CCWENO型高阶熵稳定格式的保平衡性

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

  • 摘要: 针对带源项的底部非平坦浅水波方程,本文对高阶紧致中心加权基本无振荡(CCWENO)型熵稳定格式的保平衡性进行研究,证明了格式的保平衡性,通过一维和二维数值算例进行验证。数值结果表明:高阶CCWENO型熵稳定格式具有保平衡性,即便在较粗网格下也能够准确捕捉解的微小扰动。

     

    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.

     

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