Moments of the Boltzmann collision operator for Coulomb interactions
SCIE
SCOPUS
- Title
- Moments of the Boltzmann collision operator for Coulomb interactions
- Authors
- Ji, Jeong-Young; Lee, Min Uk; Held, Eric D.; Yun, Gunsu S.
- Date Issued
- 2021-07
- Publisher
- AIP Publishing
- Abstract
- Exact moments of the Boltzmann collision operator are calculated in the irreducible Hermitian moment expansion written in terms of the random-velocity variable of each species. The formulas are presented in closed, algebraic form and can be straightforwardly implemented in computer algebra systems. They are valid for two arbitrary masses, temperatures, and flow velocities, and hence include all other existing results derived for distribution functions expanded with respect to reference states of one temperature and flow velocity. In comparison, the Landau collisional moments are good approximations for large Coulomb logarithm and small relative flow velocity, but they fail to predict the correct behavior of most collisional moments for large relative flow even for weakly coupled plasmas.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/107466
- DOI
- 10.1063/5.0054457
- ISSN
- 1070-664X
- Article Type
- Article
- Citation
- PHYSICS OF PLASMAS, vol. 28, no. 7, page. 1ENG, 2021-07
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- There are no files associated with this item.
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