An effect non-staggered central scheme based on new hydrostatic reconstruction

Jian Dong and Ding Fang Li

Applied Mathematics and Computation, 2020, vol. 372, issue C

Abstract: A non-staggered second-order accurate central scheme based on new hydrostatic reconstruction (HR) for the shallow water equation (SWE) with dry–wet fronts is presented. The well-balanced property maybe missed if the discretization of the source term based on an invariable water surface level on the staggered cell. We propose a novel discretization of the source term based on new hydrostatic reconstruction to ensure the well-balanced property on the staggered cell. To evolve the numerical solutions on a single grid and satisfy the well-balanced property, we construct a map between the water surface level and its cell average on the staggered cell. The positivity preserving property is achieved by providing an appropriate CFL condition. A number of classical problems for the SWE are successfully solved.

Keywords: Saint-Venant system; Non-staggered central scheme; Finite volume method; Well-balanced; Positivity preserving (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:apmaco:v:372:y:2020:i:c:s0096300319309841

DOI: 10.1016/j.amc.2019.124992

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