水科学进展2017，Vol.28Issue(6)：868-878,11.DOI:10.14042/j.cnki.32.1309.2017.06.008
基于结构网格的溃坝水流数值模拟
Numerical simulation of dam-break flow based on structured grids
摘要
Abstract
A finite volume model based on structured grids is proposed for numerical simulation of dam-break flow o-ver complex terrains with irregular boundaries in the study. In the proposed model, HLLC′s approximate Riemann so-lution is used to compute the flow flux based on the two-dimensional shallow-water equations with conservation. The spatial and temporal precisions of the model are increased to the second-order precision by the MUSCL-Hancock meth-od. Slope source terms and friction source terms are discretized in order to guarantee the model′s stability. A robust procedure is introduced to efficiently and accurately simulate the movement of wet/ dry fronts and water flow character-istics of complex terrains with irregular boundaries. Finally, flume experiments, physical models and actual case com-putation are used to verify the proposed model. Numerical results of dam-break flow from different test examples are highly consistent with observations and numerical results obtained by existing models, indicating that the proposed model has the higher stability and precision for a wide range of applications.关键词
复杂边界/结构网格/浅水方程/干湿界面/有限体积法Key words
complex boundary/structured grid/shallow water equations/wet/ dry fronts/finite volume method分类
建筑与水利引用本文复制引用
曹引,冶运涛,梁犁丽,蒋云钟,赵红莉,王浩,严登明..基于结构网格的溃坝水流数值模拟[J].水科学进展,2017,28(6):868-878,11.基金项目
国家重点研发计划资助项目(2017YFC0405801) （2017YFC0405801）
国家自然科学基金资助项目(51309254)The study is financially supported by the National Key R&D Program of China (No. 2017YFC0405801) and the National Natural Science Foundation of China (No. 51309254). （51309254）
