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Stephen A. Andrews
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Journal Articles

Posterior Covariance Matrix Approximations

Abigail C. Schmid, Stephen A. Andrews
Journal: Journal of Verification, Validation and Uncertainty Quantification
Publisher: ASME
Article Type: Research-Article
J. Verif. Valid. Uncert. March 2024, 9(1): 011003.
Paper No: VVUQ-23-1048
https://doi.org/10.1115/1.4065378
Published Online: May 13, 2024
View Article titled, Posterior Covariance Matrix Approximations
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Topics: Approximation, Calibration, Chain, Equations of state, Inverse problems, Specific heat, Thermal expansion, Uncertainty, Variational techniques, Temperature
Proceedings Papers

Variational Bayesian Calibration of a PTW Material Strength Model for OFHC Copper

Stephen A. Andrews, Brandon M. Wilson
Proc. ASME. VVUQ2023, ASME 2023 Verification, Validation, and Uncertainty Quantification Symposium, V001T08A002, May 17–19, 2023
Publisher: American Society of Mechanical Engineers
Paper No: VVUQ2023-108829
https://doi.org/10.1115/VVUQ2023-108829
View Paper titled, Variational Bayesian Calibration of a PTW Material Strength Model for OFHC Copper
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Topics: Calibration, Copper, Strength (Materials), Uncertainty, Temperature, Simulation, Deformation, Electrical conductivity, Melting, Model development
Journal Articles

Verification of a Specialized Hydrodynamic Simulation Code for Modeling Deflagration and Detonation of High Explosives

Stephen A. Andrews, Tariq D. Aslam
Journal: Journal of Verification, Validation and Uncertainty Quantification
Publisher: ASME
Article Type: Research-Article
J. Verif. Valid. Uncert. March 2022, 7(1): 011006.
Paper No: VVUQ-20-1055
https://doi.org/10.1115/1.4053340
Published Online: February 9, 2022
View Article titled, Verification of a Specialized Hydrodynamic Simulation Code for Modeling Deflagration and Detonation of High Explosives
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Topics: Boundary-value problems, Equations of state, Equilibrium (Physics), Errors, Explosions, Explosives, Heat conduction, Physics, Pressure, Simulation
Proceedings Papers

Exploring the Uncertainty in the Equation of State for a High Explosive Fit to Heterogeneous Data

Stephen A. Andrews, Andrew M. Fraser, Scott I. Jackson, Eric K. Anderson
Proc. ASME. VVS2019, ASME 2019 Verification and Validation Symposium, V001T06A001, May 15–17, 2019
Publisher: American Society of Mechanical Engineers
Paper No: VVS2019-5124
https://doi.org/10.1115/VVS2019-5124
View Paper titled, Exploring the Uncertainty in the Equation of State for a High Explosive Fit to Heterogeneous Data
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Topics: Equations of state, Explosives, Uncertainty, Calibration, Temperature, Density, Explosions, Metals, Optimization, Physics
Journal Articles

Estimating Physics Models and Quantifying Their Uncertainty Using Optimization With a Bayesian Objective Function

Stephen A. Andrews, Andrew M. Fraser
Journal: Journal of Verification, Validation and Uncertainty Quantification
Publisher: ASME
Article Type: Research-Article
J. Verif. Valid. Uncert. March 2019, 4(1): 011002.
Paper No: VVUQ-18-1024
https://doi.org/10.1115/1.4043807
Published Online: June 18, 2019
View Article titled, Estimating Physics Models and Quantifying Their Uncertainty Using Optimization With a Bayesian Objective Function
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Topics: Eigenfunctions, Optimization, Physics, Probability, Simulation, Uncertainty, Cylinders, Explosions, Splines, Approximation
Proceedings Papers

Design of Streamwise Stagger Within a Pin Fin Array to Minimize Pressure Loss

Stephen A. Andrews, William D. E. Allan
Proc. ASME. IMECE2008, Volume 10: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B, and C, 1497-1505, October 31–November 6, 2008
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2008-66683
https://doi.org/10.1115/IMECE2008-66683
View Paper titled, Design of Streamwise Stagger Within a Pin Fin Array to Minimize Pressure Loss
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Topics: Design, Pressure, Friction, Computer cooling, Cooling, Heat, Heat transfer, Heating, Pressure drop, Stress