Dataset from: Improved multispecies Dougherty collisions
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); PPPL
- Univ. of Iowa, Iowa City (United States). Dept. of Physics and Astronomy
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
The Dougherty model Fokker-Planck operator is extended to describe nonlinear full-f collisions between multiple species in plasmas. Simple relations for cross-species primitive moments 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, avoids unphysical temperatures and satisfies the H-theorem unlike an analogous Bhatnagar-Gross-Krook operator. Formulas for both a Cartesian velocity-space and a gyroaveraged operator are provided for use in Vlasov as well as long-wavelength gyrokinetic models. We present an algorithm for the discontinuous Galerkin discretization of this operator, and provide results from relaxation and Landau damping benchmarks.
- Research Organization:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC02-09CH11466; SC0018429
- OSTI ID:
- 1897995
- Country of Publication:
- United States
- Language:
- English
| Dataset from: Improved multispecies Dougherty collisions | dataset | January 2022 |
Improved multispecies Dougherty collisions
|
journal | May 2022 |
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