Chinese Journal of Computational Physics ›› 2024, Vol. 41 ›› Issue (4): 453-462.DOI: 10.19596/j.cnki.1001-246x.8744

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Well-balanced Preserving of CCWENO-type High Order Entropy Stable Schemes for Shallow Water Equations

Shasha LIU(), Supei ZHENG(), Chengzhi ZHANG, Jianhu FENG   

  1. School of Science, Chang'an University, Xi'an, Shaanxi 710064, China
  • Received:2023-04-11 Online:2024-07-25 Published:2024-08-24
  • Contact: Supei ZHENG

Abstract:

The shallow water equations with source term have steady-state solution. The numerical scheme for solving this kind of equations must have well-balanced property, otherwise it will cause oscillation. For the bottom-non-flat shallow water with source term, this paper studies the well-balanced property of the high order compact central weighted essentially non-oscillatory (CCWENO) entropy stable scheme, and proves its well-balanced property. The theory is verified by one- and two-dimensional numerical examples. The numerical results show that the high order CCWENO scheme has the well-balanced property and can accurately capture the small perturbation of the solution even based on the coarse grid.

Key words: well-balanced, entropy stable scheme, shallow water equations, CCWENO reconstruction, hydrostatic equilibrium state

CLC Number: