Electron parallel closures for the 3 + 1 fluid model
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.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); Univ. of Washington, Seattle, WA (United States). Plasma Science and Innovation Center (PSI-Center)
- Grant/Contract Number:
- AC52-07NA27344; SC0014033; SC0016256; FG02-04ER54746
- OSTI ID:
- 1458633
- Alternate ID(s):
- OSTI ID: 1429124
- Report Number(s):
- LLNL-JRNL-741938; 896317; TRN: US1901487
- Journal Information:
- Physics of Plasmas, Vol. 25, Issue 3; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
An introductory guide to fluid models with anisotropic temperatures. Part 2. Kinetic theory, Padé approximants and Landau fluid closures
|
journal | December 2019 |
Similar Records
Closures for Two-fluid Five-moment Equations for Magnetized Plasmas (Final Scientific Report)
Electron parallel transport for arbitrary collisionality