Journal
JOURNAL OF COMPUTATIONAL PHYSICS
Volume 371, Issue -, Pages 914-944Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2018.03.034
Keywords
Lagrangian hydrodynamics; Multimaterial cells; Interface-aware sub-scale closure models; Void closure
Funding
- National Nuclear Security Administration of the US Department of Energy at Los Alamos National Laboratory [DE-AC52-06NA25396]
- US Department of Energy Office of Science Advanced Scientific Computing Research (ASCR) Program in Applied Mathematics Research
- US Department of Energy National Nuclear Security Administration Advanced Simulation and Computing (ASC) Program
- Czech Technical University [SGS16/247/OHK4/3T/14]
- Czech Science Foundation project [18-20962S]
- Czech Ministry of Education project [RVO68407700]
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In hydrocodes, voids are used to represent vacuum and model free boundaries between vacuum and real materials. We give a systematic description of a new treatment of void closure in the framework of the multimaterial arbitrary Lagrangian-Eulerian (ALE) methods. This includes a new formulation of the interface-aware sub-scale-dynamics (IA-SSD) closure model for multimaterial cells with voids, which is used in the Lagrangian stage of our indirect ALE scheme. The results of the comprehensive testing of the new model are presented for one- and two-dimensional multimaterial calculations in the presence of voids. We also present a sneak peek of a realistic shaped charge calculation in the presence of voids and solids. (C) 2018 Elsevier Inc. All rights reserved.
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