Jeffrey P. Thomas | Scholars@Duke

Jeffrey P. Thomas
Assistant Research Professor in the Mechanical Engineering and Materials Science

Dr. Thomas' field of research is computational aeroelasticity. This is the study of fluid and structural interaction. Dr. Thomas develops numerical methods to simulate complex physical phenomena.

Current Appointments & Affiliations

Assistant Research Professor in the Mechanical Engineering and Materials Science, Mechanical Engineering and Materials Science, Pratt School of Engineering 1996

Contact Information

237 Hudson Eng Ctr, Durham, NC 27708
Box 90300, Durham, NC 27708-0300
jthomas@duke.edu (919) 660-5173
http://www.duke.edu/~jthomas

Background
Education, Training, & Certifications
- Ph.D., University of Michigan at Ann Arbor 1996
- M.S., University of Kansas 1991
- B.S., University of Kansas 1989
Expertise
Subject Headings
- Aeroelasticity
- Computational fluid dynamics
Research
Selected Grants
- Data-driven physics-constrained model reduction of the Navier-Stokes equations awarded by University of Illinois at Urbana--Champaign 2017 - 2019
- Reduce Order Airwake Modeling for Aircraft/Ship Integration Modeling and Simulation awarded by Corvid Technologies 2017 - 2018
- Theoretical Prediction of Limit Cycle Oscillations in Support of Flight Flutter Testing awarded by Air Force Office of Scientific Research 2004 - 2007
Publications & Artistic Works
Selected Publications
- Conference Papers
  - Thomas, JP, Dowell, EH, Anderson, M, and McGowan, GZ. "Progress toward efficient compression algorithms for application in flight simulation environments." January 1, 2018. Full Text
  - Thomas, JP, and Dowell, EH. "A fixed point iteration approach for harmonic balance based aeroelastic computations." January 1, 2018. Full Text
  - Howison, J, Thomas, JP, and Ekici, K. "Progress on a wind turbine aeroelastic solution methodology using harmonic balance." January 1, 2015.
  - Thomas, JP, and Dowell, EH. "Discrete adjoint design optimization approach for increasing transonic buffet onset angle-of-attack." January 1, 2015.
  - Besem, FM, Kamrass, JD, Thomas, JP, Tang, D, and Kielb, RE. "Vortex-induced vibration and frequency lock-in of an airfoil at high angles of attack." January 1, 2014. Full Text
  - Clark, ST, Besem, FM, Kielb, RE, and Thomas, JP. "Developing a reduced-order model of non-synchronous vibration in turbomachinery using proper-orthogonal decomposition methods." January 1, 2014. Full Text
  - Thomas, JP, and Dowell, EH. "Discrete adjoint approach for aeroelastic design optimization." January 1, 2014.
  - Ekici, K, Hall, KC, Huang, H, and Thomas, JP. "Stabilization of Explicit Flow Solvers Using a Proper-Orthogonal-Decomposition Technique." May 2013. Full Text
  - Ekici, K, Hall, KC, Huang, H, and Thomas, JP. "Stabilization of Explicit Flow Solvers Using a Proper-Orthogonal-Decomposition Technique." May 2013. Full Text Link to Item
  - Thomas, JP, Dowell, EH, and Hall, KC. "Discrete adjoint method for nonlinear aeroelastic sensitivities for compressible and viscous flows." 2013.
  - Thomas, JP, Dowell, EH, and Hall, KC. "Discrete adjoint method for nonlinear aeroelastic sensitivities for compressible and viscous flows." 2013. Full Text
  - Thomas, JP, Dowell, EH, and Hall, KC. "An automatic differentiation based nonlinear reduced order modeling technique for unsteady separated flows." 2012. Full Text
  - Thomas, JP, and Léonard, O. "Towards a high order throughflow. Part I: Investigating the effectiveness of a harmonic reconstruction for 3D flows." December 1, 2010. Full Text
  - Thomas, JP, and Léonard, O. "Towards a high order throughflow. Part II: Investigation of the nonlinear harmonic method coupled with an immersed boundary method for the modeling of the circumferential stresses." December 1, 2010. Full Text
  - Thomas, JP, Custer, CH, Dowell, EH, and Hall, KC. "F-16 fighter aeroelastic computations using a harmonic balance implementation of the OVERFLOW 2 flow solver." 2010.
  - Spiker, MA, Kielb, RE, Thomas, JP, and Hall, KC. "Application of enforced motion to study 2-D cascade lock-in effect." December 1, 2009.
  - Thomas, JP, Custer, CH, Dowell, EH, and Hall, KC. "Unsteady flow computation using a harmonic balance approach implemented about the OVERFLOW 2 flow solver." 2009.
  - Léonard, O, Thomas, JP, and Borguet, S. "Ten years of experience with a small jet engine as a support for education." December 1, 2008. Full Text
  - Spiker, MA, Kielb, RE, Hall, KC, and Thomas, JP. "Efficient design method for non-synchronous vibrations using enforced motion." December 1, 2008. Full Text
  - Thomas, JP, and Léonard, O. "Investigating circumferential non-uniformities in throughflow calculations using an harmonic reconstruction." December 1, 2008. Full Text
  - Dowell, EH, Hall, KC, Thomas, JP, Kielb, RE, Spiker, MA, Li, A, and Jr, CMD. "Reduced order models in unsteady aerodynamic models, aeroelasticity and molecular dynamics." 2008.
  - Thomas, JP, Dowels, EH, Hall, KC, and Jr, CMD. "Virtual aeroelastic flight testing for the F-16 fighter with stores." 2007.
  - Spiker, MA, Thomas, JP, Hall, KC, Kielb, RE, and Dowell, EH. "Modeling cylinder flow vortex shedding with enforced motion using a harmonic balance approach." 2006.
  - Thomas, JP, Dowell, EH, Hall, KC, and Jr, CMD. "An investigation of the sensitivity of F-16 fighter flutter onset and limit cycle oscillations to uncertainties." 2006.
  - Thomas, JP, Dowell, EH, and Hall, KC. "Using automatic differentiation to create a nonlinear reduced order model of a computational fluid dynamic solver." 2006.
  - Carlson, HA, Feng, JQ, Thomas, JP, Kielb, RE, Hall, KC, and Dowell, EH. "Computational models for nonlinear aeroelasticity." 2005.
  - Dowell, EH, Hall, KC, Thomas, JP, Kielb, RE, Spiker, MA, and Jr, CMD. "Reduced order unsteady aerodynamic models and aeroelasticity." 2005.
  - Hall, KC, Kielb, RE, Ekici, K, Thomas, JP, and Clark, WS. "Recent advancements in turbomachinery aeroelastic design analysis." 2005.
  - Thomas, JP, Dowell, EH, Hall, KC, and Jr, CMD. "Further investigation of modeling limit cycle oscillation behavior of the F-16 fighter using a harmonic balance approach." 2005.
  - Thomas, JP, Dowell, EH, Hall, KC, and Jr, CMD. "Modeling limit cycle oscillation behavior of the F-16 fighter using a harmonic balance approach." 2004.
  - Hall, KC, Thomas, JP, Ekici, K, and Voytovych, DM. "Frequency domain techniques for complex and nonlinear flows in turbomachinery." December 1, 2003.
  - Thomas, JP, Dowell, EH, and Hall, KC. "Modeling limit cycle oscillations for an NLR 7301 airfoil aeroelastic configuration including correlation with experiment." December 1, 2003.
  - Thomas, JP, Hall, KC, and Dowell, EH. "A discrete adjoint approach for modeling unsteady aerodynamic design sensitivities." December 1, 2003.
  - Thomas, JP, Hall, KC, and Dowell, EH. "A harmonic balance approach for modeling nonlinear aeroelastic behavior of wings in transonic viscous flow." December 1, 2003.
  - Kielb, RE, Thomas, JP, Barter, JW, and Hall, KC. "Blade excitation by aerodynamic instabilities - A compressor blade study." 2003. Full Text
  - Thomas, JP, Dowell, EH, and Hall, KC. "Modeling limit cycle oscillations for an NLR 7301 airfoil aeroelastic configuration including correlation with experiment." 2003.
  - Thomas, JP, Hall, KC, and Dowell, EH. "A harmonic balance approach for modeling nonlinear aeroelastic behavior of wings in transonic viscous flow." 2003.
  - Kholodar, DB, Thomas, JP, Dowell, EH, and Hall, KC. "A parameter study of transonic airfoil flutter and limit cycle oscillation behavior." 2002.
  - Thomas, JP, Dowell, EH, and Hall, KC. "A harmonic balance approach for modeling three-dimensional nonlinear unsteady aerodynamics and aeroelasticity." 2002. Full Text
  - Thomas, JP, Dowell, EH, and Hall, KC. "A harmonic balance approach for modeling three-dimensional nonlinear unsteady aerodynamics and aeroelasticity." 2002. Full Text
  - Thomas, JP, Dowell, EH, and Hall, KC. "Modeling viscous transonic limit cycle oscillation behavior using a harmonic balance approach." 2002.
  - Dowell, EH, Thomas, JP, and Hall, KC. "Transonic limit cycle oscillation analysis using reduced order aerodynamic models." December 1, 2001.
  - Thomas, JP, Dowell, EH, and Hall, KC. "Three-Dimensional transonic Aeroelasticity using proper orthogonal decomposition based reduced order models." December 1, 2001.
  - Thomas, JP, Dowell, EH, and Hall, KC. "Nonlinear inviscid aerodynamic effects on transonic divergence, flutter and limit cycle oscillations." December 1, 2001.
  - Thomas, JP, Dowell, EH, and Hall, KC. "A static/dynamic correction approach for reduced-order modeling of unsteady aerodynamics." December 1, 2001.
  - Dowell, EH, Thomas, JP, and Hall, KC. "Transonic limit cycle oscillation analysis using reduced order aerodynamic models." 2001.
  - Thomas, JP, Dowell, EH, and Hall, KC. "Three-dimensional transonic aeroelasticity using proper orthogonal decomposition based reduced order models." 2001.
  - Thomas, JP, Dowell, EH, and Hall, KC. "Nonlinear inviscid aerodynamic effects on transonic divergence, flutter and limit cycle oscillations." 2001.
  - Dowell, EH, Hall, KC, Thomas, JP, Florea, R, Epureanu, BI, and Heeg, J. "Reduced order models in unsteady aerodynamics." 1999.
  - Hall, KC, Thomas, JP, and Dowell, EH. "Reduced-order modelling of unsteady small-disturbance flows using a frequency-domain proper orthogonal decomposition technique." January 1, 1999.
  - Hall, KC, Thomas, JP, and Dowell, EH. "Reduced-order modelling of unsteady small-disturbance flows using a frequency-domain proper orthogonal decomposition technique." January 1, 1999.
  - Kirn, C, Roe, PL, and Thomas, JP. "Accurate schemes for advection and aeroacoustics." January 1, 1997.
  - Kirn, C, Roe, PL, and Thomas, JP. "Accurate schemes for advection and aeroacoustics." January 1, 1997.
  - Thomas, JP, Kim, C, and Roe, PL. "Progress towards a new computational scheme for aeroacoustics." January 1, 1995.
  - Thomas, JP, Kim, C, and Roe, PL. "Progress towards a new computational scheme for aeroacoustics." January 1, 1995.
  - Thomas, JP, and Roe, PL. "Development of non-dissipative numerical schemes for computational aeroacoustics." January 1, 1993.
- Journal Articles
  - Howison, J, Thomas, J, and Ekici, K. "Aeroelastic analysis of a wind turbine blade using the harmonic balance method." Wind Energy 21, no. 4 (April 2018): 226-241. Full Text
  - Padmanabhan, MA, Dowell, EH, Thomas, JP, and Pasiliao, CL. "Store-Induced Limit-Cycle Oscillations Due to Nonlinear Wing-Store Attachment." Journal of Aircraft 53, no. 3 (May 2016): 778-789. Full Text
  - Besem, FM, Thomas, JP, Kielb, RE, and Dowell, EH. "An aeroelastic model for vortex-induced vibrating cylinders subject to frequency lock-in." Journal of Fluids and Structures 61 (February 2016): 42-59. Full Text
  - Besem, FM, Kamrass, JD, Thomas, JP, Tang, D, and Kielb, RE. "Vortex-Induced Vibration and Frequency Lock-In of an Airfoil at High Angles of Attack." Journal of Fluids Engineering 138, no. 1 (August 21, 2015): 011204-011204. Full Text
  - Hall, KC, Ekici, K, Thomas, JP, and Dowell, EH. "Harmonic balance methods applied to computational fluid dynamics problems." International Journal of Computational Fluid Dynamics 27, no. 2 (February 2013): 52-67. Full Text
  - Thomas, JP, Custer, CH, Dowell, EH, Hall, KC, and Corre, C. "Compact implementation strategy for a harmonic balance method within implicit flow solvers." AIAA Journal 51, no. 6 (2013): 1374-1381. Full Text
  - Thomas, JP, and Léonard, O. "Toward a High Order Throughflow––Investigation of the Nonlinear Harmonic Method Coupled With an Immersed Boundary Method for the Modeling of the Circumferential Stresses." Journal of Turbomachinery 134, no. 1 (2012): 011017-011017. Full Text
  - Thomas, JP, and Dowell, EH. "Airfoil transonic flow buffet calculations using the OVERFLOW 2 flow solver." Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference (2011). Full Text
  - Thomas, JP, Dowell, EH, and Hall, KC. "Using Automatic Differentiation to Create a Nonlinear Reduced-Order-Model Aerodynamic Solver." Aiaa Journal 48, no. 1 (January 2010): 19-24. Full Text
  - Meingast, M, Kielb, RE, and Thomas, JP. "Preliminary flutter design method for supersonic low pressure turbines." Proceedings of the ASME Turbo Expo 6, no. PART A (December 1, 2009): 507-515. Full Text
  - Dowell, EH, Thomas, JP, Hall, KC, and Denegri, CM. "Theoretical Predictions of F-16 Fighter Limit Cycle Oscillations for Flight Flutter Testing." Journal of Aircraft 46, no. 5 (September 2009): 1667-1672. Full Text
  - Ortner, K, Kohns, A, Turley, F, and Thomas, J. "Erosion Resistant Coatings for Aircraft Engines." Vakuum in Forschung Und Praxis 21, no. 3 (June 1, 2009): 18-21. Full Text
  - Léonard, O, Thomas, JP, and Borguet, S. "Ten Years of Experience With a Small Jet Engine as a Support for Education." Journal of Engineering for Gas Turbines and Power 131, no. 1 (2009): 012303-012303. Full Text
  - Schwarz, JB, Dowell, EH, Thomas, JP, Hall, KC, Rausch, RD, and Bartels, RE. "Improved flutter boundary prediction for an isolated two-degree-of-freedom airfoil." Journal of Aircraft 46, no. 6 (2009): 2069-2076. Full Text
  - Simon, J-F, Thomas, JP, and Léonard, O. "On the Role of the Deterministic and Circumferential Stresses in Throughflow Calculations." Journal of Turbomachinery 131, no. 3 (2009): 031019-031019. Full Text
  - Bakhle, MA, Thomas, JP, and Reddy, TSR. "Fan flutter computations using the harmonic balance method." 44th Aiaa/Asme/Sae/Asee Joint Propulsion Conference and Exhibit (December 1, 2008).
  - Dowell, EH, Hall, KC, Thomas, JP, Kielb, RE, Spiker, MA, and Jr, CMD. "A new solution method for unsteady flows around oscillating bluff bodies." Solid Mechanics and its Applications 8 (2008): 37-44.
  - Liu, L, Dowell, EH, and Thomas, JP. "A high dimensional harmonic balance approach for an aeroelastic airfoil with cubic restoring forces." Journal of Fluids and Structures 23, no. 3 (2007): 351-363. Full Text
  - Liu, L, Thomas, JP, Dowell, EH, Attar, P, and Hall, KC. "A comparison of classical and high dimensional harmonic balance approaches for a Duffing oscillator." Journal of Computational Physics 215, no. 1 (June 2006): 298-320. Full Text
  - Attar, PJ, Dowell, EH, White, JR, and Thomas, JP. "Reduced order nonlinear system identification methodology." AIAA Journal 44, no. 8 (2006): 1895-1904. Full Text
  - Thomas, JP, Dowell, EH, and Hall, KC. "Static/dynamic correction approach for reduced-order modeling of unsteady aerodynamics." Journal of Aircraft 43, no. 4 (2006): 865-878. Full Text
  - Liu, L, Dowell, EH, and Thomas, JP. "Higher order harmonic balance analysis for limit cycle oscillations in an airfoil with cubic restoring forces." Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 3 (2005): 1467-1476.
  - Thomas, JP, Hall, KC, and Dowell, EH. "Discrete adjoint approach for modeling unsteady aerodynamic design sensitivities." AIAA Journal 43, no. 9 (2005): 1931-1936.
  - Thomas, JP, Dowell, EH, and Hall, KC. "Modeling Viscous Transonic Limit Cycle Oscillation Behavior Using a Harmonic Balance Approach." Journal of Aircraft 41, no. 6 (November 2004): 1266-1274. Full Text
  - Dowell, EH, Thomas, JP, and Hall, KC. "Transonic limit cycle oscillation analysis using reduced order aerodynamic models." Journal of Fluids and Structures 19, no. 1 (2004): 17-27. Full Text
  - Kholodar, DB, Dowell, EH, Thomas, JP, and Hall, KC. "Limit-cycle oscillations of a typical airfoil in transonic flow." Journal of Aircraft 41, no. 5 (2004): 1067-1072.
  - Kholodar, DB, Dowell, EH, Thomas, JP, and Hall, KC. "Improved understanding of transonic flutter: A three-parameter flutter surface." Journal of Aircraft 41, no. 4 (2004): 911-917.
  - Thomas, JP, Dowell, EH, and Hall, KC. "Three-Dimensional Transonic Aeroelasticity Using Proper Orthogonal Decomposition-Based Reduced-Order Models." Journal of Aircraft 40, no. 3 (May 2003): 544-551. Full Text
  - Kholodar, DB, Thomas, JP, Dowell, EH, and Hall, KC. "Parametric study of flutter for an airfoil in inviscid transonic flow." Journal of Aircraft 40, no. 2 (2003): 303-313.
  - Hall, KC, Thomas, JP, and Clark, WS. "Computation of unsteady nonlinear flows in cascades using a harmonic balance technique." Aiaa Journal 40, no. 5 (January 1, 2002): 879-886. Full Text
  - Thomas, JP, Dowell, EH, and Hall, KC. "Nonlinear inviscid aerodynamic effects on transonic divergence, flutter, and limit-cycle oscillations." Aiaa Journal 40, no. 4 (January 1, 2002): 638-646. Full Text
  - Hall, KC, Thomas, JP, and Dowell, EH. "Proper orthogonal decomposition technique for transonic unsteady aerodynamic flows." Aiaa Journal 38, no. 10 (January 1, 2000): 1853-1862. Full Text

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Education, Training, & Certifications

Subject Headings

Selected Grants

Selected Publications

Conference Papers

Journal Articles