A hierarchical reconstruction for DG/FV method with low dispersion: Basic formulation and applications
Artikel i vetenskaplig tidskrift, 2021

In this paper, the numerical dispersion of a hierarchical reconstruction strategy for DG/FV method has been optimized. For the hierarchical strategy, the cell averages and the first derivatives are reconstructed based on the Hermite WENO method; the second derivatives are reconstructed via Green-Gauss integration and WENO reconstruction. Then, the numerical dispersion has been optimized by minimizing error with bandwidth optimization technique. Furthermore, to adjust the loss of compactness due to the reconstructed second derivatives, two modifications were also proposed with optimal weights. Eventually, from the implementations in scalar and compressible Euler equations, the superiority of numerical dispersion and accuracy of present methods could be validated. The shock capturing capacity has also been validated in 1D and 2D cases.

Dispersion control

Hermite WENO

DG/FV method

Hierarchical reconstruction


Ming Zhao

Tianjin University

Xian Wang

Tianjin University

Xiaojian Li

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Tianjin University

Zhengxian Liu

Tianjin University

Wei Liu

University of Electronic Science and Technology of China

Ke Yang

Chinese Academy of Sciences

Computers and Fluids

00457930 (ISSN)

Vol. 231 105175




Matematisk analys



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