Entropy-bounded discontinuous Galerkin scheme for Euler equations

JOURNAL OF COMPUTATIONAL PHYSICS

卷:295

Article

Lv, Yu¹  Ihme, Matthias¹ 

[1] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

关键词: Discontinuous Galerkin;    Shock-capturing;    Limiter;    Entropy principle;   

DOI  :  10.1016/j.jcp.2015.04.026

来源: Elsevier

【 摘 要 】

An entropy-bounded Discontinuous Galerkin (EBDG) scheme is proposed in which the solution is regularized by constraining the entropy. The resulting scheme is able to stabilize the solution in the vicinity of discontinuities and retains the optimal accuracy for smooth solutions. The properties of the limiting operator according to the entropy-minimum principle are proofed, and an optimal CFL-criterion is derived. We provide a rigorous description for locally imposing entropy constraints to capture multiple discontinuities. Significant advantages of the EBDG-scheme are the general applicability to arbitrary high-order elements and its simple implementation for multi-dimensional configurations. Numerical tests confirm the properties of the scheme, and particular focus is attributed to the robustness in treating discontinuities on arbitrary meshes. (C) 2015 Elsevier Inc. Allrightsreserved.

【 授权许可】

Free