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1.
  • Bobylev, Alexander, 1947-, et al. (författare)
  • DSMC Methods for Multicomponent Plasmas
  • 2012. - 1
  • Ingår i: DSMC and Related Simulations. - New York : American Institute of Physics (AIP). - 9780735411159 ; , s. 541-548
  • Konferensbidrag (refereegranskat)abstract
    • A general approach to Monte Carlo methods for Coulomb collisions is proposed. Its key idea is an approximation of the Landau-Fokker-Planck equations by the Boltzmann equations of a quasi-Maxwellian kind. This means that the total collision frequency for the corresponding Boltzmann equation does not depend on velocities. This allows one to make the simulation process very simple since the collision pairs can be chosen arbitrarily, without restriction. It is shown that this approach includes (as particular cases) the well-known methods of Takizuka & Abe(1977) and Nanbu(1997) and generalizes the approach of Bobylev & Nanbu(2000). The numerical scheme of this paper is simpler than the schemes by Takizuka & Abe and by Nanbu. We derive it for the general case of multicomponent plasmas
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2.
  • Bobylev, Alexander, 1947-, et al. (författare)
  • DSMC Modeling of a Single Hot Spot Evolution Using the Landau-Fokker-Planck Equation
  • 2014
  • Ingår i: Acta Applicandae Mathematicae - An International Survey Journal on Applying Mathematics and Mathematical Applications. - : Springer Science and Business Media LLC. - 0167-8019 .- 1572-9036. ; 132:1, s. 107-116
  • Tidskriftsartikel (refereegranskat)abstract
    • Numerical solution of a fully nonlinear one dimensional in space and three dimensional in velocity space electron kinetic equation is presented. Direct Simulation Monte Carlo (DSMC) method used for the nonlinear Landau-Fokker-Planck (LFP) collision operator is combined with Particle-in-Cell (PiC) simulations. An assumption of a self-consistent ambipolar electric field is used. The illustrative simulation results for the relaxation of the initial temperature perturbation are compared with the antecedent analytical and numerical results.
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