Implicit-explicit, realizability-preserving first-order scheme for moment models with Lipschitz-continuous source terms

Abstract

We derive an implicit-explicit (IMEX), realizability-preserving first-order scheme for moment models with Lipschitz-continuous source terms. In contrast to fully-explicit schemes the time step does not depend on the physical parameters, removing the stiffness from the system. Furthermore, a wider class of collision operators (e.g. the Laplace-Beltrami operator) can be used. The derived scheme is applied to minimum-entropy models.

References in corpus (3)

• Kershaw closures for linear transport equations in slab geometry I: model derivation
• Partial-moment minimum-entropy models for kinetic chemotaxis equations in one and two dimensions
• Kershaw closures for linear transport equations in slab geometry II: high-order realizability-preserving discontinuous-Galerkin schemes