| 一种新型三维水流数值模型 |
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| 引用本文： | 黄筱云,李绍武,夏波.一种新型三维水流数值模型[J].海洋学报,2010,32(6):167-173. |
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| 作者姓名： | 黄筱云 李绍武 夏波 |
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| 作者单位： | 1.天津大学 建筑工程学院,天津 300072; 长沙理工大学 水利工程学院 湖南 长沙 410114 |
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| 基金项目： | 水沙科学与水灾害防治湖南省重点实验室开放基金资助(2008SS07)。 |
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| 摘 要： | 以不可压缩流体的N-S方程为基本控制方程,用快速粒子level set方法(FPLS)追踪自由表面,提出了一种新的三维水流数值模型。在自由表面处应用虚拟压力法来封闭压力泊松方程,同时用速度等值外插的方法构造自由表面外侧的虚拟速度分布。通过模拟水波振荡、水柱崩塌、水滴滴落和空箱注水过程证明了模型的有效性。
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| 关 键 词： | 自由表面流 快速粒子levelset法 虚拟压力法 速度等值外插 |
| 收稿时间： | 2010/3/11 0:00:00 |
| 修稿时间： | 2010/6/17 0:00:00 |
A new three-dimensional numerical model for stream |
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| HUANG Xiao-yun,LI Shao-wu and XIA Bo.A new three-dimensional numerical model for stream[J].Acta Oceanologica Sinica (in Chinese),2010,32(6):167-173. |
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| Authors: | HUANG Xiao-yun LI Shao-wu and XIA Bo |
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| Institution: | 1.School of Civil Engineering, Tianjin University, Tianjin 300072, China; School of Hydraulic Engineering,Changsha University of Science and Technology,Changsha 410114,China2.School of Civil Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | A new numerical model for three-dimensional flow is proposed, in which the Navier-Stokes (N-S) equations of incompressible fluid are solved as the governing equations for flow movement, and a fast particle level set method is adopted for free surface tracking. The N-S equations are solved only in the liquid phase for saving computational time. A ghost pressure method is utilized to close the Poisson equation on the free surface and the simple extrapolation of velocity is applied to obtaining the ghost velocity field out of the water domain. The flow model is verified by the modeled results of oscillatory flow, collapse of water column, impact of water drop and water infusion. |
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| Keywords: | free surface flow fast particle level set ghost pressure method simple extrapolation of velocity |
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