A Multi-Domain Hybrid DG and WENO Method for Hyperbolic Conservation Laws on Hybrid Meshes

被引:8
|
作者
Cheng, Jian [1 ]
Liu, Tiegang [1 ]
机构
[1] Beihang Univ, LMIB, Sch Math & Syst Sci, Beijing 100191, Peoples R China
基金
中国国家自然科学基金;
关键词
Discontinuous Galerkin method; weighted essentially nonoscillatory scheme; hybrid method; conservation laws; DISCONTINUOUS GALERKIN METHOD; SPECTRAL DIFFERENCE METHOD; ONE-DIMENSIONAL SYSTEMS; FINITE-ELEMENT-METHOD; UNSTRUCTURED GRIDS; BASIC FORMULATION; DG/FV METHODS; COMPUTATIONAL AEROACOUSTICS; EULER EQUATIONS; SCHEMES;
D O I
10.4208/cicp.060313.300514a
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In [SIAMJ. Sci. Comput., 35(2)(2013), A1049-A1072], a class of multi-domain hybrid DG and WENO methods for conservation laws was introduced. Recent applications of this method showed that numerical instability may encounter if the DG flux with Lagrangian interpolation is applied as the interface flux during the moment of conservative coupling. In this continuation paper, we present a more robust approach in the construction of DG flux at the coupling interface by using WENO procedures of reconstruction. Based on this approach, such numerical instability is overcome very well. In addition, the procedure of coupling a DG method with a WENO-FD scheme on hybrid meshes is disclosed in detail. Typical testing cases are employed to demonstrate the accuracy of this approach and the stability under the flexibility of using either WENO-FD flux or DG flux at the moment of requiring conservative coupling.
引用
收藏
页码:1116 / 1134
页数:19
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