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Title: On shock driven jetting of liquid from non-sinusoidal surfaces into a vacuum

Abstract

Other work employed Richtmyer-Meshkov theory to describe the development of spikes and bubblesfrom shocked sinusoidal surfaces. Here, we discuss the effects of machining different two-dimensional shaped grooves in copper and examine the resulting flow of the material after being shocked into liquid on release. For these simulations, a high performance molecular dynamics code, SPaSM, was used with machined grooves of kh 0 = 1 and kh 0 = 1/8, where 2h 0 is the peak-to-valley height of the perturbation with wavelength λ, and k = 2π/λ. The surface morphologies studied include a Chevron, a Fly-Cut, a Square-Wave, and a Gaussian. Furthermore, we describe extensions to an existing ejecta source model that better captures the mass ejected from these surfaces. We also investigate the same profiles at length scales of order 1 cm for an idealized fluid equation of state using the FLASH continuum hydrodynamics code. Our findings indicate that the resulting mass can be scaled by the missing area of a sinusoidal curve with an effective wavelength, λeff , that has the same missing area. Finally, our extended ejecta mass formula works well for all the shapes considered and captures the corresponding time evolution and total mass.

Authors:
 [1];  [1];  [1]; ORCiD logo [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of North Carolina, Charlotte, NC (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1240613
Alternate Identifier(s):
OSTI ID: 1225556
Report Number(s):
LA-UR-15-24743
Journal ID: ISSN 0021-8979; JAPIAU
Grant/Contract Number:  
AC52-06NA25396; AC52-06NA2-5396
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 118; Journal Issue: 18; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Cherne, F. J., Hammerberg, J. E., Andrews, M. J., Karkhanis, V., and Ramaprabhu, P. On shock driven jetting of liquid from non-sinusoidal surfaces into a vacuum. United States: N. p., 2015. Web. doi:10.1063/1.4934645.
Cherne, F. J., Hammerberg, J. E., Andrews, M. J., Karkhanis, V., & Ramaprabhu, P. On shock driven jetting of liquid from non-sinusoidal surfaces into a vacuum. United States. doi:10.1063/1.4934645.
Cherne, F. J., Hammerberg, J. E., Andrews, M. J., Karkhanis, V., and Ramaprabhu, P. Mon . "On shock driven jetting of liquid from non-sinusoidal surfaces into a vacuum". United States. doi:10.1063/1.4934645. https://www.osti.gov/servlets/purl/1240613.
@article{osti_1240613,
title = {On shock driven jetting of liquid from non-sinusoidal surfaces into a vacuum},
author = {Cherne, F. J. and Hammerberg, J. E. and Andrews, M. J. and Karkhanis, V. and Ramaprabhu, P.},
abstractNote = {Other work employed Richtmyer-Meshkov theory to describe the development of spikes and bubblesfrom shocked sinusoidal surfaces. Here, we discuss the effects of machining different two-dimensional shaped grooves in copper and examine the resulting flow of the material after being shocked into liquid on release. For these simulations, a high performance molecular dynamics code, SPaSM, was used with machined grooves of kh 0 = 1 and kh 0 = 1/8, where 2h 0 is the peak-to-valley height of the perturbation with wavelength λ, and k = 2π/λ. The surface morphologies studied include a Chevron, a Fly-Cut, a Square-Wave, and a Gaussian. Furthermore, we describe extensions to an existing ejecta source model that better captures the mass ejected from these surfaces. We also investigate the same profiles at length scales of order 1 cm for an idealized fluid equation of state using the FLASH continuum hydrodynamics code. Our findings indicate that the resulting mass can be scaled by the missing area of a sinusoidal curve with an effective wavelength, λeff , that has the same missing area. Finally, our extended ejecta mass formula works well for all the shapes considered and captures the corresponding time evolution and total mass.},
doi = {10.1063/1.4934645},
journal = {Journal of Applied Physics},
number = 18,
volume = 118,
place = {United States},
year = {2015},
month = {11}
}

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Cited by: 10 works
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