A Forward semi-Lagrangian Method for the Numerical Solution of the Vlasov Equation

Details A Forward semi-Lagrangian Method for the Numerical Solution of the Vlasov Equation A Forward semi-Lagrangian Method for the Numerical Solution of the Vlasov Equation

2008-11-18

arxiv.org/abs/0811.2875v1

Computer Physics Communications 180, 10 (2009) 1730-1745

Mathematics

Numerical Analysis

Scientific paper

10.1016/j.cpc.2009.04.024

This work deals with the numerical solution of the Vlasov equation. This equation gives a kinetic description of the evolution of a plasma, and is coupled with Poisson's equation for the computation of the self-consistent electric field. The coupled model is non linear. A new semi-Lagrangian method, based on forward integration of the characteristics, is developed. The distribution function is updated on an eulerian grid, and the pseudo-particles located on the mesh's nodes follow the characteristics of the equation forward for one time step, and are deposited on the 16 nearest nodes. This is an explicit way of solving the Vlasov equation on a grid of the phase space, which makes it easier to develop high order time schemes than the backward method.

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