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Title: CTH Calculations of Richtmyer-Meshov Instability Growth

Abstract

We have used the hydrodynamics code CTH to simulate Richtmyer-Meshkov (R-M) flow from the surfaces of shock-released samples of copper and tin with parallel sinusoidal grooves across a diameter. For copper, using strength and damage parameters from previous spall recompression experiments, we find good agreement with proton radiographs and velocimetry that show spike and bubble growth, but the ultimate lengths of the spikes are too large. Agreement with experiments can be improved by adding strength to the flow stress model in CTH. For tin, which melted upon shock release in the R-M studies, the strength model does not matter much, and good agreement was obtained there also.

Authors:
 [1];  [1]
  1. National Security Technologies, LLC. (NSTec), Mercury, NV (United States)
Publication Date:
Research Org.:
Nevada Test Site/National Security Technologies, LLC (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
OSTI Identifier:
1240347
Report Number(s):
DOE/NV/25946-2503
DOE Contract Number:  
DE-AC52-06NA25946
Resource Type:
Program Document
Country of Publication:
United States
Language:
English
Subject:
Richtmyer-Meshov flow, spall, ejecta, flow stress model

Citation Formats

Stevens, Gerald D., and Vesser, Lynn R. CTH Calculations of Richtmyer-Meshov Instability Growth. United States: N. p., 2015. Web.
Stevens, Gerald D., & Vesser, Lynn R. CTH Calculations of Richtmyer-Meshov Instability Growth. United States.
Stevens, Gerald D., and Vesser, Lynn R. Mon . "CTH Calculations of Richtmyer-Meshov Instability Growth". United States. https://www.osti.gov/servlets/purl/1240347.
@article{osti_1240347,
title = {CTH Calculations of Richtmyer-Meshov Instability Growth},
author = {Stevens, Gerald D. and Vesser, Lynn R.},
abstractNote = {We have used the hydrodynamics code CTH to simulate Richtmyer-Meshkov (R-M) flow from the surfaces of shock-released samples of copper and tin with parallel sinusoidal grooves across a diameter. For copper, using strength and damage parameters from previous spall recompression experiments, we find good agreement with proton radiographs and velocimetry that show spike and bubble growth, but the ultimate lengths of the spikes are too large. Agreement with experiments can be improved by adding strength to the flow stress model in CTH. For tin, which melted upon shock release in the R-M studies, the strength model does not matter much, and good agreement was obtained there also.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {6}
}

Program Document:
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