Constrained optimization framework for interface-aware sub-scale dynamics models for voids closure in Lagrangian hydrodynamics

Barlow, Andrew; Klima, Matej; Shashkov, Mikhail

doi:10.1016/j.jcp.2018.03.034

Constrained optimization framework for interface-aware sub-scale dynamics models for voids closure in Lagrangian hydrodynamics

Journal Article · Mon Apr 02 00:00:00 EDT 2018 · Journal of Computational Physics

DOI:https://doi.org/10.1016/j.jcp.2018.03.034· OSTI ID:1432627

Barlow, Andrew ^[1]; Klima, Matej ^[2]; Shashkov, Mikhail ^[3]

AWE Aldermaston, Reading, Berkshire (United States). Computational Physics Group
Czech Technical Univ. in Prague, Prague (Czech Republic). Faculty of Nuclear Sciences and Physical Engineering; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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. Finally, we also present a sneak peek of a realistic shaped charge calculation in the presence of voids and solids.

Research Organization:: Los Alamos National Laboratory (LANL)

Sponsoring Organization:: Czech Technical University; USDOE National Nuclear Security Administration (NNSA); USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1432627

Alternate ID(s):: OSTI ID: 1532776

Report Number(s):: LA-UR-18-22479

Journal Information:: Journal of Computational Physics, Journal Name: Journal of Computational Physics Vol. 371; ISSN 0021-9991

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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A non-local void dynamics modeling and simulation using the Proper Generalized Decomposition Ghnatios, Chady; Simacek, Pavel; Chinesta, Francisco International Journal of Material Forming, Vol. 13, Issue 4 https://doi.org/10.1007/s12289-019-01490-7	journal	May 2019

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
97 MATHEMATICS AND COMPUTING
Interface-aware sub-scale closure models
Lagrangian hydrodynamics
Multimaterial cells
Void closure

Constrained optimization framework for interface-aware sub-scale dynamics models for voids closure in Lagrangian hydrodynamics

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References (12)

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