ase & em | faculty

Paul D. Orkwis

Professor of Aerospace Engineering & Engineering Mechanics
PhD, 1990: North Carolina State University
Graduate Director

Office: 745B Baldwin Hall
Mailing address: P.O. Box 210070, Cincinnati, OH 45221-0070
Phone: (513) 556-3366
Fax: (513) 556-5038
Email: Paul dot Orkwis at uc dot edu
Website: Gas Turbine Simulation Laboratory

M, W, & F, 9:00 - 10:00 a.m.
and by appointment

• 20 AEEM 342 001 FND AERODYNAMICS, 05A
• 20 AEEM 456 001 APPL AERODYNAMICS, 06W
• 220 AEEM 456 001 APPL AERODYNAMICS, 06S

• Turbomachinery
• Automatic Feature Detection
• Computational Flow Physics
• Computational Fluid Dynamics
• Supersonic Flows
• Unsteady Flows
• Vortex Dominated Flows
• Lower Order Modeling

• Pes, M., Lukovic, B., Orkwis, P. and Turner, M., Modeling of Two Dimensional Synthetic Jet Unsteadiness Using Neural Network-Based Deterministic Source Terms, AIAA Paper 2003-2860, 32nd AIAA Fluid Dynamics Conference, St. Louis. MO, June 2002.
• Lukovic, B., Orkwis, P. and Turner, M., Modeling Unsteady Cavity Flows with Translating Walls, AIAA Paper 2002-3288, 32nd AIAA Fluid Dynamics Conference, St. Louis. MO, June 2002.
• Orkwis, P.D., Turner, M.G., and Barter, J.W., Linearized Unsteady Solution Based Deterministic Source Terms for Hot Streak Simulations, AIAA Journal of Propulsion and Power, Vol. 18. No. 2, March-April 2002, pp. 383-389.
• Lukovic, B., Orkwis, P., Turner, M. and Sekar, B., Effect of Cavity L/D Variations on Neural Network-Based Deterministic Unsteadiness Source Terms, AIAA Paper 2002-0857, 40th Aerospace Sciences Meeting, Reno, NV, January 2002.
• Sondak, D.L., Gupta, V., Orkwis, P.D. and Dorney, D.J., Effects of Blade Count on Hot Streak Clocking Simulations using Linearized and Nonlinear Methods, AIAA Paper 2001-3476, 37th AIAA/ ASME/ SAE/ ASEE Joint Propulsion Conference and Exhibit, Salt Lake City, UT, July 2001.
• Godavarty, D. and Orkwis, P.D., Investigating the Relationship Between Flow Field Saddles and Vortex Asymmetry, AIAA Paper 01-1034, 39th Aerospace Sciences Meeting, Reno, NV, January 2001.
• Gangwar, A., Lukovic, B., Orkwis, P.D. and Sekar, B., Modeling Unsteadiness in Steady Cavity Simulations, Part I: Parametric Solutions, AIAA Paper 01-0153, 39th Aerospace Sciences Meeting, Reno, NV, January 2001.
• Lukovic, B., Gangwar, A., Orkwis, P.D. and Sekar, B., Modeling Unsteadiness in Steady Cavity Simulations, Part II: Neural Network Modeling, AIAA Paper 01-0154, 39th Aerospace Sciences Meeting, Reno, NV, January 2001.
• Kimmel, R., Orkwis, P., Smith, D. and Lurie, E., Fluid Dynamics Enters the 21st Century, Aerospace America, Vol. 38, No. 11, November 2000.
• Kimmel, R., Orkwis, P., and Lurie, E., Aerospace Sciences, Fluid Dynamics, Air and Space '99, The Year in Review, Aerospace America, Vol. 37, No. 12, December 1999.
• Walker, B.K., Jeng, S.M., Orkwis, P.D., Slater, G.L., Khosla, P.K. and Simitses, G.J., Educating Aerospace Engineers for the Twenty-First Century: Results of a Survey, Journal of Engineering Education, Vol. 87, No. 4, October, 1998, pp. 481-487.
• Orkwis, P., Wlezien, R. and Kimmel, R., Aerospace Sciences, Fluid Dynamics, Air and Space '98, The Year in Review, Aerospace America, Vol. 36, No. 12, December 1998, pp. 20-21.
• Orkwis, P.D., Sekar, B., Chakravarthy, S. and Peroomian, O., Comparison of Three Navier-Stokes Equation Solvers for Supersonic Open Cavity Simulations, AIAA Journal, Vol. 36, No. 5, May 1998, pp. 865-866.
• Disimile, P.J. and Orkwis, P.D., Sound Pressure Level Variations in a Supersonic Rectangular Cavity at Yaw, AIAA Journal of Propulsion and Power, Vol. 14, No. 3, May-June 1998, pp. 392-398.
• Orkwis, P.D., Sengupta, R. and Davis, S.M., Flow Field Saddles and Their Relationship to Vortex Asymmetry, Computers & Fluids, Vol. 26, No. 5, September-October 1997, pp. 505-524.
• Disimile, P.J. and Orkwis, P.D., The Effect of Yaw on the Frequency of Pressure Oscillations within a Rectangular Cavity at Mach 2, AIAA Journal, Vol. 35, No. 7, July 1997, pp. 1233-1235.
• Tam, C. -J., Orkwis, P. D. and Disimile, P. J., Algebraic Turbulence Model Simulations of Supersonic Open Cavity Flow Physics, AIAA J., Vol. 34, No. 11, November 1996, pp. 2255-2260.
• Sengupta, R. and Orkwis, P. D., Proving Algorithm Symmetry for Flows Exhibiting Symmetry-Breaking, AIAA J., Vol. 34, No. 10, October 1996, pp. 2193-2195.
• Vanden , K.J. and Orkwis, P.D., A Comparison of Numerical and Analytical Jacobians , AIAA J., Vol. 34, No. 6, June 1996, pp. 1125-1130.
• Dusing, D. W. and Orkwis, P. D., Numerical Issues Affecting Vortex Asymmetries Computed with the Conical Navier-Stokes Equations, Computers & Fluids, Vol. 25, No. 3, May-June 1996, pp. 319-334.
• Tam, C-J., Orkwis, P.D. and Disimile, P.J., A Comparison of Baldwin- Lomax Turbulence Models for 2-D Open Cavity Computations, AIAA J., Vol. 34, No. 3, March 1996, pp. 629-631
• Dailey, L.D. , Jennions, I.K. and Orkwis, P.D., Simulating Laminar- Turbulent Transition with a Low Reynolds Number Turbulence Model in a Navier-Stokes Flow Solver, J. of Prop. & Power, Vol. 11, No. 6, November-December 1995, pp. 1187-1194.
• Orkwis, P.D., Tam, C.-J. and Disimile , P.J., Observations on Using Experimental Data as Boundary Conditions for Computations, AIAA J., Vol. 33, No. 1, January 1995, pp. 176-178.
• Orkwis, P.D. and George, J.H., A Comparison of CGS Preconditioning Methods for Newton's Method Solvers, Neural, Para. & Sci. Comp., Vol. 2, No. 2, June 1994.
• Orkwis, P.D., A Comparison of Newton's and Quasi-Newton's Method Solvers for the Navier-Stokes Equations, AIAA J., Vol. 31, No. 5, May 1993, pp. 832-836.
• Orkwis, P.D. and McRae, D.S., A Newton's Method Solver for the Axisymmetric Navier-Stokes Equations, AIAA J., Vol. 30, No. 6, June 92, pp. 1507-1514.
• Orkwis, P.D. and McRae, D.S., A Newton's Method Solver for High-Speed Viscous Separated Flow Fields, AIAA J., Vol. 30, No. 1, January 1992, pp. 78-85.

• Winner, 2001 ASME Joint Propulsion Conference Best Paper Award, authored by D.L. Sondak, V. Gupta, P.D. Orkwis, and D.J. Dorney, "Effects of Blade Count on Hot Streak Clocking Simulations Using Linearized and Nonlinear Methods," AIAA Paper 2001-3476, 37th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Salt Lake City, Utah, July 2001.
• Member: AIAA (Associate Fellow), ASME, Sigma Xi, Ohio Aerospace Institute, Dayton Area Graduate Studies Institute, AIAA Fluid Dynamics Technical Committee, ASME Turbomachinery Technical Committee, ASME International Gas Turbine Institute, International Society for Air Breathing Engines, AIAA Dayton-Cincinnati Council-Member at Large, AIAA Congressional Visits Day-Team Ohio
• Reviewer: AIAA Journal, AIAA Journal of Propulsion and Power, AIAA Journal of Thermophysics and Heat Transfer, ASME International Gas Turbine Institute, Computers and Fluids, International Journal of CFD, SIAM Review, ASME Journal of Fluids Engineering, Arabian Journal of Science and Engineering