Improved multispecies Dougherty collisions

Abstract

The Dougherty model Fokker-Planck operator is extended to describe nonlinear full-f collisions between multiple species in plasmas. Simple relations for cross-species interactions 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, satisfies the H-Theorem unlike analogous Bhatnagar-Gross-Krook operators.

References in corpus (4)

• Linearized model Fokker-Planck collision operators for gyrokinetic simulations. I. Theory
• Conservative discontinuous Galerkin scheme of a gyro-averaged Dougherty collision operator
• Development of Advanced Linearized Gyrokinetic Collision Operators Using a Moment Approach
• Differential formulation of the gyrokinetic Landau operator

Cited by in corpus (5)

• Local Gyrokinetic Collisional Theory of the Ion-Temperature Gradient Mode
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• An investigation of shock formation versus shock mitigation of colliding plasma jets
• A Parallel-Kinetic-Perpendicular-Moment Model for Magnetized Plasmas
• Reduction of transport due to magnetic shear in gyrokinetic simulations of the scrape-off layer