Marian Nemec, Ph.D.
- Aerospace Engineer, NASA Ames Research Center (ARC)
- Branch Chief (Acting)
- Computational Physics Branch (TNP)
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In a nutshell, Marian Nemec is the acting Branch Chief of the Computational Physics branch in the Advanced Supercomputing division at NASA Ames. He is the primary developer of Cart3D’s adjoint-based mesh refinement module and shape optimization framework. He obtained his PhD from the University of Toronto Institute for Aerospace Studies in 2003 and came to NASA Ames as a Post Doctoral Research Associate the same year.
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Research/Technical Interests
- Adjoint methods for discretization error analysis and shape optimization
- Embedded-boundary Cartesian mesh methods
- Adaptive mesh refinement
- Aircraft design
- Uncertainty quantification
Publications
- Nemec, M., Bedonian, G., Aftosmis, M.J.," Acoustic Signature Uncertainty Quantification for Quiet Supersonic Aircraft", AIAA 2024-4671
- Nemec, M., Aftosmis, M.J., Rallabhandi, S.R., Rodriguez, D.L., "Goal-Oriented Discretization Error Control in Coupled Nearfield-Farfield Low-Boom Simulations", AIAA 2022-4085
- Nemec, M., Aftosmis, M.J., Smith, L., "Uncertainty Estimates for Sonic-Boom Pressure Signatures and Loudness Carpets", AIAA 2021-2753
- Nemec, M., Rodriguez, D.L., and Aftosmis, M.J., "Adjoint-Based Mesh Adaptation and Shape Optimization for Simulations with Propulsion", AIAA 2019-3488
- Nemec, M., Aftosmis, M.J., and Brown, P.G., "Numerical Prediction of Meteoric Infrasound Signatures", Planetary and Space Science, 2017.
- Nemec, M., and Aftosmis, M. J., "Toward Automatic Verification of Goal-Oriented Flow Simulations", NASA/TM-2014-218386, August, 2014.
- Nemec, M., and Aftosmis, M. J., "Output Error Estimates and Mesh Refinement in Aerodynamic Shape Optimization", AIAA Paper 2013-0865, 51st AIAA Aerospace Sciences Meeting, Grapevine, TX, Jan 2013
- Nemec, M., and Aftosmis, M. J., "Parallel Adjoint Framework for Aerodynamic Shape Optimization of Component-Based Geometry," AIAA Paper 2011-1249, 49th AIAA Aerospace Sciences Meeting, Orlando, FL, Jan 2011.
- Nemec, M., and Aftosmis, M. J., “Adjoint Sensitivity Computations for an Embedded-Boundary Cartesian Mesh Method”, Journal of Computational Physics, Vol. 224, Issue 4, pp. 2724-2742, 2008, doi:10.1016/j.jcp.2007.11.018
- Nemec, M., Aftosmis, M. J., and Wintzer, M., "Adjoint-Based Adaptive Mesh Refinement for Complex Geometries", AIAA Paper 2008-0725, 46th AIAA Aerospace Sciences Meeting, Reno, NV, Jan 2008.
- Nemec, M., and Aftosmis, M. J., "Adjoint Error Estimation and Adaptive Refinement for Embedded-Boundary Cartesian Meshes", AIAA Paper 2007-4187, 18th AIAA CFD Conference, Miami, FL, June 2007.
- Nemec, M., and Aftosmis, M. J., "Aerodynamic Shape Optimization Using a Cartesian Adjoint Method and CAD Geometry", AIAA Paper 2006-3456, 24th AIAA Applied Aerodynamics Conference, San Francisco, CA, June 2006.
- Nemec, M., and Aftosmis, M. J., "Adjoint Algorithm for CAD-Based Shape Optimization Using a Cartesian Method", AIAA Paper 2005-4987, 17th AIAA CFD Conference, Toronto, ON, June 2005.
- Nemec, M., Aftosmis, M.J., Murman, S.M., and Pulliam, T.H., "Adjoint Formulation for an Embedded-Boundary Cartesian Method", AIAA Paper 2005-0877, 43rd AIAA Aerospace Sciences Meeting, Reno, NV, Jan. 2005.
- Nemec, M., Aftosmis, M.J., and Pulliam, T.H., "CAD-Based Aerodynamic Design of Complex Configurations Using a Cartesian Method", AIAA Paper 2004-0113, 42nd AIAA Aerospace Sciences Meeting, Reno, NV, Jan. 2004.
- Nemec, M., Zingg, D.W., and Pulliam, T.H., "Multi-point and Multi-Objective Aerodynamic Shape Optimization", AIAA Journal, Vol. 42, No. 6, June 2004.
- Nemec, M., and Zingg, D.W., "Optimization of High-Lift Configurations Using a Newton-Krylov Algorithm", AIAA Paper 2003-3957, 16th AIAA CFD Conference, Orlando, FL, June 2003.
- M. Nemec, “Optimal Shape Design of Aerodynamic Configurations: A Newton-Krylov Approach, PhD Thesis, University of Toronto Institute for Aerospace Studies, 2003.
- Nemec, M., and Zingg, D.W., "From Analysis to Design of High-Lift Configurations Using a Newton-Krylov Algorithm", ICAS 2002 Congress, Paper 173, Toronto, Sept. 2002.
- Nemec, M., and Zingg, D.W., "Newton-Krylov Algorithm for Aerodynamic Design Using the Navier-Stokes Equations", AIAA Journal, Vol. 40, No. 6, pp. 1146-1154, June 2002.
- Nemec, M., and Zingg, D.W., "Aerodynamic Computations Using the Convective Upstream Split Pressure Scheme with Local Preconditioning", AIAA Paper 98-2444, June 1998. (See also AIAA Journal, Vol. 38, No. 3, March 2000).
- M. Nemec, “Aerodynamic Computations Using The Convective Upstream Split Pressure Scheme With Local Preconditioning”, MASc Thesis, University of Toronto Institute for Aerospace Studies, 1998.
Presentations
- Output Error Estimates and Mesh Refinement in Aerodynamic Shape Optimization, 51st Aerospace Sciences Meeting; 7-10 Jan. 2013; Grapevine, TX.
- Computations of Aerodynamic Performance Databases Using Output-Based Refinement, 47th AIAA Aerospace Sciences Meeting, Invited Presentation, FL, Jan. 2009.
Awards
- Aeronautics Research Mission Directorate Associate Administrator Individual Award, Technology and Innovation
- NASA Exceptional Public Achievement Medal
