Implicit and conservative difference scheme for the Fokker-Planck equation
Journal of Computational Physics
An implicit energy-conservative 2D Fokker-Planck algorithm: I. difference scheme
Journal of Computational Physics
An implicit energy-conservative 2D Fokker-Planck algorithm: II. Jacobian-free Newton—Krylov solver
Journal of Computational Physics
Numerical algorithms for axisymmetric Fokker-Planck-Landau operators
Journal of Computational Physics
Journal of Computational Physics
Fast spectral methods for the Fokker-Planck-Landau collision operator
Journal of Computational Physics
Iterative Methods for Sparse Linear Systems
Iterative Methods for Sparse Linear Systems
Journal of Computational Physics
Nonlinear magnetohydrodynamics simulation using high-order finite elements
Journal of Computational Physics
A high-order finite-volume algorithm for Fokker-Planck collisions in magnetized plasmas
Journal of Computational Physics
High order resolution of the Maxwell-Fokker-Planck-Landau model intended for ICF applications
Journal of Computational Physics
Hi-index | 31.45 |
A method is proposed for a finite element/Fourier solution of the Fokker-Planck (FP) equation describing Coulomb collisions between particles in a fully ionized, spatially homogeneous plasma. A linearized FP equation is obtained by assuming collisions between test particles and a static background are more important than between the test particles themselves. A full 3D velocity space dependence is maintained using cylindrical coordinates (v"@?,v"@?,@c). When a magnetic field exists, v"@? is aligned with it and @c corresponds to gyroangle. Distribution functions are approximated by a Fourier representation in the azimuthal angle, @c, and by a 2D finite element representation in the parallel and perpendicular directions. The FP equation can be solved in a fully implicit manner allowing large, stable timesteps and simulations that arrive quickly at equilibrium solutions. The results of several test problems are discussed including a calculation of the resistivity of a Lorentz plasma, the heating and cooling of a test particle distribution, the slowing down of a beam of test particles and the acquisition of a perpendicular flow for a non-flowing Maxwellian test distribution. Robust convergence upon refinement of the finite element/Fourier representation is highlighted.