An interface-aware sub-scale dynamics multi-material cell model for solids with void closure and opening at all speeds

Klima, Matej; Barlow, Andrew; Kucharik, Milan; Shashkov, Mikhail Jurievich

doi:10.1016/j.compfluid.2020.104578

An interface-aware sub-scale dynamics multi-material cell model for solids with void closure and opening at all speeds

Journal Article · Sat May 16 00:00:00 EDT 2020 · Computers and Fluids

DOI:https://doi.org/10.1016/j.compfluid.2020.104578· OSTI ID:1630886

Klima, Matej ^[1]; Barlow, Andrew ^[2]; Kucharik, Milan ^[1]; ^[3]

Czech Technical Univ., Prague (Czech Republic)
Atomic Weapons Establishment (AWE) Aldermaston, Berkshire (United Kingdom)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Here, we present a multi-material cell model (closure model) for demanding arbitrary Lagrangian-Eulerian (ALE) simulations of fluids and solids. It is based on the interface-aware sub-scale dynamics (IASSD) approach which utilizes the exact material interface geometry within the computational cell to calculate internal material interactions. Our formulation of the closure model also aims to improve the accuracy in low-speed impact events. Voids are used to represent ambient vacuum and internal free boundaries of the distinct materials. Void regions can close and open at contact surfaces, allowing a transition from contact physics to free motion in vacuum. The coupling of void closure and opening with a new formulation of the IASSD model for solids is tested on several one- and two-dimensional numerical examples, ranging from gas expansion in vacuum to planar and round object impacts at various speeds.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

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

Grant/Contract Number:: 89233218CNA000001; AC52-06NA25396

OSTI ID:: 1630886

Alternate ID(s):: OSTI ID: 1682506

Report Number(s):: LA-UR--20-20195

Journal Information:: Computers and Fluids, Journal Name: Computers and Fluids Journal Issue: C Vol. 208; ISSN 0045-7930

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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42 ENGINEERING
Lagrangian hydrodynamics
interface-aware sub-scale dynamics closure model
multi-material flows
solid mechanics
void closure
void opening

An interface-aware sub-scale dynamics multi-material cell model for solids with void closure and opening at all speeds

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