Geogria Institute of Technology

Faculty Profile

Stephen M. Ruffin

Stephen M. Ruffin

Associate Professor

Office: Guggenheim 362
Phone: 404.894.8200
Fax: 404.894.2760
stephen.ruffin@aerospace.gatech.edu
http://www.ae.gatech.edu/~sruffin/

Education

  • B.S., Mechanical and Aerospace Engineering, Princeton University, 1985.
  • M.S., Aeronautics and Astronautics, Massachusetts Institute of Technology, 1987.
  • Ph.D., Aeronautics and Astronautics, Stanford University, 1993.

Biography

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.

Research

Computational Fluid Dynamics (CFD) with applications in the following areas:

  • Propulsion/airframe integration
  • Planetary entry aerothermodynamics
  • Cartesian grid based CFD methodologies
  • Rotor/fuselage interaction
  • Store separation
  • Computation of high speed flows in thermo-chemical non-equilibrium
  • Drag reduction methods for low-speed and supersonic flight
  • Scramjet inlet and exhaust nozzles

Honors and Distinctions

  • Consortium for Graduate Degrees for Minorities in Engineering (GEM) Fellowship, 1984-1987
  • Nominee, Black Engineer of the Year - U.S. Black Engineer Magazine, 1991
  • NASA Superior Performance Award, 1992
  • NASA National Aerospace Plane CFD Validation Team Award, 1992
  • NASA Historically Black Colleges & Universities Research Center Team Award, 1992
  • NASA College Recruitment Award, 1993
  • AIAA Best Thermophysics Paper Award, 1993
  • CETL/Amoco Junior Faculty Teaching Excellence Award, 1997
  • Meritor Inc. Faculty Excellence Award, 2000
  • CETL Thank a Teacher Award, April 2008, March 2009, April 2009
  • Hesburgh Award Teaching Fellow, 2010
  • Selected Publications

  • 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.
  • Lee, J.D., Ruffin, S.M., “Development of a Turbulent Wall-Function Based Viscous Cartesian-Grid Methodology,” AIAA Paper 2007-1326, Jan. 2007.
  • Pace, A., Bose, D., Ruffin, S.M., “A Loosely-Coupled Approach for Shock-Layer Radiation Modeling in DPLR,” AIAA Paper 2009-4312.
  • Lee, Jinwook, Orsini, A., and Ruffin, S.M., “Unstructured Cartesian-Grid Methodology for Non-equilibrium Hypersonic Flows,” Journal of Thermophysics and Heat Transfer, Vol. 24, No. 1, Jan-Mar 2010.
  • 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
  • hpep lab

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    Prof. Mitchell Walker in the High-Power Electric Propulsion Lab

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