Communications on Applied Mathematics and Computation ›› 2023, Vol. 5 ›› Issue (1): 199-234.doi: 10.1007/s42967-021-00153-2

• ORIGINAL PAPERS • Previous Articles     Next Articles

A New Hybrid WENO Scheme with the High-Frequency Region for Hyperbolic Conservation Laws

Yifei Wan, Yinhua Xia   

  1. School of Mathematical Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
  • Received:2021-02-11 Revised:2021-06-01 Online:2023-03-20 Published:2023-03-08
  • Contact: Yinhua Xia,E-mail:yhxia@ustc.edu.cn;Yifei Wan,E-mail:wanyifei@mail.ustc.edu.cn E-mail:yhxia@ustc.edu.cn;wanyifei@mail.ustc.edu.cn

Abstract: In this paper, a new kind of hybrid method based on the weighted essentially non-oscillatory (WENO) type reconstruction is proposed to solve hyperbolic conservation laws. Comparing the WENO schemes with/without hybridization, the hybrid one can resolve more details in the region containing multi-scale structures and achieve higher resolution in the smooth region; meanwhile, the essentially oscillation-free solution could also be obtained. By adapting the original smoothness indicator in the WENO reconstruction, the stencil is distinguished into three types: smooth, non-smooth, and high-frequency region. In the smooth region, the linear reconstruction is used and the non-smooth region with the WENO reconstruction. In the high-frequency region, the mixed scheme of the linear and WENO schemes is adopted with the smoothness amplification factor, which could capture high-frequency wave efficiently. Spectral analysis and numerous examples are presented to demonstrate the robustness and performance of the hybrid scheme for hyperbolic conservation laws.

Key words: Hybrid schemes, WENO reconstruction, Smoothness indicator, Finite difference method

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