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Title: Ionic transport in high-energy-density matter

Abstract

Ionic transport coefficients for dense plasmas have been numerically computed using an effective Boltzmann approach. Here, we developed a simplified effective potential approach that yields accurate fits for all of the relevant cross sections and collision integrals. These results have been validated with molecular-dynamics simulations for self-diffusion, interdiffusion, viscosity, and thermal conductivity. Molecular dynamics has also been used to examine the underlying assumptions of the Boltzmann approach through a categorization of behaviors of the velocity autocorrelation function in the Yukawa phase diagram. By using a velocity-dependent screening model, we examine the role of dynamical screening in transport. Implications of these results for Coulomb logarithm approaches are discussed.

Authors:
 [1];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Center for Applied Scientific Computing
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Computational Physics and Methods Group
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1414086
Alternate Identifier(s):
OSTI ID: 1246522
Report Number(s):
LA-UR-16-20725; LLNL-JNL-681618
Journal ID: ISSN 2470-0045; PLEEE8; TRN: US1800621
Grant/Contract Number:  
AC52-06NA25396; AC52-07NA27344; LLNL-JRNL-681618; LA-UR-16-20725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 93; Journal Issue: 4; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma physics, transport

Citation Formats

Stanton, Liam G., and Murillo, Michael S. Ionic transport in high-energy-density matter. United States: N. p., 2016. Web. doi:10.1103/PhysRevE.93.043203.
Stanton, Liam G., & Murillo, Michael S. Ionic transport in high-energy-density matter. United States. doi:10.1103/PhysRevE.93.043203.
Stanton, Liam G., and Murillo, Michael S. Fri . "Ionic transport in high-energy-density matter". United States. doi:10.1103/PhysRevE.93.043203. https://www.osti.gov/servlets/purl/1414086.
@article{osti_1414086,
title = {Ionic transport in high-energy-density matter},
author = {Stanton, Liam G. and Murillo, Michael S.},
abstractNote = {Ionic transport coefficients for dense plasmas have been numerically computed using an effective Boltzmann approach. Here, we developed a simplified effective potential approach that yields accurate fits for all of the relevant cross sections and collision integrals. These results have been validated with molecular-dynamics simulations for self-diffusion, interdiffusion, viscosity, and thermal conductivity. Molecular dynamics has also been used to examine the underlying assumptions of the Boltzmann approach through a categorization of behaviors of the velocity autocorrelation function in the Yukawa phase diagram. By using a velocity-dependent screening model, we examine the role of dynamical screening in transport. Implications of these results for Coulomb logarithm approaches are discussed.},
doi = {10.1103/PhysRevE.93.043203},
journal = {Physical Review E},
number = 4,
volume = 93,
place = {United States},
year = {2016},
month = {4}
}

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Cited by: 13 works
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