2 Results
Skip to search filters

Towards Z-Next: The Integration of Theory, Experiments, and Computational Simulation in a Bayesian Data Assimilation Framework

Maupin, Kathryn A.; Tran, Anh; Lewis, William L.; Knapp, Patrick K.; Joseph, V.R.; Wu, C.F.J.; Glinsky, Michael G.; Valaitis, Sonata V.

Making reliable predictions in the presence of uncertainty is critical to high-consequence modeling and simulation activities, such as those encountered at Sandia National Laboratories. Surrogate or reduced-order models are often used to mitigate the expense of performing quality uncertainty analyses with high-fidelity, physics-based codes. However, phenomenological surrogate models do not always adhere to important physics and system properties. This project develops surrogate models that integrate physical theory with experimental data through a maximally-informative framework that accounts for the many uncertainties present in computational modeling problems. Correlations between relevant outputs are preserved through the use of multi-output or co-predictive surrogate models; known physical properties (specifically monotoncity) are also preserved; and unknown physics and phenomena are detected using a causal analysis. By endowing surrogate models with key properties of the physical system being studied, their predictive power is arguably enhanced, allowing for reliable simulations and analyses at a reduced computational cost.

More Details

Increased preheat energy to MagLIF targets with cryogenic cooling

Harvey-Thompson, Adam J.; Geissel, Matthias G.; Crabtree, Jerry A.; Weis, Matthew R.; Gomez, Matthew R.; Fein, Jeffrey R.; Ampleford, David A.; Awe, Thomas J.; Chandler, Gordon A.; Galloway, B.R.; Hansen, Stephanie B.; Hanson, Jeffrey J.; Harding, Eric H.; Jennings, Christopher A.; Kimmel, Mark W.; Knapp, Patrick K.; Lamppa, Derek C.; Lewis, William L.; Mangan, Michael M.; Maurer, A.; Perea, L.; Peterson, Kara J.; Porter, John L.; Rambo, Patrick K.; Robertson, Grafton K.; Rochau, G.A.; Ruiz, Daniel E.; Shores, Jonathon S.; Slutz, Stephen A.; Smith, Ian C.; Speas, Christopher S.; Yager-Elorriaga, David A.; York, Adam Y.; Paguio, R.R.; Smith, G.E.

Abstract not provided.

2 Results
2 Results