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

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4934645· OSTI ID:1240613

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.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396; AC52-06NA2-5396
OSTI ID:
1240613
Alternate ID(s):
OSTI ID: 1225556
Report Number(s):
LA-UR-15-24743; JAPIAU
Journal Information:
Journal of Applied Physics, Vol. 118, Issue 18; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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Cited By (8)

Peculiarities in breakup and transport process of shock-induced ejecta with surrounding gas journal May 2019
Picosecond x-ray radiography of microjets expanding from laser shock-loaded grooves journal August 2018
Ejecta velocities in twice-shocked liquid metals under extreme conditions: A hydrodynamic approach journal July 2019
Numerical and theoretical investigation of jet formation in elastic-plastic solids journal November 2018
Influence of edge conditions on material ejection from periodic grooves in laser shock-loaded tin journal May 2016
Molecular dynamics simulations of ejecta production from sinusoidal tin surfaces under supported and unsupported shocks journal April 2018
Molecular-dynamics simulation of Richtmyer-Meshkov instability on a Li-H 2 interface at extreme compressing conditions journal June 2018
A numerical study of bubble and spike velocities in shock-driven liquid metals journal January 2018

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