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Improved Solver Settings for 3D Exploding Wire Simulations in ALEGRA

Doney, Robert; Siefert, Christopher; Niederhaus, John H.J.

We are interested in simulating a variety of problems in 3 dimensions (3D) featuring large electric currents. While 2D simulations have been quite informative, cylindrical symmetry may interfere with a problem’s relevant physics. Specifically, all objects in the domain behave as if they are extruded 360°—turning particles into hoops. In dealing with electrical current, this can have serious ramifications on the current pathways. In 3D (r, φ, z) currents can adjust their pathways anywhere along those 360 degrees given the right conditions; however, in 2D (r, z) those pathways can be completely choked off because an insulating hoop, rather than a particle, is present.

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TYPE Other Report YEAR 2016
DOIOSTI

Complex Systems Models and Their Applications: Towards a New Science of Verification, Validation & Uncertainty Quantification

Tsao, Jeffrey Y.; Trucano, Timothy G.; Kleban, Stephen; Naugle, Asmeret B.; Verzi, Stephen J.; Swiler, Laura P.; Johnson, Curtis M.; Smith, Mark A.; Flanagan, Tatiana P.; Vugrin, Eric; Gabert, Kasimir G.; Lave, Matt; Chen, Wei; Delaurentis, Daniel; Hubler, Alfred; Oberkampf, Bill

This report contains the written footprint of a Sandia-hosted workshop held in Albuquerque, New Mexico, June 22-23, 2016 on “Complex Systems Models and Their Applications: Towards a New Science of Verification, Validation and Uncertainty Quantification,” as well as of pre-work that fed into the workshop. The workshop’s intent was to explore and begin articulating research opportunities at the intersection between two important Sandia communities: the complex systems (CS) modeling community, and the verification, validation and uncertainty quantification (VVUQ) community The overarching research opportunity (and challenge) that we ultimately hope to address is: how can we quantify the credibility of knowledge gained from complex systems models, knowledge that is often incomplete and interim, but will nonetheless be used, sometimes in real-time, by decision makers?

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TYPE SAND Report YEAR 2016
DOIOSTI
Results 4601–4625 of 9,998
Results 4601–4625 of 9,998