Reformulation of the Resistive MHD System for Ensuring Discrete Preservation of Constraints


Daniel R. Reynolds
Department of Mathematics
UCSD

Abstract

We investigate the system of partial differential equations used in resistive magnetohydrodynamic modeling of fusion plasmas. This system couples the Euler and Maxwell equations for evolution of a charged fluid in an electromagnetic field, hence the magnetic field in the resulting PDE system must evolve on a divergence-free constraint manifold. As traditional numerical solution approaches often violate these constraints, we investigate a reformulation of the resistive MHD system to allow for accurate evolution of the continuum-level equations, while simultaneously ensuring that the solution satisfies the solenoidal constraint.