Electron parallel closures for the 3 + 1 fluid model
Abstract
Linear closures are obtained for arbitrary collisionality for the 3 + 1 fluid model which includes the evolution of density, flow velocity, and pressure both parallel and perpendicular to a preferred direction, usually a magnetic field. A large set of 6400 moment equations is solved to provide closures that are accurate in the collisional regime and well into the collisionless regime. The closures in the collisionless limit are determined by solving the kinetic equation with a model collision operator. Simple fits for the kernel functions that define the closures are obtained for arbitrary collisionality in wave number space. The results are linearly accurate to within 3% across the entire range of collisionality.
 Authors:

 Utah State Univ., Logan, UT (United States). Dept. of Physics
 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Publication Date:
 Research Org.:
 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Sponsoring Org.:
 USDOE National Nuclear Security Administration (NNSA); Univ. of Washington, Seattle, WA (United States). Plasma Science and Innovation Center (PSICenter)
 OSTI Identifier:
 1458633
 Alternate Identifier(s):
 OSTI ID: 1429124
 Report Number(s):
 LLNLJRNL741938
Journal ID: ISSN 1070664X; 896317; TRN: US1901487
 Grant/Contract Number:
 AC5207NA27344; SC0014033; SC0016256; FG0204ER54746
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physics of Plasmas
 Additional Journal Information:
 Journal Volume: 25; Journal Issue: 3; Journal ID: ISSN 1070664X
 Publisher:
 American Institute of Physics (AIP)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; statistical analysis; stochastic processes; tokamaks; Fourier analysis; operator theory; thermodynamic processes; friction; fluid equations
Citation Formats
Ji, JeongYoung, and Joseph, Ilon. Electron parallel closures for the 3 + 1 fluid model. United States: N. p., 2018.
Web. doi:10.1063/1.5014996.
Ji, JeongYoung, & Joseph, Ilon. Electron parallel closures for the 3 + 1 fluid model. United States. doi:10.1063/1.5014996.
Ji, JeongYoung, and Joseph, Ilon. Fri .
"Electron parallel closures for the 3 + 1 fluid model". United States. doi:10.1063/1.5014996. https://www.osti.gov/servlets/purl/1458633.
@article{osti_1458633,
title = {Electron parallel closures for the 3 + 1 fluid model},
author = {Ji, JeongYoung and Joseph, Ilon},
abstractNote = {Linear closures are obtained for arbitrary collisionality for the 3 + 1 fluid model which includes the evolution of density, flow velocity, and pressure both parallel and perpendicular to a preferred direction, usually a magnetic field. A large set of 6400 moment equations is solved to provide closures that are accurate in the collisional regime and well into the collisionless regime. The closures in the collisionless limit are determined by solving the kinetic equation with a model collision operator. Simple fits for the kernel functions that define the closures are obtained for arbitrary collisionality in wave number space. The results are linearly accurate to within 3% across the entire range of collisionality.},
doi = {10.1063/1.5014996},
journal = {Physics of Plasmas},
number = 3,
volume = 25,
place = {United States},
year = {2018},
month = {3}
}
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