Conservative Discontinuous Galerkin/Hermite Spectral Method for the Vlasov–Poisson System

Abstract

We propose a class of conservative discontinuous Galerkin methods for the Vlasov–Poisson system written as a hyperbolic system using Hermite polynomials in the velocity variable. These schemes are designed to be systematically as accurate as one wants with provable conservation of mass and possibly total energy. Such properties in general are hard to achieve within other numerical method frameworks for simulating the Vlasov–Poisson system. The proposed scheme employs the discontinuous Galerkin discretization for both the Vlasov and the Poisson equations, resulting in a consistent description of the distribution function and the electric field. Numerical simulations are performed to verify the order of the accuracy and conservation properties.

Funding

H2020 Euratom(633053); Science Challenge Project(TZ2016002); National Natural Science Foundation of China(11971025); Natural Science Foundation of Fujian Province(2019J06002); NSAF Joint Fund(U1630247)