, AWARDED: October 15, 2002

 

2.       Software Disclosure, “Numerical Aerodynamics Simulation via CARTesian Grid Techniques: NASCART-GT,” February 11, 2003.

 

Other Publications

 

1.       Ruffin, S.M., Murman, E., "Solution for Hypersonic Viscous Flow Over Delta Wings, "AIAA Paper 88-0126, January 1988.

 

2.       Spaid, F.W., Keener, E.R., Ruffin, S.M., Venkatapathy, E., "Aspects of a Hypersonic Nozzle/Afterbody and Code Validation Experiment," 5th National Aero-Space Plane Symposium, Paper No.    50, October 1988.

 

3.       Ruffin, S.M., Venkatapathy, E., Keener, E.R., Nagaraj, N., "Computational Design Aspects of a NASP Nozzle/Afterbody Experiment," AIAA Paper 89-0446, January 1989.

 

4.       Ruffin, S.M., Venkatapathy, E., Feiereisen, W.J., Lee, S.H., "Progress in Computing Nozzle/Plume Flow Fields," Proceedings of the NASA Computational Fluid Dynamics Conference at NASA Ames, NASA Conference Publication 10038, Vol. 2, March 1989.

 

5.       Venkatapathy, E., Ruffin, S.M., Lee, S.H., Deiwert, G.S., Feireisen, W.J., "Development and Applications of a Nozzle/Afterbody Flow Solver," NASP CR 1068, January 1990.

 

6.       Spaid, F.W., Keener, E.R., Ruffin, S.M., "Experimental Results and CFD Code Validation for a Hypersonic Nozzle / Afterbody Flow Field," 9th National Aero-Space Plane Symposium, Paper No. 123, November 1990.

 

7.       Ruffin, S.M., Venkatapathy, E., Tokarcik, S., Lee, S.H., Spaid, F., Keener, E.R., Feiereisen, W.J., "Development and Validation of the F3D/Nozzle Code," 10th National Aero-Space Plane Symposium, Paper No. 142, April 1991.

 

8.       Ruffin, S.M., "Solutions for Hypersonic Viscous Flow over Delta Wings," NASA Tech Briefs, Vol. 15, No. 12, ARC 12179, December 1991.

 

9.       Ruffin, S.M., Venkatapathy, E., Lee, S.H., Keener, E.R., Spaid, F.W., "Single Expansion Ramp Nozzle Simulations," AIAA paper 92-0387, January 1992.

 

10.    Ruffin, S.M., and Park, C., "Vibrational Relaxation of Anharmonic Oscillators in Expanding Flows," AIAA Paper 92-0806, January 1992.

 

11.    Sharma, S.P., Ruffin, S.M., Meyer, S.A., Gillespie, W.D., Yates, L.A., "Density Measurements in an Expanding Flow Using Holographic Interferometry," AIAA Paper 92-0809, January 1992.

 

12.    Sharma, S.P., Ruffin,  S.A., Gillespie, S.M., Meyer,W.D., "Nonequilibrium Vibrational Population Measurements in an Expanding Flow Using Spontaneous Raman Scattering," AIAA Paper 92-2855, July 1992.

 

13.    Gillespie. W.D., Bershader, D., Sharma, S.P., Ruffin, S.M., "Raman Scattering Measurements of Vibrational and Rotational Distributions in Expanding Nitrogen," AIAA Paper 93-0274, January 1993.

 

14.    Ruffin, S.M., "Prediction of Vibrational Relaxation in Hypersonic Expanding Flows," AIAA Paper 94-0456, January 1994.

 

15.    Ruffin, S.M. and Gupta, A., “Supersonic Channel-Airfoils for Reduced Drag,” AIAA Paper 97-0517, January 1997.

 

16.    Newfield, M. and Ruffin, S.M., “Validation of a Nose Channel Concept for Supersonic Drag Reduction,” NASA TM-1998-112216, October 1997.

 

17.    Gupta, A., Ruffin, S.M., “Aerothermodynamic Design of Supersonic Channel-Airfoils for Drag Reduction,” SAE International, World Aviation Congress Paper 97WAC-49, October, 1997.

 

18.    Gupta, A., Ruffin, S.M. and Newfield, M. “Aerothermodynamic Performance Enhancement and Design of Blunted Sphere-Cones using the ABLE Concept,” AIAA Paper 99-0897, January, 1999.

 

19.    Gupta, A. and Ruffin, S.M. “Investigation of Artificially Blunted Leading Edge Geometries with Curved Channels for High Speed Drag Reduction,” AIAA Paper 2000-0901, January, 2000.

 

20.    Tam, T., Ruffin, S., Gage, P., Bogdanoff, D., Yates, Y., Morgenstern, J., “Sonic Boom Testing of Artificially Blunted Leading Edge (ABLE) Concepts in the NASA Ames Aeroballistic Range,” AIAA Paper 2000-1011, January, 2000.

 

21.    Gupta, A., Ruffin, S.M., "Application of the Artificially Blunted Leading Edge Concept for Directional Control of High Speed Vehicles," AIAA Paper 2000-2598, June, 2000.

 

22.    Chen, L, and Ruffin, S.M., "Evaluation of Multi-Element Airfoils for Dynamic Stall Mitigation," AHS Aeromechanics Specialists Meeting, Atlanta, GA, November, 2000.

 

23.    Marshall, D., Aftosmis, M.J., and Ruffin, S.M., "Study of Parallelization Enhancements for Cartesian Grid Solver," International Conf. on Parallel CFD, May, 2002.

 

24.    Tu, Shuangzhang, Ruffin, S.M., "Solution Adaptive, Unstructured Cartesian-Grid Methodology for Chemically Reacting Flows", AIAA Paper 2002-3097, June, 2002.

 

25.    Tu, Shuangzhang, Ruffin, S.M., "Calculation of Nonequilibrium Flows Using a Solution Adaptive, Unstructured Cartesian-Grid Methodology", AIAA Paper 2002-3098, June, 2002.

 

26.    Josyula, E, Bailey, W.F., and Ruffin, S.M., “Role of Reactive and Non-Reactive Vibrational Energy Exchanges in Nonequilibrium Hypersonic Flows, AIAA Paper 2002-3220, June 2002.

 

27.    Ruffin, S.M., O’Brien, D.O., Smith, M.J., Hariharan, N., Lee, J.D., Sankar, L.N, “Comparison of Rotor-Airframe Interaction Predictions Utilizing Overset and Unstructured Grid Techniques AIAA Paper 2004-0046, Jan., 2004.

 

28.    Marshall, D., and Ruffin, S.M., "A New Inviscid Wall Boundary Condition Treatment for Embedded Boundary Cartesian Grid Schemes,” AIAA Paper 2004-0583 Jan. 2004.

 

29.    Marshall, D., and Ruffin, S.M., " An Embedded Boundary Cartesian Grid Scheme for Viscous Flows using a New Viscous Wall Boundary Condition Treatment,” AIAA Paper 2004-0581 Jan. 2004.

 

30.    Duque, E., Sankar, L, Menon, S., Bauchau, O., Ruffin, S., Smith, M., Ahuja, K, Brentner, K, Long, L, Morris, P, Ghandi, F., “Revolutionary Physics-Based Design Tools for Quiet Helicopters” AIAA Paper 2006-1068 Jan. 2006.

 

31.    Malo-Molina, F., Gaitonde, D.V., Ebrahimi, H.B, and Ruffin, S.M., “Analysis of an Innovative Inward Turning Inlet Using an Air-JP8 Combustion Mixture at Mach 7,” AIAA Paper 2006-3041 June 2006.

 

32.    Malo-Molina, F., Gaitonde, D.V., Ebrahimi, H.B, and Ruffin, S.M., “Numerical Simulation of a Generic High/Speed Inlet/Combustor with JP8 Fuel,” AIAA Paper 2006-4871 June 2006.

 

33.    Malo-Molina, F., Gaitonde, D., Ebrahimi, H, and Ruffin, S.M., “Analysis of a Hypersonic Inward Turning Inlet Followed by a TVC Using an Air-Hydrocarbon Fuel Mixture,” AIAA Paper 2006-4683 July 2006.

 

34.    Lee, J.D., Ruffin, S.M., “Application of a Turbulent Viscous Cartesian-Grid Methodology to Flow Fields with Rotor-Fuselage Interaction,” AIAA Paper 2007-1280, Jan.  2007.

 

35.    Lee, J.D., Ruffin, S.M., “Development of a Turbulent Wall-Function Based Viscous Cartesian-Grid Methodology,” AIAA Paper 2007-1326, Jan.  2007.

 

36.    Martinelli, S., Ruffin, S.M., Hash, D., Wright, M. McDaniels, R., Brown, J., “Validation Processes for Blowing and Transpiration-Cooling in DPLR,” AIAA Paper 2007-4255, June 2007.

 

37.    Lee, Jinwook, Orsini, A., and Ruffin, S.M., “Unstructured Cartesian-Grid Methodology for Non-equilibrium Hypersonic Flows,” AIAA Paper 2007-0548, June 2007.

 

38.    Lee, Jinwook, Rohrschneider, R., Ruffin, S.M., and Braun, R. “Fluid-Structure Analysis of a Clamped Ballute in Titan's Atmosphere,” AIAA Paper 2007-4308, June 2007.

 

39.    Lee, Jinwook, and Ruffin, S.M., “Parallel Computation of Solution Adaptive Cartesian Grids with SFC” AIAA Paper 2007-4088, June 2007.

 

40.    Malo-Molina, F., Gaitonde, D., Ebrahimi, H, and Ruffin, S.M., “Scramjet Combustor Analysis Integrated to an Innovative Inward Turning Inlet” AIAA Paper 2008-4577, July, 2008.

 

41.    Malo-Molina, F., Gaitonde, D., Ebrahimi, H, and Ruffin, S.M., “High Fidelity Flowpath Analysis of a Supersonic Combustor Coupled to Innovative Inward-Turning Inlets” AIAA Paper 2009-131 Jan. 2009.

 

42.    Lee, J.D., Ruffin, S.M., “Utilization of a Cartesian Grid Based Numerical Scheme in Analysis of Rotorcraft Flows,” International Conference on computational and Information Sciences – Aerospace Systems Engineering, Paper ID 612-474. Apr. 2009.

 

43.    Lee, J.D., Ruffin, S.M., “Solution of Turbulent Flow using a Cartesian Grid Based Numerical Scheme,” International Conference on computational and Information Sciences – Aerospace Systems Engineering, Paper ID 612-472. Apr. 2009.

 

44.    Pace, A., Bose, D., Ruffin, S.M., “A Loosely-Coupled Approach for Shock-Layer Radiation Modeling in DPLR,” AIAA Paper 2009-4312.

 

 

 

Conference and Seminar Presentations

 

1.       Ruffin, S.M., Murman, E., "Solution for Hypersonic Viscous Flow Over Delta Wings, "AIAA 26th Aerospace Sciences Meeting, Reno, NV, January 11, 1988.

 

2.       Ruffin, S.M., Venkatapathy, E., Keener, E.R., Nagaraj, N., "Computational Design Aspects of a NASP Nozzle/Afterbody Experiment," AIAA 27th Aerospace Sciences Meeting, Reno, NV, January 11, 1989.

 

3.       Ruffin, S.M., Venkatapathy, E., Feiereisen, W.J., Lee, S.H., "Progress in Computing Nozzle/Plume Flow Fields," Proceedings of the NASA Computational Fluid Dynamics Conference at NASA Ames, NASA Conf. Publication 10038, Vol. 2, March 1989.

 

4.       Ruffin, S.M., "Thermal Non-equilibrium in Converging-Diverging Nozzles," Stanford University, Stanford, CA, January 29, 1991.

 

5.       Ruffin, S.M., "Studies of Vibrational Relaxation in Expanding Flows," NASA Ames Research Center, Moffett Field, CA, March 20, 1991.

 

6.       Ruffin, S.M., Landrum, D.B., and Candler, G.V., "Vibrational Relaxation in Non-Equilibrium Flows," Army Boost Phase Signatures Meeting, NASA Ames Research Center, Moffett Field, CA, April 30, 1991.

 

7.       Ruffin, S.M., "Studies of Vibrational Relaxation in Expanding Flows," Physical Computing Conference of the American Physical Society, San Jose, CA, June 14, 1991.

 

8.       Ruffin, S.M., Venkatapathy, E., Lee, S.H., Keener, E.R., Spaid, F.W., "Single Expansion Ramp Nozzle Simulations," AIAA 30th Aerospace Sciences Meeting, Reno, NV, January 7, 1992.

 

9.       Ruffin, S.M., and Park, C., "Vibrational Relaxation of Anharmonic Oscillators in Expanding Flows," AIAA 30th Aerospace Sciences Meeting, Reno, NV, January 9, 1992.

 

10.    Ruffin, S.M., "Hypersonic Nozzle and Afterbody Flows," Georgia Institute of Technology, Atlanta, GA, July 1, 1992.

 

11.    Ruffin, S.M., "Reacting Expanding Flows," Aerophysics CFD Peer Review Meeting, NASA Ames Research Center, Moffett Field, CA, November 18, 1992.

 

12.    Ruffin, S.M., "Vibrational Energy Transfer of Diatomic Gases in Hypersonic Expanding Flows," Stanford University, Stanford, CA, May 10, 1993.

 

13.    Ruffin, S.M., "Prediction of Vibrational Relaxation in Hypersonic Expanding Flows," AIAA 32nd Aerospace Sciences Meeting, Reno, NV, January 13, 1994.

 

14.    Ruffin, S.M., "High Speed and High Temperature Research Program," External Advisory Council Meeting, Georgia Institute of Technology, Atlanta, GA, May 6, 1994.

 

15.    Ruffin, S.M., "Supersonic Channel Concept for Enhancement of Lift/Drag Ratio and Reduction of Heat Transfer," NASA-ASEE SummerFaculty Research Review, Moffett Field, CA, August 8, 1996.

 

16.    Ruffin, S.M, “Supersonic Channel-Airfoils for Reduced Drag,” AIAA 35th Aerospace Sciences Meeting, Reno, NV, January 8, 1997.

 

17.    Ruffin, S.M., "Slot-in-Wing Drag Reduction Technology," Univ. of Colorado, Boulder, CO., August 6, 1997.

 

18.    Ruffin, S.M., "Validation of a Nose Channel Concept for Supersonic Drag Reduction," NASA-ASEE Summer Faculty Research Review, Moffett Field, CA, August 7, 1997.

 

19.    Ruffin, S.M., “Application of Dynamic Slot Technology to Rotors for Dynamics Stall Elimination,” Georgia Institute of Technology, Atlanta, GA, November 4, 1999.

 

20.    Ruffin, S.M., “Investigation of Artificially Blunted Leading Edge Geometries with Curved Channels for High Speed Drag Reduction,” AIAA 38th Aerospace Sciences Meeting, Reno, NV January 13, 2000.

 

21.    Ruffin, S.M., “Comparison of Rotor-Airframe Interaction Predictions Utilizing Overset and Unstructured Grid Techniques,” AIAA 42nd Aerospace Sciences Meeting, Reno, NV January 5, 2004.

 

22.    Ruffin, S.M., “Systematic Channeling into Sloan PhD Programs,” A.P. Sloan Foundation Conference, November 4, 2004.

 

23.    Ruffin, S.M., “The Georgia Tech Recruitment and Retention Continuum,” American Society of Engineering Education Conference, Baton Rouge, LA, March, 2006.

 

24.    Ruffin, S.M., “Analysis of an Innovative Inward Turning Inlet Using an Air-JP8 Combustion Mixture at Mach 7,” AIAA Fluid Dynamics Conference June 2006.

 

25.    Ruffin, S.M., “Application of a Turbulent Viscous Cartesian-Grid Methodology to Flow Fields with Rotor-Fuselage Interaction,” AIAA Aerospace Sciences Meeting, Reno, NV, Jan. 2007.

 

26.    Ruffin, S.M., “Development of a Turbulent Wall-Function Based Viscous Cartesian-Grid Methodology,” AIAA Aerospace Sciences Meeting, Reno, NV, Jan. 2007.

 

27.    Ruffin, S.M., “Solution of Turbulent Flow using a Cartesian Grid Based Numerical Scheme,” International Conference on Computational and Information Sciences – Aerospace Systems Engineering,” Houston, TX, Apr. 2009.

 

28.    Ruffin, S.M., “Utilization of a Cartesian Grid Based Numerical Scheme in Analysis of Rotorcraft Flows,” International Conference on Computational and Information Sciences – Aerospace Systems Engineering,” Houston, TX, Apr. 2009.

 

Invited Seminars

 

1.       Ruffin, S.M., "The Importance of Science," ACSI State Science Fair, Decatur, GA, February 25, 1994.

 

2.       Ruffin, S.M., "Investing Wisely in Graduate School," Georgia Institute of Technology, Atlanta, GA, April 9, 1994.

 

3.       Ruffin, S.M., "Aerospace Engineering at Georgia Tech,” National Society of Black Engineers Ambassador's Day, Georgia Institute of Technology, Atlanta, GA, May 12, 1994.

 

4.       Ruffin, S.M., "Educating our Next Generation," NASA Ames Research Center AAAG, Black History Month Luncheon, Moffett Field, CA, February 7, 1995.

 

5.       Ruffin, S.M., “Molecular Vibration Modeling in High Speed Nozzles,” Univ. of Michigan, Ann Arbor, MI, December 7, 1995.

 

6.       Ruffin, S.M., “A Novel Concept for Enhancement of Lift/Drag Ratio on Hypersonic Vehicles,” NASA Ames Research Center, Moffett Field, CA August 7, 1996.

 

7.       Ruffin, S.M., “A Concept for Drag Reduction of Blunted Supersonic Vehicles,” NCA&T State University, Greensboro, NC, March 21, 1997.

 

8.       Ruffin, S.M. and Gupta, A., "Lift/Drag Enhancement and Aerothermo-dynamic Design of Supersonic Channel Vehicles," NASA Ames Research Center, Moffett Field, CA, August 14, 1997.

 

9.       Ruffin, S.M., "African Americans in Aerospace," Shule Mandela Academy, Palo Alto, CA, August 11, 1997.

 

10.    Ruffin, S.M., “High Speed Aerothermodynamic Performance Enhancement Using Artificially Blunted Leading Edges,” MIT, January 24, 2000.

 

11.    Ruffin, S.M., "Sonic Boom Fundamentals," MIT, March 2001.

 

12.    Ruffin, S.M., “Development of an Embedded Boundary Cartesian Grid Methodology for Complex Geometry and Viscous Flow Analysis,” Air Force Research Lab, August 12, 2004.

 

13.    Ruffin, S.M., “NASCART-GT: An Unstructured Cartesian Grid CFD Code,” Arnold Engineering Development Center (AEDC), December 14, 2006.

 

14.    Ruffin, S.M., “NASCART-GT: A Viscous Solution Adaptive Cartesian Grid Flow Solver,” CFD Research Corporation, February 8, 2008.

 

15.    Ruffin, S.M., “Viscous Cartesian Flow Solver with AMR Capabilities for automated Flow Simulation,” Naval Air Warfare Center Weapons Division, China Lake, CA, Feb. 2009.

 

SERVICE

 

Professional Contributions

 

1.       Member, American Institute of Aeronautics and Astronautics, 1989-present

2.       Speaker, NASA Educational Programs Office , 1989-1993

3.       Member, NASA Ames Equal Opportunity Council, 1988-1990

4.       Chairperson (Elected), NASA Ames African American Advisory Group, 1989-1990.

5.       Member, NASA Historically Black Colleges and Universities Research Center Selection Team, 1992

6.       Treasurer (Elected), NASA Ames African American Advisory Group, 1990-1993.

7.       Session Chairperson, AIAA Aerospace Science Meeting, 1995

8.       Member, NASA Education, Training and Lifelong Learning Review Panel, 1995

9.       Participant, ASEE Minority Faculty Development Forum, 1995

10.    Participant, 5th ASEE National Teaching Effectiveness Institute, 1995

11.    Workshop Coordinator, Mathematics in Physics and Aeronautics Pilot Program, Morehouse College, 1995

12.    Reviewer, AIAA Journal, 1988-1990

13.    Reviewer, Journal of Thermophysics and Heat Transfer, 1991-present

14.    Panel Member, NAE Decadal Survey of Civil Aeronautics, Aerodynamics and Acoustics Panel, 2005-2006.

 

Campus Contributions

1.       Member, Georgia Tech Fluid Mechanics Seminar Colloquium Committee, 1993-1994

2.       Faculty Representative, New Student Orientation sponsored by Georgia Tech Black Graduate Students Association, 1993

3.       Georgia Tech Black Graduate Students Association, 1993

4.       Member, Aerodynamics and Fluid Mechanics Discipline Committee, 1993-present

5.       Keynote Speaker at Graduate Student Colloquium sponsored by Georgia Tech Black Graduate Students Association, 1994

6.       Member, Aerodynamics and Fluid Dynamics Faculty Search Committee, 1994

7.       Faculty Advisor at AIAA Regional Student Conference, 1994.

8.       Speaker at Society of Black Engineers High School Ambassador's Day, 1994

9.       AE Faculty Representative, Georgia Tech College of Engineering, 1995-Present

10.    AE Representative (Elected), General Faculty Assembly, 1994 -1997

11.    Member, AE Graduate Committee, 1995-present

12.    Judge, Debate sponsored by Xi Alpha Chapter of Delta Sigma Theta Sorority, Inc., 1995

13.    Member, Undergraduate Enrollment Enhancement Committee, 1995-2004

14.    Participant, GTRI Mentor/Mentee Program, 1995-1996

15.    Member (Elected), AE Advisory Committee, 1995-present

16.    Facilitator, Georgia Tech LeaderShape Institute, 1997

17.    Workshop Coordinator, Univ. System of Ga. Leadership Development and Minority Recruitment Conference, 1997, 1998, 1999

18.    AE Faculty Representative, Focus Program sponsored by Georgia Tech College of Engineering, 1994-Present

19.    Member (Elected), Georgia Tech Honor Committee, 2003-present

20.    Member, COE Dean’s Faculty Advisory Committee, 2003-present

21.    Member, COE Dean’s Committee on Evaluation of Instruction (Peer Review of Teaching), 2003-2004

22.    Member, COE Promotion, Reappointment and Tenure Committee, 2002-2005

23.    Seminar Director, AE Brown Bag Lunch Seminar Series, 2005-present

24.    Faculty Advisor, Sigma Gamma Tau, 2006-Present

25.    Faculty Advisor, AE Student Advisory Committee, 2008-Present

26.    Chair, Aerodynamics and Fluid Mechanics discipline group, Georgia Tech School of AE, 2008-present

27.    Member, AE Space Systems Faculty Search Committee, 2007-Present

28.    Member, AE Structures, Materials, Aeroelasticity and Structural Dynamics Faculty Search Committee, 2008-Present

29.    Co-Chair, AE IT Director Search Committee, 2009

 

 

Consulting

1.       Barron, Inc., Design and analysis of jet eductors, 1995-1996

2.       Diamond Power Inc., Analysis and testing of soot blower nozzles, 1999-2002

3.       Sirius Technologies, Inc., Analysis of fuselage-mounted antenna, 2005-present

4.       Science and Technology Corporation, Numerical aerodynamic simulation, 2009-present

 

Professionally-Related Civic Activities

1.       Member, Executive Round Table, 1995-present

2.       Judge, ACSI State Science Fair, 1994, 1996

3.       Event Coordinator, Aerodynamics Aloft Competition in Science Olympiad State Tournament, 1995

 

 

HONORS AND AWARDS

 

1.       Consortium for Graduate Degrees for Minorities in Engineering (GEM) Fellowship, 1984-1987

2.       Nominee, Black Engineer of the Year - U.S. Black Engineer Magazine, 1991

3.       NASA Superior Performance Award, 1992

4.       NASA National Aerospace Plane CFD Validation Team Award, 1992

5.       NASA Historically Black Colleges & Universities Research Center Team Award, 1992

6.       NASA College Recruitment Award, 1993

7.       AIAA Best Thermophysics Paper Award, 1993

8.       CETL/Amoco Junior Faculty Teaching Excellence Award, 1997

9.       Meritor Inc. Faculty Excellence Award, 2000

10.    CETL Thank a Teacher Award, April 2008

11.    CETL Thank a Teacher Award, March 2009

12.    CETL Thank a Teacher Award, April 2009

13.    Hesburgh Award Teaching Fellow, 2010