Multispecies structure-preserving particle discretization of the Landau collision operator
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2022-12-14
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en
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11
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Physics of Plasmas, Volume 29, issue 12
Abstract
This paper proposes a novel numerical integrator for modeling multispecies Coulomb collisions in kinetic plasmas. The proposed scheme provides an energy-, momentum-, and positivity-preserving particle discretization of the nonlinear Landau collision operator, extending the works of Carrillo et al. [J. Comput. Phys. 7, 100066 (2020)] and Hirvijoki [Plasma Phys. Controlled Fusion 63, 044003 (2021)]. The discrete-time conservation properties are analyzed both algebraically and numerically, and an efficient, graphics processing unit-parallelized implementation is validated against inhomogeneous temperature relaxation, isotropization, and thermalization examples. The results agree with analytical estimates, confirming the method capable of reproducing physics.Description
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Zonta, F, Pusztay, J V & Hirvijoki, E 2022, ' Multispecies structure-preserving particle discretization of the Landau collision operator ', Physics of Plasmas, vol. 29, no. 12, 123906 . https://doi.org/10.1063/5.0105182