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DOE OSTI · 3018732

Modeling Material Interfaces with the Six-Equation Model in FLEXO

Cearley, Griffin Scott [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)]·Stagg, Alan K. [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000201557025)·Woolstrum, Jeffrey Michael [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000261180995)·Crockatt, Michael Meyers [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000243931556)·Granzow, Brian Neal [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000284523129)
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Abstract

FLEXO is a multiphysics code developed at Sandia National Laboratories for predictive simulation of pulsed power target physics with extended magnetohydrodynamics modeling. Given this application space, FLEXO must be able to perform high-fidelity simulations of pulsed-power systems that include multiple materials. This work presents the augmentation of FLEXO with a six-equation model for multimaterial flow. We design and analyze discretizations of the six-equation model, emphasizing desirable properties for robust multimaterial simulation. We also present solution limiting, bounds preservation, and pressure equilibration/relaxation techniques that enhance the robustness of the overall multimaterial scheme. We present a suite of test problems to document these new capabilities of the FLEXO code.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS97 MATHEMATICS AND COMPUTING

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Cearley, Griffin Scott [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)], Stagg, Alan K. [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000201557025), Woolstrum, Jeffrey Michael [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000261180995), Crockatt, Michael Meyers [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000243931556), Granzow, Brian Neal [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000284523129). 2026-01-01. Modeling Material Interfaces with the Six-Equation Model in FLEXO. https://doi.org/10.2172/3018732

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