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

Abstract

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.

Authors:
 [1];  [2];  [1]; ORCiD logo [3]
+ Show Author Affiliations
  1. Czech Technical Univ., Prague (Czech Republic)
  2. Atomic Weapons Establishment (AWE) Aldermaston, Berkshire (United Kingdom)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); Czech Technical University
OSTI Identifier:
1630886
Alternate Identifier(s):
OSTI ID: 1682506
Report Number(s):
LA-UR-20-20195
Journal ID: ISSN 0045-7930
Grant/Contract Number:  
89233218CNA000001; AC52-06NA25396; SGS19/191/OHK4/3T/14
Resource Type:
Accepted Manuscript
Journal Name:
Computers and Fluids
Additional Journal Information:
Journal Volume: 208; Journal Issue: C; Journal ID: ISSN 0045-7930
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Lagrangian hydrodynamics; solid mechanics; multi-material flows; interface-aware sub-scale dynamics closure model; void closure; void opening

Citation Formats

Klima, Matej, Barlow, Andrew, Kucharik, Milan, and Shashkov, Mikhail Jurievich. An interface-aware sub-scale dynamics multi-material cell model for solids with void closure and opening at all speeds. United States: N. p., 2020. Web. doi:10.1016/j.compfluid.2020.104578.
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Klima, Matej, Barlow, Andrew, Kucharik, Milan, & Shashkov, Mikhail Jurievich. An interface-aware sub-scale dynamics multi-material cell model for solids with void closure and opening at all speeds. United States. https://doi.org/10.1016/j.compfluid.2020.104578
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Klima, Matej, Barlow, Andrew, Kucharik, Milan, and Shashkov, Mikhail Jurievich. Sat . "An interface-aware sub-scale dynamics multi-material cell model for solids with void closure and opening at all speeds". United States. https://doi.org/10.1016/j.compfluid.2020.104578. https://www.osti.gov/servlets/purl/1630886.
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@article{osti_1630886,
title = {An interface-aware sub-scale dynamics multi-material cell model for solids with void closure and opening at all speeds},
author = {Klima, Matej and Barlow, Andrew and Kucharik, Milan and Shashkov, Mikhail Jurievich},
abstractNote = {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.},
doi = {10.1016/j.compfluid.2020.104578},
journal = {Computers and Fluids},
number = C,
volume = 208,
place = {United States},
year = {Sat May 16 00:00:00 EDT 2020},
month = {Sat May 16 00:00:00 EDT 2020}
}
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https://doi.org/10.1016/j.compfluid.2020.104578
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