Electron parallel closures for arbitrary collisionality
Abstract
Electron parallel closures for heat flow, viscosity, and friction force are expressed as kernel-weighted integrals of thermodynamic drives, the temperature gradient, relative electron-ion flow velocity, and flow-velocity gradient. Simple, fitted kernel functions are obtained for arbitrary collisionality from the 6400 moment solution and the asymptotic behavior in the collisionless limit. The fitted kernels circumvent having to solve higher order moment equations in order to close the electron fluid equations. For this reason, the electron parallel closures provide a useful and general tool for theoretical and computational models of astrophysical and laboratory plasmas.
- Authors:
-
- Department of Physics, Utah State University, Logan, Utah 84322 (United States)
- Publication Date:
- OSTI Identifier:
- 22403330
- Resource Type:
- Journal Article
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 21; Journal Issue: 12; 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; CLOSURES; ELECTRONS; HEAT FLUX; IONS; KERNELS; TEMPERATURE GRADIENTS; VELOCITY
Citation Formats
Ji, Jeong-Young, and Held, Eric D. Electron parallel closures for arbitrary collisionality. United States: N. p., 2014.
Web. doi:10.1063/1.4904906.
Ji, Jeong-Young, & Held, Eric D. Electron parallel closures for arbitrary collisionality. United States. https://doi.org/10.1063/1.4904906
Ji, Jeong-Young, and Held, Eric D. 2014.
"Electron parallel closures for arbitrary collisionality". United States. https://doi.org/10.1063/1.4904906.
@article{osti_22403330,
title = {Electron parallel closures for arbitrary collisionality},
author = {Ji, Jeong-Young and Held, Eric D.},
abstractNote = {Electron parallel closures for heat flow, viscosity, and friction force are expressed as kernel-weighted integrals of thermodynamic drives, the temperature gradient, relative electron-ion flow velocity, and flow-velocity gradient. Simple, fitted kernel functions are obtained for arbitrary collisionality from the 6400 moment solution and the asymptotic behavior in the collisionless limit. The fitted kernels circumvent having to solve higher order moment equations in order to close the electron fluid equations. For this reason, the electron parallel closures provide a useful and general tool for theoretical and computational models of astrophysical and laboratory plasmas.},
doi = {10.1063/1.4904906},
url = {https://www.osti.gov/biblio/22403330},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 12,
volume = 21,
place = {United States},
year = {Mon Dec 15 00:00:00 EST 2014},
month = {Mon Dec 15 00:00:00 EST 2014}
}
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