Coupled modeling of sediment-laden flows based on local-time-step approach

被引：3

作者：

Hu P. ^{[1
]}

Han J.-J. ^{[1
]}

Lei Y.-L. ^{[1
]}

机构：

[1] Ocean College, Zhejiang University, Zhoushan

来源：

Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2019年 / 53卷 / 04期

关键词：

Computational efficiency; Coupled model for sediment-laden flows; Finite volume method; Local-time-step;

D O I：

10.3785/j.issn.1008-973X.2019.04.015

中图分类号：

学科分类号：

摘要：

A new coupled model for sediment-laden flows was established with high computational efficiency by using the local-time-step (LTS) technology (i.e., using locally allowable maximum time step for variable updating at each cell). The governing equations that fully consider the interactions among the water flow, sediment transport and bed topography, were discretized by the finite volume method on unstructured triangular meshes. The inter-cell numerical fluxes were estimated by the HLLC approximate Riemann solver. The numerical case studies of dam-break floods over mobile bed suggested a reduction of the computational cost by 68% when adopting an appropriate LTS level. Engineering application of the model to the Taipingkou waterway of the Changjiang River led to a 92% reduction in the computational cost without losing quantitative accuracy. © 2019, Zhejiang University Press. All right reserved.

引用

页码：743 / 752

页数：9

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