A non-neutral generalized Ohm's law model for magnetohydrodynamics in the two-fluid regime

Crockatt, Michael M.; Shadid, John N.

doi:10.1063/5.0138673

Title: A non-neutral generalized Ohm's law model for magnetohydrodynamics in the two-fluid regime

Journal Article · 30 April 2023 · Physics of Plasmas

DOI: https://doi.org/10.1063/5.0138673 · OSTI ID:2311479

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Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Computing Research

Here, a new non-neutral generalized Ohm's law (GOL) model for atomic plasmas is presented. This model differs from previous models of this type in that quasi-neutrality is not assumed at any point. Collisional effects due to ionization, recombination, and elastic scattering are included, and an expression for the associated plasma conductivity is derived. An initial set of numerical simulations are considered that compare the GOL model to a two-fluid model in the ideal (collisionless) case. The results demonstrate that solutions obtained from the two models are essentially indistinguishable in most cases when the ion–electron mass ratio is within the range of physical values for atomic plasmas. Additionally, some limitations of the model are discussed.

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Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC); USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003525

OSTI ID:: 2311479

Report Number(s):: SAND--2023-03939J

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 30; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: A non-neutral generalized Ohm's law model for magnetohydrodynamics in the two-fluid regime

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