V. Gregory Weirs

Computational Science

Author profile picture

Computational Science

vgweirs@sandia.gov

(505) 845-2032

Sandia National Laboratories, New Mexico
 P.O. Box 5800
 Albuquerque, NM 87185-1320

Biography

I am a Senior Member of the Technical Staff in the Computational Science Department. My expertise by training is computational fluid dynamics for compressible reacting flows, and these remain at the core of my recent projects. At Sandia I have also focused on verification and validation (V&V) and uncertainty quantification (UQ) for numerical simulations, and data analysis and visualization.

Education

I earned degrees from North Carolina State University (BS, MS) and the University of Minnesota (PhD), all in Aerospace Engineering. My research backround includes compressible fluid dynamics, shock physics, reactive flows, and turbulent flows, and on the numerical methods for simulating them. After a research associate position at the University of Chicago ASC Center on Astrophysical Thermonuclear Flashes, I came to Sandia in 2005.

Publications

  • Freno, B., Carnes, B., Weirs, V.G., & Weirs, V.G. (2021). Code-verification techniques for hypersonic reacting flows in thermochemical nonequilibrium. Journal of Computational Physics, 425. https://doi.org/10.1016/j.jcp.2020.109752 Publication ID: 74280
  • Freno, B., Carnes, B., Weirs, V.G., & Weirs, V.G. (2020). Code-Verification Techniques for Hypersonic Reacting Flows in Thermochemical Nonequilibrium [Conference Presenation]. https://doi.org/10.2172/1831600 Publication ID: 71587
  • Freno, B., Carnes, B., Weirs, V.G., & Weirs, V.G. (2019). Code-Verification Techniques for Hypersonic Reacting Flows in Thermochemical Nonequilibrium [Conference Poster]. https://doi.org/10.2514/6.2019-3705 Publication ID: 69000
  • Ray, J., Kieweg, S., Dinzl, D., Carnes, B., Weirs, V.G., Freno, B., Howard, M., Smith, T., & Smith, T. (2019). Estimation of inflow uncertainties in laminar hypersonic double-cone experiments. AIAA Scitech Forum, 2019. https://doi.org/10.2514/6.2019-2279 Publication ID: 73466
  • Freno, B., Carnes, B., Weirs, V.G., & Weirs, V.G. (2019). Code-verification techniques for hypersonic reacting flows in thermochemical nonequilibrium [Conference Poster]. AIAA Aviation 2019 Forum. https://doi.org/10.2514/6.2019-3705 Publication ID: 68589
  • Kieweg, S., Ray, J., Weirs, V.G., Carnes, B., Dinzl, D., Freno, B., Howard, M., Phipps, E., Rider, W., Smith, T., Nompelis, I., Candler, G., & Candler, G. (2018). Validation Assessment of Hypersonic Double-Cone Flow Simulations using Uncertainty Quantification Sensitivity Analysis and Validation Metrics [Conference Poster]. https://doi.org/10.2514/6.2019-2278 Publication ID: 60450
  • Ray, J., Kieweg, S., Dinzl, D., Carnes, B., Weirs, V.G., Freno, B., Howard, M., Smith, T., Nompelis, I., Candler, G., & Candler, G. (2018). Estimation of inflow uncertainties in laminar hypersonic double-cone experiments [Conference Poster]. https://doi.org/10.2514/6.2019-2279 Publication ID: 60655
  • Carnes, B., Dinzl, D., Smith, T., Weirs, V.G., & Weirs, V.G. (2018). Code verification and numerical error estimation for use in model validation of laminar hypersonic double-cone flows [Conference Poster]. https://doi.org/10.2514/6.2019-2175 Publication ID: 60663
  • Ray, J., Kieweg, S., Dinzl, D., Carnes, B., Weirs, V.G., Freno, B., Howard, M., Smith, T., Nompelis, I., Candler, G., & Candler, G. (2018). Estimation of inflow uncertainties in laminar hypersonic double-cone experiments [Conference Poster]. https://doi.org/10.2514/6.2019-2279 Publication ID: 60318
  • Carnes, B., Weirs, V.G., Smith, T., & Smith, T. (2018). Code verification and numerical error estimation for use in model validation of laminar hypersonic double-cone flows [Conference Poster]. https://doi.org/10.2514/6.2019-2175 Publication ID: 62535
  • Carnes, B., Arienti, M., Mussoni, E., Freno, B., Weirs, V.G., Smith, T., Rider, W., & Rider, W. (2018). Verification for Hypersonic Reacting Turbulent Flow [Conference Poster]. https://www.osti.gov/biblio/1513346 Publication ID: 62029
  • Weirs, V.G., Carnes, B., Dinzl, D., Howard, M., Kieweg, S., Ray, J., Rider, W., Smith, T., & Smith, T. (2018). A Validation Study for a Hypersonic Flow Model [Conference Poster]. https://www.osti.gov/biblio/1515624 Publication ID: 62144
  • Carnes, B., Arienti, M., Freno, B., Mussoni, E., Weirs, V.G., Smith, T., & Smith, T. (2018). Verification for Hypersonic Reacting Turbulent Flow [Conference Poster]. https://www.osti.gov/biblio/1513654 Publication ID: 58774
  • Romero, V., Weirs, V.G., & Weirs, V.G. (2017). A Class of Simple and Effective UQ Methods for Sparse Replicate Data applied to the Cantilever Beam End-to-End UQ Problem [Conference Poster]. https://doi.org/10.2514/6.2018-1665 Publication ID: 54797
  • Romero, V., Weirs, V.G., & Weirs, V.G. (2017). A Class of Simple and Effective UQ Methods for Sparse Replicate Data applied to the Cantilever Beam End-to-End UQ Problem [Conference Poster]. https://doi.org/10.2514/6.2018-1665 Publication ID: 54174
  • Romero, V., Bonney, M., Schroeder, B., Weirs, V.G., & Weirs, V.G. (2017). Evaluation of a Class of Simple and Effective Uncertainty Methods for Sparse Samples of Random Variables and Functions. https://doi.org/10.2172/1409725 Publication ID: 54166
  • Weirs, V.G., Winokur, J., & Winokur, J. (2017). A Summary of Modeling and Simulation Assessment Techniques [Presentation]. https://www.osti.gov/biblio/1460263 Publication ID: 57198
  • Weirs, V.G. (2017). Solution Verification Using the Robust Multi-Regression Approach [Conference Poster]. https://www.osti.gov/biblio/1457898 Publication ID: 56194
  • Weirs, V.G. (2016). A Summary Of Modeling and Simulation Assessments Techniques 2016 [Presentation]. https://www.osti.gov/biblio/1371814 Publication ID: 51014
  • Weirs, V.G. (2016). Solution Verification for Field Variables [Conference Poster]. https://www.osti.gov/biblio/1364695 Publication ID: 50096
  • Carnes, B., Bova, S., Fisher, T., Weirs, V.G., Wildey, T., & Wildey, T. (2016). Discretization error transport for unstructured CFD [Conference Poster]. https://www.osti.gov/biblio/1422082 Publication ID: 50012
  • Weirs, V.G., Kamm, J., & Kamm, J. (2015). A Summary Of Modeling and Simulation Assessments Techniques 2015 [Presentation]. https://www.osti.gov/biblio/1262622 Publication ID: 44305
  • Fisher, T., Bova, S., Weirs, V.G., Wildey, T., & Wildey, T. (2015). Propagating Discretization Error Estimates in Compressible Turbulent Flow Simulations [Presentation]. https://www.osti.gov/biblio/1246879 Publication ID: 42861
  • Rider, W., James, R., Weirs, V.G., & Weirs, V.G. (2015). Verification Validation and Uncertainty Quantification for CGS. Sandia journal manuscript; Not yet accepted for publication. https://www.osti.gov/biblio/1427241 Publication ID: 42631
  • Weirs, V.G. (2014). Dakota uncertainty quantification methods applied to the NEK-5000 SAHEX model. https://doi.org/10.2172/1155019 Publication ID: 38882
  • Robinson, A., Petney, S., Drake, R., Weirs, V.G., Adams, B., Vigil, D., Carpenter, J., Garasi, C., Wong, M., Robbins, J., Siefert, C., Strack, O., Wills, A., Trucano, T., Bochev, P., Summers, R., Stewart, J., Ober, C., Rider, W., … Niederhaus, J. (2013). ALEGRA Update: Modernization and Resilience Progress [Conference]. https://www.osti.gov/biblio/1115141 Publication ID: 35790
  • Weirs, V.G., Rider, W., Kamm, J., & Kamm, J. (2013). Comparison of Solution Verification Techniques [Conference]. https://www.osti.gov/biblio/1115251 Publication ID: 34769
  • Weirs, V.G., Orient, G.E., Swiler, L., Romero, V., Carnes, B., & Carnes, B. (2013). Proposal for the 2014 Verification and Validation Challenge Workshop [Conference]. https://www.osti.gov/biblio/1106789 Publication ID: 34693
  • Weirs, V.G. (2013). Classification Systems for V&V Benchmark Data [Conference]. https://www.osti.gov/biblio/1145400 Publication ID: 33695
  • Weirs, V.G., Carnes, B., Hu, K., Orient, G.E., Romero, V., Swiler, L., & Swiler, L. (2013). Proposal for FY14 V&V Challenge Workshop [Conference]. https://www.osti.gov/biblio/1079791 Publication ID: 33646
  • Orient, G.E., Carnes, B., Romero, V., Swiler, L., Weirs, V.G., & Weirs, V.G. (2013). Proposal for FY14 V&V Challenge Workshop [Conference]. https://www.osti.gov/biblio/1115651 Publication ID: 33324
  • Weirs, V.G. (2012). An initial review of NE-KAMS validation data quality standards. https://doi.org/10.2172/1055869 Publication ID: 30670
  • Weirs, V.G. (2012). Crossapplication of uncertainty quantification and code verification techniques [Conference]. https://www.osti.gov/biblio/1293988 Publication ID: 27415
  • Weirs, V.G. (2012). Prism users guide. https://doi.org/10.2172/1038200 Publication ID: 26983
  • Rider, W., Weirs, V.G., Love, E., & Love, E. (2011). Dynamic Compressible Flow Verification Problems: Oldies but Goodies [Conference]. https://www.osti.gov/biblio/1118504 Publication ID: 24906
  • Davis, J., Lane, J., Thompson, A., Drake, R., Weirs, V.G., Flicker, D., Robbins, J., Lemke, R., Martin, M., Scott Alexander, C., Haill, T., Ao, T., Dolan, D.H., & Dolan, D.H. (2011). 4th Workshop on Ramp Compression [Presentation]. https://www.osti.gov/biblio/1671679 Publication ID: 24331
  • Weirs, V.G. (2011). Slides for Brannon talk at DTRA [Presentation]. https://www.osti.gov/biblio/1663316 Publication ID: 24385
  • Weirs, V.G. (2011). Challenges for Assessment of Modeling and Simulation in the Large [Conference]. https://www.osti.gov/biblio/1120200 Publication ID: 23859
  • Rider, W., Kamm, J., Weirs, V.G., & Weirs, V.G. (2011). The Role of Theory in Calculation Verification [Conference]. https://www.osti.gov/biblio/1120909 Publication ID: 21621
  • Weirs, V.G. (2011). Visualizing Material Model Data Using PRISM [Conference]. https://www.osti.gov/biblio/1110583 Publication ID: 21261
  • Weirs, V.G., Kamm, J., Swiler, L., Adams, B., Rider, W., Eldred, M., & Eldred, M. (2010). Sensitivity analysis techniques applied to a model shock problem [Conference]. https://www.osti.gov/biblio/1035999 Publication ID: 21030
  • Weirs, V.G., Swiler, L., Adams, B., Rider, W., Eldred, M., & Eldred, M. (2010). Sensitivity analysis techniques applied to a model shock problem [Conference]. https://www.osti.gov/biblio/1035611 Publication ID: 20964
  • Kamm, J., Weirs, V.G., Swiler, L., Adams, B., Rider, W., Eldred, M., & Eldred, M. (2010). A Sensitivity Analysis of the Gas Dynamics Equations [Conference]. https://www.osti.gov/biblio/1121790 Publication ID: 20131
  • Weirs, V.G., Kamm, J., Swiler, L., Adams, B., Rider, W., Eldred, M., & Eldred, M. (2010). Sensitivity analysis techniques applied to a model shock problem [Conference]. https://www.osti.gov/biblio/1027079 Publication ID: 20037
  • Weirs, V.G., Swiler, L., Adams, B., Kamm, J., Rider, W., Eldred, M., & Eldred, M. (2010). Sensitivity analysis techniques applied to a system of hyperbolic conservation laws. Part I [Conference]. https://www.osti.gov/biblio/1021144 Publication ID: 19070
  • Weirs, V.G. (2010). Verification practices for code development teams [Conference]. https://www.osti.gov/biblio/1016324 Publication ID: 18401
  • Weirs, V.G. (2010). Verification Practices for Code Development Teams [Conference]. https://www.osti.gov/biblio/1124211 Publication ID: 18020
  • Weirs, V.G., Lemke, R., Robinson, A., Ober, C., Banks, J.W., Love, E., Scovazzi, G., Shadid, J.N., Hanshaw, H., & Hanshaw, H. (2007). Algorithm developments in alegra guided by testing [Conference]. https://www.osti.gov/biblio/1266291 Publication ID: 11076
  • Moreland, K., Chavez, E., Weirs, V.G., Brunner, T.A., Trucano, T., Karelitz, D., & Karelitz, D. (2007). Post-processing V&V level II ASC milestone (2360) results. https://doi.org/10.2172/933216 Publication ID: 11343
Showing 10 of 49 publications.

Awards & Recognition

2013

Brian M. Adams, Lara E Bauman, William J Bohnhoff, Ethan Chan, Keith R Dalbey, Mohamed S Ebeida, Michael S Eldred, Patricia D Hough, Kenneth Hu, John D Jakeman, George E Orient, Laura P Swiler, V. Gregory Weirs, Team Employee Recognition Award, Sandia National Laboratories, For demonstrated success in transforming Dakota to a production computational tool in support of Sandia's core NW mission and a growing external customer base, April 22, 2013

2012

V. Gregory Weirs, SPOT Award, Sandia National Laboratories, "For outstanding work in leading the development of Prism and providing training in its use.", April 24, 2012