V. Gregory Weirs

Computational Science

(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

Brian Freno, Brian Carnes, V. Weirs, (2021). Code-verification techniques for hypersonic reacting flows in thermochemical nonequilibrium Journal of Computational Physics https://doi.org/10.1016/j.jcp.2020.109752 Publication ID: 74280

Brian Freno, Brian Carnes, V. Weirs, (2020). Code-Verification Techniques for Hypersonic Reacting Flows in Thermochemical Nonequilibrium https://doi.org/10.2172/1831600 Publication ID: 71587

Brian Freno, Brian Carnes, V. Weirs, (2019). Code-Verification Techniques for Hypersonic Reacting Flows in Thermochemical Nonequilibrium https://doi.org/10.2514/6.2019-3705 Publication ID: 69000

Jaideep Ray, Sarah Kieweg, Derek Dinzl, Brian Carnes, V. Weirs, Brian Freno, Micah Howard, Thomas Smith, (2019). Estimation of inflow uncertainties in laminar hypersonic double-cone experiments AIAA Scitech Forum https://doi.org/10.2514/6.2019-2279 Publication ID: 73466

Brian Freno, Brian Carnes, V. Weirs, (2019). Code-verification techniques for hypersonic reacting flows in thermochemical nonequilibrium AIAA Aviation 2019 Forum https://doi.org/10.2514/6.2019-3705 Publication ID: 68589

Sarah Kieweg, Jaideep Ray, V. Weirs, Brian Carnes, Derek Dinzl, Brian Freno, Micah Howard, Eric Phipps, William Rider, Thomas Smith, Ioannis Nompelis, Graham Candler, (2018). Validation Assessment of Hypersonic Double-Cone Flow Simulations using Uncertainty Quantification Sensitivity Analysis and Validation Metrics https://doi.org/10.2514/6.2019-2278 Publication ID: 60450

Jaideep Ray, Sarah Kieweg, Derek Dinzl, Brian Carnes, V. Weirs, Brian Freno, Micah Howard, Thomas Smith, I. Nompelis, G.V. Candler, (2018). Estimation of inflow uncertainties in laminar hypersonic double-cone experiments https://doi.org/10.2514/6.2019-2279 Publication ID: 60655

Brian Carnes, Derek Dinzl, Thomas Smith, V. Weirs, (2018). Code verification and numerical error estimation for use in model validation of laminar hypersonic double-cone flows https://doi.org/10.2514/6.2019-2175 Publication ID: 60663

Jaideep Ray, Sarah Kieweg, Derek Dinzl, Brian Carnes, V. Weirs, Brian Freno, Micah Howard, Thomas Smith, Ioannis Nompelis, G.V Candler, (2018). Estimation of inflow uncertainties in laminar hypersonic double-cone experiments https://doi.org/10.2514/6.2019-2279 Publication ID: 60318

Brian Carnes, V. Weirs, Thomas Smith, (2018). Code verification and numerical error estimation for use in model validation of laminar hypersonic double-cone flows https://doi.org/10.2514/6.2019-2175 Publication ID: 62535

Brian Carnes, Marco Arienti, Erin Mussoni, Brian Freno, V. Weirs, Thomas Smith, William Rider, (2018). Verification for Hypersonic Reacting Turbulent Flow https://www.osti.gov/servlets/purl/1513346 Publication ID: 62029

V. Weirs, Brian Carnes, Derek Dinzl, Micah Howard, Sarah Kieweg, Jaideep Ray, William Rider, Thomas Smith, (2018). A Validation Study for a Hypersonic Flow Model https://www.osti.gov/servlets/purl/1515624 Publication ID: 62144

Brian Carnes, Marco Arienti, Brian Freno, Erin Mussoni, V. Weirs, Thomas Smith, (2018). Verification for Hypersonic Reacting Turbulent Flow https://www.osti.gov/servlets/purl/1513654 Publication ID: 58774

Vicente Romero, V. Weirs, (2017). A Class of Simple and Effective UQ Methods for Sparse Replicate Data applied to the Cantilever Beam End-to-End UQ Problem https://doi.org/10.2514/6.2018-1665 Publication ID: 54797

Vicente Romero, Matthew Bonney, Benjamin Schroeder, V. Weirs, (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

V. Weirs, Justin Winokur, (2017). A Summary of Modeling and Simulation Assessment Techniques https://www.osti.gov/servlets/purl/1460263 Publication ID: 57198

V. Weirs, (2017). Solution Verification Using the Robust Multi-Regression Approach https://www.osti.gov/servlets/purl/1457898 Publication ID: 56194

V. Weirs, (2016). A Summary Of Modeling and Simulation Assessments Techniques 2016 https://www.osti.gov/servlets/purl/1371814 Publication ID: 51014

Brian Carnes, Steven Bova, Travis Fisher, V. Weirs, Timothy Wildey, (2016). Discretization error transport for unstructured CFD https://www.osti.gov/servlets/purl/1422082 Publication ID: 50012

V. Weirs, (2016). Solution Verification for Field Variables https://www.osti.gov/servlets/purl/1364695 Publication ID: 50096

V. Weirs, James Kamm, (2015). A Summary Of Modeling and Simulation Assessments Techniques 2015 https://www.osti.gov/servlets/purl/1262622 Publication ID: 44305

Travis Fisher, Steven Bova, V. Weirs, Timothy Wildey, (2015). Propagating Discretization Error Estimates in Compressible Turbulent Flow Simulations https://www.osti.gov/servlets/purl/1246879 Publication ID: 42861

William Rider, R. James, V. Weirs, (2015). Verification Validation and Uncertainty Quantification for CGS Sandia journal manuscript; Not yet accepted for publication https://www.osti.gov/servlets/purl/1427241 Publication ID: 42631

V. Weirs, (2014). Dakota uncertainty quantification methods applied to the NEK-5000 SAHEX model https://doi.org/10.2172/1155019 Publication ID: 38882

Allen Robinson, Sharon Petney, Richard Drake, V. Weirs, Brian Adams, Dena Vigil, John Carpenter, Christopher Garasi, Michael Wong, Joshua Robbins, Christopher Siefert, Otto Strack, Ann Wills, Timothy Trucano, Pavel Bochev, Randall Summers, James Stewart, Curtis Ober, William Rider, Thomas Haill, Raymond Lemke, Kyle Cochrane, Michael Desjarlais, Edward Love, Thomas Voth, Stewart Mosso, John Niederhaus, (2013). ALEGRA Update: Modernization and Resilience Progress https://www.osti.gov/servlets/purl/1115141 Publication ID: 35790

V. Weirs, George Orient, Laura Swiler, Vicente Romero, Brian Carnes, (2013). Proposal for the 2014 Verification and Validation Challenge Workshop https://www.osti.gov/servlets/purl/1106789 Publication ID: 34693

V. Weirs, William Rider, James Kamm, (2013). Comparison of Solution Verification Techniques https://www.osti.gov/servlets/purl/1115251 Publication ID: 34769

V. Weirs, Brian Carnes, Kenneth Hu, George Orient, Vicente Romero, Laura Swiler, (2013). Proposal for FY14 V&V Challenge Workshop https://www.osti.gov/servlets/purl/1079791 Publication ID: 33646

V. Weirs, (2013). Classification Systems for V&V Benchmark Data https://www.osti.gov/servlets/purl/1145400 Publication ID: 33695

George Orient, Brian Carnes, Vicente Romero, Laura Swiler, V. Weirs, (2013). Proposal for FY14 V&V Challenge Workshop https://www.osti.gov/servlets/purl/1115651 Publication ID: 33324

V. Weirs, (2012). An initial review of NE-KAMS validation data quality standards https://doi.org/10.2172/1055869 Publication ID: 30670

V. Weirs, (2012). Crossapplication of uncertainty quantification and code verification techniques https://www.osti.gov/servlets/purl/1293988 Publication ID: 27415

V. Weirs, (2012). Prism users guide https://doi.org/10.2172/1038200 Publication ID: 26983

William Rider, V. Weirs, Edward Love, (2011). Dynamic Compressible Flow Verification Problems: Oldies but Goodies https://www.osti.gov/servlets/purl/1118504 Publication ID: 24906

Jean-Paul Davis, James Lane, Aidan Thompson, Richard Drake, V. Weirs, Dawn Flicker, Joshua Robbins, Raymond Lemke, Matthew Martin, C. Scott Alexander, Thomas Haill, Tommy Ao, D. Dolan, (2011). 4th Workshop on Ramp Compression https://www.osti.gov/servlets/purl/1671679 Publication ID: 24331

V. Weirs, (2011). Slides for Brannon talk at DTRA https://www.osti.gov/servlets/purl/1663316 Publication ID: 24385

V. Weirs, (2011). Challenges for Assessment of Modeling and Simulation in the Large https://www.osti.gov/servlets/purl/1120200 Publication ID: 23859

William Rider, James Kamm, V. Weirs, (2011). The Role of Theory in Calculation Verification https://www.osti.gov/servlets/purl/1120909 Publication ID: 21621

V. Weirs, (2011). Visualizing Material Model Data Using PRISM https://www.osti.gov/servlets/purl/1110583 Publication ID: 21261

V. Weirs, James Kamm, Laura Swiler, Brian Adams, William Rider, Michael Eldred, (2010). Sensitivity analysis techniques applied to a model shock problem https://www.osti.gov/biblio/1035999 Publication ID: 21030

V. Weirs, Laura Swiler, Brian Adams, William Rider, Michael Eldred, (2010). Sensitivity analysis techniques applied to a model shock problem https://www.osti.gov/biblio/1035611 Publication ID: 20964

James Kamm, V. Weirs, Laura Swiler, Brian Adams, William Rider, Michael Eldred, (2010). A Sensitivity Analysis of the Gas Dynamics Equations https://www.osti.gov/servlets/purl/1121790 Publication ID: 20131

V. Weirs, Laura Swiler, Brian Adams, James Kamm, William Rider, Michael Eldred, (2010). Sensitivity analysis techniques applied to a system of hyperbolic conservation laws. Part I https://www.osti.gov/biblio/1021144 Publication ID: 19070

V. Weirs, (2010). Verification practices for code development teams https://www.osti.gov/biblio/1016324 Publication ID: 18401

V. Weirs, (2010). Verification Practices for Code Development Teams https://www.osti.gov/servlets/purl/1124211 Publication ID: 18020

V. Weirs, Raymond Lemke, Allen Robinson, Curtis Ober, J. Banks, Edward Love, Guglielmo Scovazzi, John Shadid, Heath Hanshaw, (2007). Algorithm developments in alegra guided by testing https://www.osti.gov/servlets/purl/1266291 Publication ID: 11076

Kenneth Moreland, Elmer Chavez, V. Weirs, Thomas Brunner, Timothy Trucano, David Karelitz, (2007). Post-processing V&V level II ASC milestone (2360) results https://doi.org/10.2172/933216 Publication ID: 11343

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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