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A kinetic Fokker–Planck approach for modeling variable hard-sphere gas mixtures

2020; American Institute of Physics; Volume: 10; Issue: 8 Linguagem: Inglês

10.1063/5.0017289

2158-3226

Christian Hepp, Martin Grabe, Klaus Hannemann,

Optical properties and cooling technologies in crystalline materials

Kinetic Fokker–Planck (FP) methods for modeling rarefied gas flows have received increasing attention over the last few years. However, formulating such models for realistic multi-species gases is still an open subject of research. Therefore, in this letter, we develop a kinetic FP model for describing gas mixtures with particles interacting according to the variable hard-sphere interaction potential. In accordance with the kinetic FP framework, a stochastic solution algorithm is employed in order to solve the model on a particle level. Different test cases are carried out, and the performance of the proposed method is compared with the direct simulation Monte Carlo algorithm.