Improved multispecies Dougherty collisions

Improved multispecies Dougherty collisions

The Dougherty model Fokker-Planck operator is extended to describe nonlinear full-f collisions between multiple species in plasmas. Simple relations for cross-species interactions are developed which obey conservation laws, and reproduce familiar velocity and temperature relaxation rates. This treat...

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Veröffentlicht in:arXiv.org 2022-03
Hauptverfasser: Francisquez, Manaure, Juno, James, Hakim, Ammar, Hammett, Gregory W, Ernst, Darin R
Format: Artikel
Sprache:eng
Schlagworte:
Collisions
Conservation laws
Mass ratios
Physics - Plasma Physics
Plasmas (physics)
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Zusammenfassung:The Dougherty model Fokker-Planck operator is extended to describe nonlinear full-f collisions between multiple species in plasmas. Simple relations for cross-species interactions are developed which obey conservation laws, and reproduce familiar velocity and temperature relaxation rates. This treatment of multispecies Dougherty collisions, valid for arbitrary mass ratios, satisfies the H-Theorem unlike analogous Bhatnagar-Gross-Krook operators.
ISSN:2331-8422
DOI:10.48550/arxiv.2109.10381