计算物理 ›› 2015, Vol. 32 ›› Issue (5): 561-571.
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张景新1,2
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ZHANG Jingxin1,2
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摘要: 将分离涡模型(DES),即一种RANS和LES的混合模型,应用于带自由表面的地表水流运动,建立一套数值仿真模型.模型基于有限体积法,水平面内采用非结构计算网格,垂向为结构化网格,对流项离散格式采用二阶TVD格式,并行基于Open MP语言库.算例表明DES模型有助于揭示复杂地形条件下带自由表面水流的大涡拟序结构.
关键词: 分离涡, 拟序结构, 自由表面流动, 动压模型
Abstract: A detached-eddy simulation (DES) model is proposed based on a fully hydrodynamic pressure model instead of hydrostatic model. The numerical scheme is based on finite volume method (FVM) on unstructured grids in the horizontal plane, and σ coordinate in vertical direction to fix free surface and uneven bottom. The in-house codes are paralleled using OpenMP. The proposed model is shown particularly effective in prediction of small-scale vortical structures.
Key words: detached eddy simulation, coherent structure, free surface flow, hydrodynamic model
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O352
张景新. 复杂地形下带自由表面水流的分离涡模拟[J]. 计算物理, 2015, 32(5): 561-571.
ZHANG Jingxin. A Detached Eddy Simulation Model for Free Surface Flows with Uneven Bottom[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2015, 32(5): 561-571.
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