Abstract

Contributed Talk - Splinter Computational

Thursday, 12 September 2024, 15:15   (S26)

A particle transport code combining a spherical harmonic expansion and the discontinuous Galerkin method

Nils W. Schween, Florian Schulze, Brian Reville
Max-Planck-Insitut für Kernphysik

We present an open-source code designed to numerically solve the Vlasov–Fokker–Planck equation for astrophysi- cal applications. It is called Sapphire++ and it employs a numerical algorithm based on a spherical harmonic expansion of the distribution function, expressing the Vlasov–Fokker–Planck equation as a system of partial differential equations governing the evolution of the expan- sion coefficients. The code uses the discontinuous Galerkin method together with implicit and explicit time stepping methods to compute these coefficients, providing significant flexibility in its choice of spatial and temporal accuracy.