Embedded discontinuous Galerkin transport schemes with localised limiters

JOURNAL OF COMPUTATIONAL PHYSICS

卷:311

Article

Cotter, C. J.¹  Kuzmin, D.² 

[1] Univ London Imperial Coll Sci Technol & Med, Dept Math, South Kensington Campus, London SW7 2AZ, England

[2] Dortmund Univ Technol, Inst Appl Math, Vogelpothsweg 87, D-44227 Dortmund, Germany

关键词: Discontinuous Galerkin;    Slope limiters;    Flux corrected transport;    Convection-dominated transport;    Numerical weather prediction;   

DOI  :  10.1016/j.jcp.2016.02.021

来源: Elsevier

【 摘 要 】

Motivated by finite element spaces used for representation of temperature in the compatible finite element approach for numerical weather prediction, we introduce locally bounded transport schemes for (partially-) continuous finite element spaces. The underlying high-order transport scheme is constructed by injecting the partially-continuous field into an embedding discontinuous finite element space, applying a stable upwind discontinuous Galerkin (DG) scheme, and projecting back into the partially-continuous space; we call this an embedded DG transport scheme. We prove that this scheme is stable in L-2 provided that the underlying upwind DG scheme is. We then provide a framework for applying limiters for embedded DG transport schemes. Standard DG limiters are applied during the underlying DG scheme. We introduce a new localised form of element-based flux-correction which we apply to limiting the projection back into the partially-continuous space, so that the whole transport scheme is bounded. We provide details in the specific case of tensor-product finite element spaces on wedge elements that are discontinuous P1/Q1 in the horizontal and continuous P2 in the vertical. The framework is illustrated with numerical tests. (C) 2016 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

【 授权许可】

Free