Christopher John Roy
Christopher John Roy, Ph.D.
215 Randolph Hall
Virginia Tech
Blacksburg, Virginia 24061-0203
Phone: (540) 231-6611
E-mail: cjroy@vt.edu
Web Site:
Citizenship: USA
Research Interests
Computational Fluid Dynamics, Verification and Validation, Numerical Error Estimation, Microscale Gas Flows, Large Eddy Simulation, Turbulence Modeling, Combustion, Propulsion, Gas Dynamics, Nonequilibrium Flows
Education
Doctor of Philosophy, Aerospace Engineering, Minor in Mathematics, December 1998
North Carolina State University, Raleigh, North Carolina
Dissertation Title: “A Computational Study of Turbulent Reacting Flowfields for Scramjet Applications”
Master of Science, Aerospace Engineering, December 1994
Texas A&M University, College Station, Texas
Thesis Title: “Viability of the Diagonal Implicit Algorithm for Hypersonic Flowfields with Finite-Rate Chemistry”
Bachelor of Science, Mechanical Engineering and Materials Science, May 1992
Duke University, Durham, North Carolina
Experience
August 2007 – Present
Associate Professor, Aerospace and Ocean Engineering Department, Virginia Tech, Virginia
August 2003 – August 2007
Assistant Professor, Aerospace Engineering Department, Auburn University, Alabama.
Also served as modeling and simulation coordinator for the Auburn University Peak of Excellence in Transportation.
September 1998 – July 2003
Senior Member of Technical Staff, Sandia National Laboratories, Albuquerque, New Mexico.
Member of a $2M research and development team focused on compressible fluid mechanics for subsonic, transonic, and hypersonic flows. Conducted research into turbulence and transition modeling for high-speed flows. Developed and applied numerical error estimation techniques for use in the validation of compressible fluid dynamics simulations. Performed massively-parallel three-dimensional numerical simulations of tractor/trailer aerodynamics on the ASCI Red (Teraflops) computing platform. Point of contact for university research contracts.
August 1994 - September 1998
Research Assistant, Mechanical and Aerospace Engineering Department, North Carolina State University. Performed research in the numerical modeling of turbulent combustion for scramjet propulsion and industrial burner applications. Profs. Jack Edwards and D. Scott McRae served as academic advisors and financial support was provided by the Air Force Office of Scientific Research and the Environmental Protection Agency.
August 1997 - December 1997
Mentored Teaching Assistant, Boundary Layer Theory, Mechanical and Aerospace Engineering Department, North Carolina State University. Taught one-half of the junior-level class lectures, developed tests, and graded homework in the university-sponsored Mentored Teaching Assistantship program under the mentorship of Prof. Fred DeJarnette.
July 1995 - August 1995
Instructor, Engineering Fluid Mechanics, Mechanical and Aerospace Engineering Department, North Carolina State University. Fully responsible for syllabus preparation and planning, lectures, review sessions, test development, and grading.
May 1995 - June 1995
Instructor, Engineering Thermodynamics, Mechanical and Aerospace Engineering Department, North Carolina State University. Fully responsible for syllabus preparation and planning, lectures, review sessions, test development, and grading.
Honors and Awards
Presidential Early Career Award for Scientists and Engineers, received in a ceremony at the White House, July 26, 2006
Associate Fellow, American Institute of Aeronautics and Astronautics (AIAA), 2006
Alumni Engineering Council Research Award, Junior Faculty, Samuel Ginn College of Engineering, Auburn University, March 2005
NASA Group Achievement Award for contributions in Aerothermodynamics, 2004
Nova Award for contributions to the Space Shuttle Columbia accident investigation team, Lockheed Martin, 2004
Employee Recognition Award for outstanding contributions to the B61 jet-fin interaction team, Sandia National Laboratories, March 2001
Sandia Award for Excellence for outstanding technical work at the Reno AIAA conference, Sandia National Laboratories, January 2001
Sandia Award for Excellence for outstanding contributions in the area of numerical error estimation, Sandia National Laboratories, July 2000
Sandia Award for Excellence for outstanding contributions to the B61 jet-fin interaction team, Sandia National Laboratories, February 2000
Fred J. Benson Graduate Fellowship in Engineering, Texas A&M University, 1992-93
Dean’s List with Distinction, Duke University, 1991-92
Teaching Awards
Student Government Association Outstanding Faculty Member Award for the Samuel Ginn College of Engineering, Auburn University, April 2005
Fred H. Pumphrey Teaching Award, Samuel Ginn College of Engineering, Auburn University, March 2005
Outstanding Faculty Member Award in the Department of Aerospace Engineering, Auburn University, March 2005
Courses Taught
Undergraduate Level
• AE 4140 Aerodynamics III: Boundary Layer Theory, Auburn University, Fall 2003-Fall 2006
• AE 4970 Introduction to Computational Fluid Dynamics, Auburn University, Spring 2004-Spring 2007
• MAE 301 Engineering Thermodynamics I, North Carolina State University, Summer 1995
• MAE 305 Mechanical Engineering Laboratory I, North Carolina State University, Fall 1994
• MAE 306 Mechanical Engineering Laboratory II, North Carolina State University, Spring 1995
• MAE 308 Fluid Mechanics, North Carolina State University, Summer 1995
• MAE 455 Boundary Layer Theory, North Carolina State University, Fall 1997
Graduate Level
• AE 7970 Introduction to Computational Fluid Dynamics, Auburn University, Spring 2004-Spring 2007
• AE 7140 Advanced Computational Fluid Dynamics, Fall 2004-Fall 2006
New Courses Developed
AE 4970/7970 Introduction to Computational Fluid Dynamics: Course consists of more than 400 PowerPoint slides combined with derivations and examples worked out on the blackboard. The objectives of this course are to: 1) address the fundamental issues in the numerical discretization of the partial differential equations governing fluid flow and 2) present basic numerical schemes and analysis methods for solving the Euler and Navier-Stokes equations. Topics discussed include: governing equations for fluid dynamics, mathematical character of the equations, finite-difference methods, explicit solution methods, compressible flows, incompressible flows, pressure correction method, verification of CFD codes and solutions.
AE 7140 Advanced Computational Fluid Dynamics: The objectives of this course are to present the student with advanced methods for solving problems in computational fluid dynamics. While this course focuses on the finite-volume method, finite-difference and finite-element methods are also covered. Topics discussed include: implicit solution techniques, multigrid methods, curvilinear coordinates, characteristic decomposition, and upwind schemes.
Professional Short Courses
Verification and Validation in Computational Simulation: This is a two day professional short course sponsored by the American Institute of Aeronautics and Astronautics. This course is co-instructed by Dr. William Oberkampf, an AIAA Fellow and Distinguished Member of Technical Staff at Sandia National Laboratories in Albuquerque, New Mexico.
Course Description: Verification and validation are a set of procedures designed to build confidence in computational simulation by establishing the numerical accuracy of a simulation (verification) and the physical accuracy of the models employed (validation). Here computational simulation is defined as any application which involves the numerical solution to partial differential equations such as computational fluid dynamics, structural dynamics, structural mechanics, thermal analysis, etc. The course materials consist of approximately 300 PowerPoint slides developed by the instructors. This course has been taught or is scheduled at the following locations:
• AIAA Aerospace Sciences Meeting, Reno, Nevada, January 3-4, 2004
• Air Force Research Laboratory, Air Vehicles Directorate, Wright-Patterson Air Force Base, Ohio, March 24-25, 2004
• National Institute of Aerospace, Hampton, Virginia, June 7-8, 2004
• Moldflow Corporation, Ithaca, New York, July 22-23, 2004
• National Institute of Aerospace, Hampton, Virginia, August 2-3, 2004
• NASA Langley Research Center, Hampton, Virginia, December 16-17, 2004
• NASA Langley Research Center, Hampton, Virginia, March 31-April 1, 2005
• AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conf., April 16-17, 2005
• NASA Langley Research Center, Hampton, Virginia, August 4-5, 2005
• National Institute of Aerospace, Hampton, Virginia, November 17-18, 2005
• AIAA Aerospace Sciences Meeting, Reno, Nevada, January 7-8, 2006
• National Institute of Aerospace, Hampton, Virginia, March 30-31, 2006
• NASA Ames Research Center, Mountain View, California, June 29-30, 2006
• NASA Marshall Space Flight Center, Huntsville, Alabama, October 23-34, 2006
• AIAA Aerospace Sciences Meeting, Reno, Nevada, January 6-7, 2007
• Sandia National Laboratories, Livermore, California, March 1-2, 2007
• The Boeing Company, Bellevue, Washington, July 9-10, 2007
• NASA Johnson Space Center, Houston, Texas, July 16-17, 2007
• Sandia National Laboratories, Albuquerque, New Mexico, September 10-11, 2007
• AIAA Fluid Dynamics Meeting, Seattle, Washington, June 26-27, 2008
Academic Committees
University Committees: Auburn University
• Academic Computing Committee, August 15, 2004 – August 15, 2007
Samuel Ginn College of Engineering Committees: Auburn University
• Graduate Student Recruitment Committee, April 2007 – present
Departmental Committees: Aerospace Engineering Department, Auburn University
• Departmental Research Committee, Chair, September 2006 – present
• Publicity/Recruiting Committee, Chair, November 2005 – present
• Woltosz Graduate Fellowship Committee, Chair, February 2007 – present
• Graduate Program Committee, August 2004 – present
• Facilities and Equipment Committee, August 2004 – present
• Departmental Computer Committee, August 2004 – present
• Curriculum Committee, August 2004 – present
• Scholarship Committee, August 2004 – present
Professional Activities
Technical Program Chair, 18th AIAA Computational Fluid Dynamics Conference, Miami, Florida, June 2007
Conference Organizing Committee, The Aerodynamics of Heavy Vehicles II: Trucks, Buses, and Trains, Lake Tahoe, California, August 2007
National Academy of Engineering, German-American Frontiers of Engineering Symposium Invited Attendee, Symposium held at Lucent Technologies, Murray Hill, New Jersey, May 2006
Chair, Computational Fluid Dynamics Subcommittee, AIAA Fluid Dynamics Technical Committee, 2006-present
Faculty Co-Advisor, AIAA Student Chapter, Auburn University, November 2005-August 2006
Chair, 2nd Bi- annual CFD Student Paper Competition, Miami, Florida, June 2007
Co-chair, 1st Bi-annual CFD Student Paper Competition, Toronto, Canada, June 2005
Contributed to Institute for Defense Analysis study on Technology Readiness Levels for CFD, January 2005
Invited Panelist, Panel Discussion on Verification and Validation, ICHMT International Symposium on Advances in Computational Heat Transfer, Norway, April 19-24, 2004
Invited Panelist, Panel Discussion on Uncertainty in CFD, 41st AIAA Aerospace Sciences Meeting, Reno, Nevada, January 6-9, 2003
Organized Special Sessions on Tractor-Trailer Aerodynamics, 25th AIAA Applied Aerodynamics Conference, San Francisco, California, June 2006 and 34th AIAA Fluid Dynamics Meeting, Portland, Oregon, June 2004
Session Chair at 20+ AIAA Conferences
AIAA Fluid Dynamics Technical Committee (FDTC), Member, 2003-Present
AIAA Committee on Standards in CFD, Member, 2003-Present
Secretary, Transition Study Group, AIAA Fluid Dynamics Technical Committee Working Group, 2001-2003
Professional Society Memberships
American Institute of Aeronautics and Astronautics (AIAA), Associate Fellow
American Society of Mechanical Engineers (ASME), Member
Programmatic and Scholarly Reviews
External Reviewer, National Research Council Review of NASA’s Capability Roadmaps in Modeling and Simulation and in Systems Engineering, Washington, D.C., April 5-7, 2005
External Reviewer, NASA Space Shuttle Return to Flight (RTF): Orbiter Smooth OML CFD Database, via telecon, April 14-28, 2005
External Reviewer, NASA Space Shuttle Return to Flight (RTF): CFD-Based Traceability Study for Tile Cavity Heating Augmentation, via telecon, April 28-May 12, 2005
Reviewer for the following journals, conferences, book publishers, and organizations:
• AIAA Journal
• Aerospace Science and Technology
• International Journal of Computational Fluid Dynamics
• International Journal for Numerical Methods in Fluids
• Journal of Aerospace Computing, Information, and Communication
• Journal of Aircraft
• Journal of Fluids and Structures
• Journal of Microelectromechanical Systems
• Journal of Spacecraft and Rockets
• Journal of Thermophysics and Heat Transfer
• AIAA Aerospace Sciences Meeting
• AIAA Computational Fluid Dynamics Conference
• AIAA Fluid Dynamics Conference
• ASME Heat Transfer/Fluids Engineering Conference
• Cambridge University Press
• National Science Foundation
Publications in Refereed Scientific Journals
Articles Printed
1. J. R. Edwards and C. J. Roy, “Preconditioned Multigrid Methods for Two-Dimensional Combustion Calculations at All Speeds,” AIAA Journal, Vol. 36, No. 2, Feb. 1998, pp. 185-192.
2. C. J. Roy and J. R. Edwards, “Numerical Simulation of a Three-Dimensional Flame/Shock Wave Interaction,” AIAA Journal, Vol. 38, No. 5, May 2000, pp. 745-754.
3. C. J. Roy and F. G. Blottner, “Assessment of One- and Two-Equation Turbulence Models for Hypersonic Transitional Flows,” Journal of Spacecraft and Rockets, Vol. 38, No. 5, Sept.-Oct. 2001, pp. 699-710.
4. J. R. Edwards, C. J. Roy, F. G. Blottner, and H. A. Hassan, “Development of One-Equation Transition/Turbulence Models,” AIAA Journal, Vol. 39, No. 9, Sept. 2001, pp. 1691-1698.
5. C. J. Roy and F. G. Blottner, “Methodology for Turbulence Model Validation: Application to Hypersonic Transitional Flows,” Journal of Spacecraft and Rockets, Vol. 40, No. 3, May-June 2003, pp. 313-325.
6. C. J. Roy, M. A. Gallis, T. J. Bartel, and J. L. Payne, “Navier-Stokes and DSMC Predictions for Laminar Hypersonic Shock-Induced Separation,” AIAA Journal, Vol. 41, No. 6, June 2003, pp. 1055-1063.
7. C. J. Roy, “Grid Convergence Error Analysis for Mixed-Order Numerical Schemes,” AIAA Journal, Vol. 41, No. 4, April 2003, pp. 595-604.
8. C. J. Roy, M. A. McWherter-Payne, and W. L. Oberkampf, “Verification and Validation for Laminar Hypersonic Flowfields Part 1: Verification,” AIAA Journal, Vol. 41, No. 10, 2003, pp. 1934-1943.
9. C. J. Roy, W. L. Oberkampf, and M. A. McWherter-Payne, “Verification and Validation for Laminar Hypersonic Flowfields Part 2: Validation,” AIAA Journal, Vol. 41, No. 10, 2003, pp. 1944-1954.
10. C. J. Roy, C. C. Nelson, T. M. Smith, and C. C. Ober, “Verification of Euler / Navier-Stokes Codes using the Method of Manufactured Solutions,” International Journal for Numerical Methods in Fluids, Vol. 44, No. 6, 2004, pp. 599-620.
11. C. J. Roy, “Review of Code and Solution Verification Procedures for Computational Simulation,” Journal of Computational Physics, Vol. 205, No. 1, 2005, pp. 131-156 (REVIEW ARTICLE).
12. C. J. Roy, J. L. Payne, and M. A. McWherter-Payne, “RANS Simulations of a Simplified Tractor/Trailer Geometry,” ASME Journal of Fluids Engineering, Vol. 128, No. 5, 2006, pp. 1083-1089.
13. M. A. Barone and C. J. Roy, “Evaluation of Detached Eddy Simulation for Turbulent Wake Applications,” AIAA Journal, Vol. 44, No. 12, 2006, pp. 3062-3071.
14. C. J. Roy, A. Raju, and M. M. Hopkins, “Estimation of Discretization Errors using the Method of Nearby Problems,” AIAA Journal, Vol. 45, No. 6, 2007, pp. 1232-1243.
15. C. J. Roy and F. G. Blottner, “Review and Assessment of Turbulence Models for Hypersonic Flows,” Progress in Aerospace Sciences, Vol. 42, 2006, pp. 469-530 (REVIEW ARTICLE).
Articles In Review
1. R. Duggirala, C. J. Roy, S. M. Saeidi, J. Khodadadi, D. Cahela, and B. Tatarchuck, “Pressure Drop Predictions for Microfibrous Flows using CFD,” manuscript submitted to ASME Journal of Fluids Engineering, February 2007.
Articles In Preparation
1. H. Ghuge, C. J. Roy, and M. Barone, “Detached Eddy Simulations of the Flow over a Generic Tractor Trailer,” manuscript in preparation for submittal to the ASME Journal of Fluids Engineering.
2. P. Veluri, C. J. Roy, R. Rifki, J. C. Worley, and A. Ahmed, “Joint Computational and Experimental Study of a Simplified Tractor-Trailer,” manuscript in preparation for submittal to the ASME Journal of Fluids Engineering.
3. C. J. Roy, C. J. Heintzelman, and S. J. Roberts, “Estimation of Numerical Error for 3D Inviscid Flows on Unstructured Grids,” manuscript in preparation for submission to the AIAA Journal.
4. J. Doyle, R. Hartfield, and C. J. Roy, “Tractor-Trailer Drag Optimization by a Genetic Algorithm with CFD,” manuscript in preparation for submission to the AIAA Journal.
Invited Conference Papers
1. C. J. Roy and M. M. Hopkins, “Discretization Error Estimates using Exact Solutions to Nearby Problems,” AIAA 2003-0629, invited paper for session on Uncertainty in CFD, Reno, NV, Jan. 6-9, 2003.
2. C. J. Roy, “Verification of Codes and Solutions in Computational Simulation,” Proceedings of Computational Heat Transfer 2004, ICHMT International Symposium on Advances in Computational Heat Transfer, Norway, April 19-24, 2004.
3. C. J. Roy, W. L. Oberkampf, and S. J. Beresh, “A Test Case in Compressible Aerodynamics,” Verification and Validation of Computer Models for Design and Performance Evaluation of High-Consequence Engineering Systems, National Institute of Standards and Technology, Gaithersburg, MD, November 8-9, 2004.
Invited Lectures
1. C. J. Roy, “Code and Solution Verification Procedures in Computational Simulation,” Verification Workshop, Sandia National Laboratories, Albuquerque, New Mexico, March 16-17, 2005.
2. C. J. Roy, R. K. Duggirala, J. M. Khodadadi, S. M. Saeidi, B. Tatarchuk, D. Cahela, and R. Kalluri, “Understanding the Anomalous Heterogeneous Reactivity of Microfibrous Entrapped Media Using CFD and Microfluidic Simulations,” Auburn Engineering Alumni Council, Auburn University, September 22, 2005.
3. C. J. Roy, “Simulating Flow through Microfibrous Materials using Computational Fluid Dynamics (CFD),” Auburn University Chemical Engineering Department, Auburn University, October 5, 2005.
4. C. J. Roy, “Verification and Validation in Computational Fluid Dynamics,” North Carolina State University, October 9, 2006.
5. C. J. Roy, “Aerodynamic Drag Reduction Opportunities for Tractor-Trailers,” 2006 Fall Innovation and Business Partnership Forum, Opelika, Alabama, November 3, 2006.
6. C. J. Roy, “Verification and Validation in Computational Simulation,” Auburn University Civil Engineering Department, Auburn University, November 15, 2006.
7. C. J. Roy, “Verification and Validation in Computational Fluid Dynamics,” Duke University, March 20, 2007.
8. C. J. Roy, “Verification and Validation in Computational Fluid Dynamics,” Virginia Polytechnic Institute and State University, March 28, 2007.
Publications in Conference Proceedings
Refereed (Full Paper)
1. C. J. Roy and J. R. Edwards, “Bluff-Body Stabilized Flame Calculations with the k-( Two-Equation Turbulence Model,” AIAA Paper 98-0252, Reno, NV, Jan. 12-15, 1998.
2. C. J. Roy and J. R. Edwards, “Flame Stabilization Effects in Supersonic Turbulent Combustion,” AIAA Paper 98-3210, Cleveland, OH, July 13-15, 1998.
3. C. J. Roy and F. G. Blottner, “Assessment of One- and Two-Equation Turbulence Models for Hypersonic Transitional Flows,” AIAA Paper 2000-0132, Reno, NV, Jan. 10-13, 2000.
4. J. R. Edwards, C. J. Roy, F. G. Blottner, and H. A. Hassan, “Development of One-Equation Transition / Turbulence Models,” AIAA Paper 2000-0133, Reno, NV, Jan. 10-13, 2000.
5. C. J. Roy, M. A. McWherter-Payne, and W. L. Oberkampf, “Verification and Validation for Laminar Hypersonic Flowfields,” AIAA Paper 2000-2550, Denver, CO, June 19-22, 2000.
6. C. J. Roy, T. J. Bartel, M. A. Gallis, and J. L. Payne, “DSMC and Navier-Stokes Predictions for Hypersonic Laminar Interacting Flows,” AIAA Paper 2001-1030, Reno, NV, Jan. 8-11, 2001.
7. C. J. Roy and F. G. Blottner, “Further Assessment of One- and Two-Equation Turbulence Models for Hypersonic Transitional Flows,” AIAA Paper 2001-0210, Reno, NV, Jan. 8-11, 2001.
8. J. L. Payne, C. J. Roy, and S. J. Beresh, “A Comparison of Turbulence Models for a Supersonic Jet in Transonic Crossflow,” AIAA Paper 2001-1048, Reno, NV, Jan. 8-11, 2001.
9. P. E. DesJardin, T. M. Smith, and C. J. Roy, “Numerical Simulations of a Methanol Pool Fire,” AIAA Paper 2001-0636, Reno, NV, Jan. 8-11, 2001.
10. C. J. Roy, “Grid Convergence Error Analysis for Mixed-Order Numerical Schemes,” AIAA Paper 2001-2606, Anaheim, CA, June 11-14, 2001.
11. C. J. Roy, M. A. Gallis, J. L. Payne, and T. J. Bartel, “Navier-Stokes and DSMC Simulations for Hypersonic Laminar Shock-Shock Interaction Flows,” AIAA Paper 2002-0737, Reno, NV, Jan. 14-17, 2002.
12. C. J. Roy, T. M. Smith, and C. C. Ober, “Verification of a Compressible CFD Code using the Method of Manufactured Solutions,” AIAA Paper 2002-3110, St. Louis, MO, June 24-26, 2002.
13. J. L. Payne, C. J. Roy, and S. J. Beresh, “Navier-Stokes Simulations of a Supersonic Jet in Transonic Crossflow: Comparison to Surface Data,” AIAA Paper 2002-3114, St. Louis, MO, June 24-26, 2002.
14. M. A. Gallis, C. J. Roy, T. J. Bartel, and J. L. Payne, “Simulation of Hypersonic Laminar Flow Validation Experiments,” Proceedings of the 23rd Rarefied Gas Dynamics Symposium, Whistler, British Columbia, July 20-25, 2002.
15. C. J. Roy, J. L. Payne, M. A. McWherter-Payne, and K. Salari, “RANS Simulations of a Simplified Tractor/Trailer Geometry,” Lecture Notes in Applied and Computational Mechanics, Vol. 19: The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains, R. McCallen, F. Browand, and J. Ross, Eds., United Engineering Foundation, 2004, pp. 207-218.
16. C. J. Roy, L. J. DeChant, J. L. Payne, and F. G. Blottner, “Bluff-Body Flow Simulations using Hybrid RANS/LES,” AIAA Paper 2003-3889, Orlando, FL, June 2003.
17. C. C. Nelson and C. J. Roy, “Verification of the Wind-US CFD Code using the Method of Manufactured Solutions,” AIAA Paper 2004-1104, Reno, NV, Jan. 2004.
18. C. J. Roy, J. C. Brown, L. J. DeChant, and M. A. Barone, “Unsteady Turbulent Flow Simulations of the Base of a Generic Tractor/Trailer,” AIAA Paper 2004-2255, 34th AIAA Fluid Dynamics Meeting, Portland, OR, June 2004.
19. R. C. McCallen, K. Salari, J. M. Ortega, L. J. DeChant, B. Hassan, C. J. Roy, W. D. Pointer, F. Browand, M. Hammache, T.-Y. Hsu, A. Leonard, M. Rubel, P. Chatalain, R. Englar, J. Ross, D. Satran, J. T. Heineck, S. Walker, D. Yaste, and B. Storms, “DOE’s Effort to Reduce Truck Aerodynamic Drag – Joint Experiments and Computations Lead to Smart Design,” AIAA Paper 2004-2249, 34th AIAA Fluid Dynamics Meeting, Portland, OR, June 2004.
20. M. M. Hopkins and C. J. Roy, “Introducing the Method of Nearby Problems,” European Congress on Computational Methods in Applied Sciences and Engineering, P. Neittaanmaki, T. Rossi, S. Korotov, E. Onate, J. Periaux, and D. Knorzer (eds.), Jyvaskyla, Finland, July 2004.
21. A. Raju, C. J. Roy, and M. M. Hopkins, “On the Generation of Exact Solutions using the Method of Nearby Problems,” AIAA Paper 2005-0684, Reno, NV, Jan. 2005.
22. M. A. Barone and C. J. Roy, “Evaluation of Detached Eddy Simulation for Turbulent Wake Applications,” AIAA Paper 2005-0504, Reno, NV, Jan. 2005.
23. A. Raju, C. J. Roy, and M. M. Hopkins, “Evaluation of Discretization Error Estimators using the Method of Nearby Problems,” AIAA Paper 2005-4993, 17th AIAA CFD Conference, Toronto, Ontario, Canada, June 2005.
24. R. Duggirala, C. J. Roy, S. M. Saeidi, J. Khodadadi, D. Cahela, and B. Tatarchuck, “Pressure Drop Predictions for Microfibrous Flows using CFD,” AIAA Paper 2005-4618, 17th AIAA CFD Conference, Toronto, Ontario, Canada, June 2005.
25. C. J. Roy and F. G. Blottner, “Review and Assessment of Turbulence Models for Hypersonic Flows: 2D/Axisymmetric Cases,” AIAA Paper 2006-0713, Reno, NV, Jan. 2006.
26. H. A. Ghuge and C. J. Roy, “Preliminary Detached Eddy Simulations of a Generic Tractor/Trailer,” AIAA Paper 2006-3858, San Francisco, CA, June 2006.
27. S. P. Veluri, C. J. Roy, A. Ahmed, and R. Rifki, “Preliminary RANS Simulations and Experimental Study of a Tractor/Trailer Geometry,” AIAA Paper 2006-3857, San Francisco, CA, June 2006.
28. J. Doyle, R. Hartfield, and C. J. Roy, “Tractor Trailer Drag Optimization by a Genetic Algorithm with CFD,” AIAA Paper 2006-3863, San Francisco, CA, June 2006.
29. H. Yang, R. Kalluri, D. Kennedy, R. Sothen, E. Luna, S. Nair, D. Cahela, R. Duggirala , C. J. Roy, and B. J. Tatarchuk, “Microstructured Reaction Media for Logistic Fuel Processing: Materials and Methodologies to Achieve Miniaturization and Process Intensification,” 6th Annual Logistic Fuel Processing Conference, Panama City Beach, FL, May 16-17, 2006.
30. R. Duggirala, C. J. Roy, H. Yang, R. Kalluri, D. Cahela, and B. J. Tatarchuk, “Simulation of Heterogeneous H2S Catalysis in Microscale Gas Flows,” International Symposium on Fuel processing for Hydrogen Production, American Chemical Society Meeting and Exposition, San Francisco, CA, September 10-14, 2006.
31. C. J. Roy, C. J. Heintzelman, and S. J. Roberts, “Estimation of Numerical Error for 3D Inviscid Flows on Cartesian Grids,” AIAA Paper 2007-0102, Reno, NV, Jan. 2007.
32. C. J. Roy, E. Tendean, S. P. Veluri, R. Rifki, S. Hebert, and E. A. Luke, “Verification of RANS Turbulence Models in Loci-CHEM Using the Method of Manufactured Solutions,” AIAA-2007-4203, Miami, Florida, June 2007.
33. S. P. Veluri, C. J. Roy, R. Rifki, J. C. Worley, B. D. Recktenwald, and A. Ahmed, “Joint Computational/Experimental Aerodynamic study of a Simplified Tractor/Trailer Geometry,” AIAA-2007-4430, Miami, Florida, June 2007.
34. C. J. Roy and H. Ghuge, “Detached Eddy Simulations of a Simplified Tractor/Trailer Geometry,” Accepted to The Aerodynamics of Heavy Vehicles II: Trucks, Buses, and Trains, Engineering Conferences International, Lake Tahoe, California, August 26-31, 2007.
35. R. K. Duggirala, C. J. Roy, R. K. Kalluri, H. Yang, D. R. Cahela, and B. J. Tatarchuk, “Computational Fluid Dynamics Simulations of Gas Flow through Microfibrous Materials: Analysis of Dilution of Packed Beds,” Abstract submitted to the American Institute of Chemical Engineers Annual Meeting, Salt Lake City, Utah, November 4-9, 2007.
36. R. K. Duggirala, C. J. Roy, R. K. Kalluri, H. Yang, D. R. Cahela, and B. J. Tatarchuk, “Effect of Intra-Bed Flow Maldistribution on Chemical Conversion in Microfibrous Materials using Computational Fluid Dynamics,” Abstract submitted to the American Institute of Chemical Engineers Annual Meeting, Salt Lake City, Utah, November 4-9, 2007.
37. D. R. Cahela, R. Duggirala, C. J. Roy, H. Yang, R. Kalluri, and B. J. Tatarchuk, “Residence Time Distribution Analysis from CFD Simulations of Microscale Flows in Microfibrous Entrapped Adsorbents/Catalysts,” Abstract submitted to the American Institute of Chemical Engineers Annual Meeting, Salt Lake City, Utah, November 4-9, 2007.
38. R. R. Kalluri, R. Duggirala, D. Cahela, C. J. Roy, and B. J. Tatarchuk, “Modeling and Analysis of Transport and Reaction Rates in Microfibrous Entrapped Catalysts/Sorbents,” Abstract submitted to the American Institute of Chemical Engineers Annual Meeting, Salt Lake City, Utah, November 4-9, 2007.
39. R. K. Duggirala, C. J. Roy, R. K. Kalluri, D. R. Cahela, and B. J. Tatarchuk, “Simulation of Surface Chemical Reactions in Microfibrous Gas Flows using Computational Fluid Dynamics,” 7th Asian CFD Conference, Bangalore, India, November 26-30, 2007.
40. C. J. Roy and A. J. Sinclair, “On the Generation of Exact Solutions for Evaluating Numerical Schemes and Estimating Discretization Error,” Accepted to the NATO RTO Symposium on Computational Uncertainty, Athens, Greece, Dec. 3-6, 2007.
41. S. P. Veluri, C. J. Roy, S. Hebert, and E. A. Luke, “Verification of the Loci-CHEM CFD Code using the Method of Manufactured Solutions,” Abstract submitted to the 46th AIAA Aerospace Sciences Meeting, Reno, Nevada, January 7-10, 2008.
42. J. Doyle, R. Hartfield, and C. J. Roy, “Tractor Trailer Base Region Drag Optimization by a Genetic Algorithm with CFD,” Abstract submitted to the 46th AIAA Aerospace Sciences Meeting, Reno, Nevada, January 7-10, 2008.
Presentations at Professional Meetings and Conferences
1. C. J. Roy, J. R. Edwards, and D. S. McRae, “Numerical Simulation of Axisymmetric, Bluff-Body Stabilized Flames Using Eddy Viscosity-Transport Turbulence Models,” Presented at the Eastern States Combustion Meeting, Hilton Head, SC, Dec. 9-11, 1996.
2. C. J. Roy and J. R. Edwards, “Bluff-Body Stabilization Effects in Supersonic Turbulent Combustion,” Presented at the Eastern States Combustion Meeting, Hartford, CT, Oct. 27-29, 1997.
3. C. J. Roy and J. R. Edwards, “Computational Analysis of a Bluff-body Stabilized Flame with Complex Chemistry,” Presented at the Joint Meeting of the US Sections of the Combustion Institute, Washington, DC, March 15-17, 1999.
4. P. E. DesJardin, C. J. Roy, and T. M. Smith, “Numerical Simulations of a Turbulent Reacting Plume,” 8th SIAM International Conference on Numerical Combustion, Amelia Island, FL, March 5-8, 2000.
5. C. J. Roy and M. M. Hopkins, “The Method of Nearby Problems: An Approach for Assessing Error Estimators,” presented at the 7th US National Congress on Computational Mechanics, Albuquerque, NM, July 2003.
6. M. A. Barone, C. J. Roy, L. J. DeChant, and J. L. Payne, “Hybrid RANS/LES Computation of Turbulent Wakes,” Lockheed Martin Mechanical Analysis Conference, Sunnyvale, CA, March 2004.
Additional Publications
1. C. J. Roy, “Viability of the Diagonal Implicit Algorithm for Hypersonic Flowfields with Finite-Rate Chemistry,” Masters Thesis, Texas A&M University, December 1994.
2. C. J. Roy, “A Computational Study of Turbulent Reacting Flowfields for Scramjet Applications,” Doctoral Thesis, North Carolina State University, December 1998.
3. C. J. Roy, “A Review of Possible Solver Enhancements for the SACCARA Code,” Sandia National Laboratories Internal Memorandum, June, 1999.
4. C. J. Roy, “Analysis of a Low-Speed Turbulent Flat Plate with the SACCARA Code,” Sandia National Laboratories Internal Memorandum, June, 1999.
5. C. J. Roy, “New Insight into the Order of Accuracy for Mixed-Order Schemes,” Sandia National Laboratories Internal Memorandum, May, 2000.
6. C. J. Roy and F. G. Blottner “Compressible Flow Turbulence Modeling Requirements for SIERRA/Premo,” Sandia National Laboratories Internal Memorandum, October, 2001.
7. R. McCallen, K. Salari, J. Ortega, D. Yen-Nakafuji, T. Dunn, F. Browand, M. Hammache, A. Leonard, M. Rubel, W. Rutledge, C. Roy, M. McWherter-Payne, J. Ross, D. Satran, B. Storms, S. Walker and J. T. Heineck, “Aerodynamic Design of Heavy Vehicles Reporting Period September 2001 through January 15, 2002,” UCRL-ID-147155, February, 2002.
8. C. J. Roy, V. Romero, and J. F. Dempsey, “Extrapolation and Spatial Discretization Error Estimation Applied to Component Temperature Response Failure Characterization,” Sandia National Laboratories Internal Memorandum, May, 2002.
9. R. McCallen, K. Salari, J. Ortega, T. Dunn, F. Browand, D. Arcas, M. Hammache, A. Leonard, P. Chatelain, M. Rubel, M. McWherter-Payne, C. Roy, W. Rutledge, J. Ross, D. Satran, J. T. Heineck, B. Storms, D. Pointer, T. Sofu, D. Weber, E. Chu, P. Hancock, B. Bundy, and B. Englar, “April 2002 Working Group Meeting on Heavy Vehicle Aerodynamic Drag: Presentations and Summary of Comments and Conclusions,” UCRL-ID-149855, August, 2002.
10. R. McCallen, K. Salari, J. Ortega, T. Dunn, C. Roy, M. McWherter-Payne, D. Kuntz, J. Payne, B. Hassan, A. Leonard, D. Kivotides, P. Chatelain, M. Rubel, D. Popinter, T. Sofu, D. Weber, D. Satran, J. T. Heineck, J. Ross, R. Mehta, F. Browand, M. Hammache, T. Y. Hsu, D. Arcas, R. Blackwelder, P. Lissaman, and R. Englar, “September 2002 Working Group Meeting on Heavy Vehicle Aerodynamic Drag: Presentations and Summary of Comments and Conclusions,” UCRL-ID-151073, November, 2002.
11. R. McCallen, K. Salari, J. Ortega, T. Dunn, F. Browand, M. Hammache, T. Hsu, D. Arcas, A. Leonard, M. Rubel, P. Chatelain, W. Rutledge, C. Roy, B. Hassan, J. Ross, D. Satran, S. Walker, J. T. Heineck, D. Pointer, and T. Sofu, “Aerodynamic Design of Heavy Vehicles Reporting Period October 15, 2002 through January 15, 2003,” UCRL-ID-151812, February, 2003.
12. R. McCallen, K. Salari, J. Ortega, F. Browand, M. Hammache, T. Hsu, D. Arcas, A. Leonard, P. Chatelain, M. Rubel, C. Roy, L. DeChant, B. Hassan, J. Ross, D. Satran, S. Walker, J. T. Heineck, R. Englar, D. Pointer, and T. Sofu, “May 2003 Working Group Meeting on Heavy Vehicle Aerodynamic Drag: Presentations and Summary of Comments and Conclusions,” UCRL-ID-154886, September, 2003.
13. R. McCallen, K. Salari, J. Ortega, P. Castellucci, C. Eastwood, L. DeChant, B. Hassan, F. Browand, D. Arcas, J. Ross, J. T. Heineck, B. Storms, S. Walker, A. Leonard, C. Roy, D. Whitfield, D. Pointer, T. Sofu, R. Englar, and R. Funk, “July 2004 Working Group Meeting on Heavy Vehicle Aerodynamic Drag: Presentations, Summary of Comments and Conclusions,” UCRL-TR-206106, August 2004 (88 pages).
14. D. L. Potter, F. G. Blottner, A. R. Lopez, C. J. Roy, and B. L. Bainbridge, “Visualization of Instrumental Verification Information Details (VIVID): Code Development, Description, and Usage,” Sandia National Laboratories Report SAND2005-1485, March 2005.
15. R. C. McCallen, K. Salari, J. Ortega, P. Castellucci, C. Eastwood, J. Paschkewitz, W. D. Pointer, L. J. DeChant, B. Hassan, F. Browand, C. Radovich, T. Merzel, D. Plocher, J. Ross, B. Storms, J. T. Heineck, S. Walker, C. J. Roy, “DOE Project on Heavy Vehicle Aerodynamic Drag FY 2005 Annual Report,” UCRL-TR-217193, November 2005.
General Interest Publications
1. A. T. Conlisk, C. J. Roy, A. Seifert, and S. Gogineni, “2004 Year in Review: Fluid Dynamics,” Aerospace America, December 2004, pp. 14-15 ().
Research Contracts and Grants
Funded Research
Academic Year 2004 (TOTAL = $197,873)
1. Simulation of Tractor/Trailer Aerodynamics, US Department of Energy via Sandia National Laboratories, $73,044, Year 1 of 2, PI: C. J. Roy
2. Error Estimation for Partial Differential Equations, Sandia National Laboratories, $44,295, Year 1 of 2, PI: C. J. Roy
3. Unsteady Turbulence Modeling Using Hybrid RANS/LES, Sandia National Laboratories, $30,534, Year 1, PI: C. J. Roy
4. Linux Cluster Development at Auburn University, equipment proposal funded by Auburn University (50% COE, 50% OVPR), $50,000, PI: C. J. Roy
Academic Year 2005 (TOTAL = $404,280)
1. Error Estimation for Partial Differential Equations, Sandia National Laboratories, $66,280, Year 2 of 2, PI: C. J. Roy
2. Simulation of Tractor/Trailer Aerodynamics, US Department of Energy via Sandia National Laboratories, $40,000, Year 2 of 2, PI: C. J. Roy
3. Computational Aerodynamic Analysis Error Estimation, Missile and Space Intelligence Center, $50,000, 1 Year, PI: C. J. Roy
4. Computational and Experimental Investigation of Truck Aerodynamics, US Department of Transportation, $248,000, Year 1 of 2, ($112,500 sub-contracted to Digital Fusion, Huntsville, AL), PI: C. J. Roy, Co-PIs: Anwar Ahmed and Roy Hartfield
Academic Year 2006 (TOTAL = $257,000)
1. CFD Simulation of Microfibrous Flows, sub-task submitted to B. Tatarchuk (Auburn Chemical Engineering Dept.) under US Army Tank-automotive and Armaments Commend (TACOM), $62,000, Year 1 of 2, sub-task PI: C. J. Roy
2. Code Verification for the LOCI-CHEM CFD Code, NASA Constellation University Institutes Project via University of Alabama at Huntsville, $45,000, Year 1 of 1, PI: C. J. Roy
3. Numerical Error Estimation for Computational Aerodynamics, Missile and Space Intelligence Center, $50,000, 1 Year, PI: C. J. Roy
4. Strategies for Automatic Mesh Refinement in CFD, US Army AMRDEC, Redstone Arsenal, AL, $100,000, 1 Year, PI: C. J. Roy
Academic Year 2007 (TOTAL = $465,000)
1. Presidential Early Career Award for Scientists and Engineers: On the Role of Numerical Error in Turbulence Simulations, $250,000, 5 Years, PI: C. J. Roy
2. Code Verification for the LOCI-CHEM CFD Code, NASA Constellation University Institutes Project via University of Alabama at Huntsville, $110,000, Year 1 of 1, PI: C. J. Roy, Co-PI: W. Foster
3. Code Verification for the LOCI-CHEM CFD Code (UF), NASA Constellation University Institutes Project via University of Florida, $50,000, Year 1 of 1, PI: C. J. Roy
4. Code Verification for the LOCI-STREAM CFD Code, NASA Small Business Technology Transfer (STTR) Phase I Program with Streamline Numerics, Inc., $30,000, Year 1 of 1, PI: C. J. Roy
5. Numerical Error Estimation for Computational Aerodynamics, Missile and Space Intelligence Center, $25,000, 1 Year, PI: C. J. Roy
Student Activities
General Student Activities
Faculty Co-Advisor, AIAA Student Chapter, Auburn University, November 2005-August 2006
Chair, 2nd Bi-annual AIAA CFD Student Paper Competition, Miami, Florida, June 2007
Co-chair, 1st Bi-annual AIAA CFD Student Paper Competition, Toronto, Canada, June 2005
Graduate Students Funded (graduation date)
1. Anil Raju, Masters Student, Error Estimation for Partial Differential Equations (August 2005)
2. Srivamsi Patchipulusu, Masters Student, Numerical Error Estimation (August 2005)
3. Harshavardhan Ghuge, Masters Student, Tractor Trailer Aerodynamics (August 2006)
4. Ravi Duggirala, Doctoral Student, CFD Simulation of Microfibrous Flows (December 2007)
5. S. Pavan Veluri, Doctoral Student, Tractor Trailer Aerodynamics (May 2009)
6. Eric Tendean, Masters Student, Verification of Turbulence Models in LOCI-CHEM (December 2007)
7. Carmen Heintzelman, Masters Student, Numerical Error Estimation for Computational Aerodynamics (May 2008)
8. Alex Bruder, Masters Student, Automatic Mesh Refinement for CFD (August 2007)
9. Saurabh Bhatnagar, Masters Student, High-Order Continuity Spline Fitting in Two Dimensions (May 2008)
Undergraduate Students Funded
1. J. Chad Brown, Fall 2003-Summer 2004
2. Michael Norman, Fall 2003-Fall 2004
3. Josh Doyle, Fall 2004-Spring 2005
4. Samantha Roberts, Spring 2005-Spring 2006
5. Brooke Hill, Spring 2006
6. Bryan Gunter, Fall 2006
7. Reva Ladd, Fall 2006-Spring 2007
8. Jason Gilbert, Fall 2006-Spring 2007
9. Zachary Sorensen, Fall 2006-Spring 2007
10. Seth Curl, Fall 2006-Spring 2007
11. Justin Morgan, Fall 2006-Spring 2007
12. Adam McGinnis, Fall 2006-Spring 2007
13. Derek Nichols, Summer 2007
Graduate Committees
1. Phillip Mylnarski, Masters in Aerospace Engineering, December 2004 (Committee Member)
2. Heather McNamara, Masters in Aerospace Engineering, March 2005 (Committee Member)
3. Mukund Karanjikar, Doctor of Philosophy, Chemical Engineering, April 2005 (Graduate Reader)
4. Ran Dai, Masters in Aerospace Engineering, July 2005 (Committee Member)
5. S. Mahdi Saeidi, Doctor of Philosophy, Mechanical Engineering, July 2005 (Graduate Reader)
6. Anil Raju, Master of Science, Aerospace Engineering, August 2005 (Chair)
7. Srivamsi Patchipulusu, Masters in Aerospace Engineering, August 2005 (Chair)
8. Srivamsi Patchipulusu, Masters in Mathematics, August 2005 (Committee Member)
9. Brett Wilkes, Master of Science, Aerospace Engineering, October 2005 (Committee Member)
10. Damian Rositch, Master of Science, Aerospace Engineering, expected May 2007 (Committee Member)
11. Harshal Ghuge, Master of Science, Aerospace Engineering, May 2007 (Chair)
12. Doug Bailey, Doctor of Philosophy, Aerospace Engineering, May 2007 (Committee Member)
13. Ranjeeth Kalluri, Doctor of Philosophy, Chemical Engineering, expected July 2007 (Committee Member)
14. Ravi Duggirala, Doctor of Philosophy, Aerospace Engineering, expected August 2007 (Chair)
15. Pavan Veluri, Doctor of Philosophy, Aerospace Engineering, expected August 2008 (Chair)
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