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Title: The effects of plasma diffusion and viscosity on turbulent instability growth

Abstract

We perform two-dimensional simulations of strongly–driven compressible Rayleigh–Taylor and Kelvin–Helmholtz instabilities with and without plasma transport phenomena, modeling plasma species diffusion, and plasma viscosity in order to determine their effects on the growth of the hydrodynamic instabilities. Simulations are performed in hydrodynamically similar boxes of varying sizes, ranging from 1 μm to 1 cm in order to determine the scale at which plasma effects become important. Our results suggest that these plasma effects become noticeable when the box size is approximately 100 μm, they become significant in the 10 μm box, and dominate when the box size is 1 μm. Results suggest that plasma transport may be important at scales and conditions relevant to inertial confinement fusion, and that a plasma fluid model is capable of representing some of the kinetic transport effects.

Authors:
; ; ; ;  [1]
  1. Los Alamos National Laboratory, MS T087, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
22303630
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 21; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; APPROXIMATIONS; HELMHOLTZ INSTABILITY; INERTIAL CONFINEMENT; PLASMA; SIMULATION; TWO-DIMENSIONAL CALCULATIONS; VISCOSITY

Citation Formats

Haines, Brian M., E-mail: bmhaines@lanl.gov, Vold, Erik L., Molvig, Kim, Aldrich, Charles, and Rauenzahn, Rick. The effects of plasma diffusion and viscosity on turbulent instability growth. United States: N. p., 2014. Web. doi:10.1063/1.4895502.
Haines, Brian M., E-mail: bmhaines@lanl.gov, Vold, Erik L., Molvig, Kim, Aldrich, Charles, & Rauenzahn, Rick. The effects of plasma diffusion and viscosity on turbulent instability growth. United States. doi:10.1063/1.4895502.
Haines, Brian M., E-mail: bmhaines@lanl.gov, Vold, Erik L., Molvig, Kim, Aldrich, Charles, and Rauenzahn, Rick. Mon . "The effects of plasma diffusion and viscosity on turbulent instability growth". United States. doi:10.1063/1.4895502.
@article{osti_22303630,
title = {The effects of plasma diffusion and viscosity on turbulent instability growth},
author = {Haines, Brian M., E-mail: bmhaines@lanl.gov and Vold, Erik L. and Molvig, Kim and Aldrich, Charles and Rauenzahn, Rick},
abstractNote = {We perform two-dimensional simulations of strongly–driven compressible Rayleigh–Taylor and Kelvin–Helmholtz instabilities with and without plasma transport phenomena, modeling plasma species diffusion, and plasma viscosity in order to determine their effects on the growth of the hydrodynamic instabilities. Simulations are performed in hydrodynamically similar boxes of varying sizes, ranging from 1 μm to 1 cm in order to determine the scale at which plasma effects become important. Our results suggest that these plasma effects become noticeable when the box size is approximately 100 μm, they become significant in the 10 μm box, and dominate when the box size is 1 μm. Results suggest that plasma transport may be important at scales and conditions relevant to inertial confinement fusion, and that a plasma fluid model is capable of representing some of the kinetic transport effects.},
doi = {10.1063/1.4895502},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 9,
volume = 21,
place = {United States},
year = {2014},
month = {9}
}