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一种新型三维水流模型
A new 3D numerical flow model
投稿时间:2010-03-11  修订日期:2010-06-17
DOI:
中文关键词:  自由表面流,FPLS,虚拟压力法,速度等值外插
英文关键词:free surface fluid flow, FPLS, ghost pressure method, simple extrapolation of velocity
基金项目:
作者单位邮编
黄筱云 天津大学 300072
李绍武* 天津大学 300072
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中文摘要:
      以不可压缩流体的N-S方程为基本控制方程,采用快速粒子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,同时采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。通过模拟水柱崩塌、水滴滴落和空箱注水过程证明了模型的有效性。
英文摘要:
      A new 3D numerical flow model is proposed, in which only the N-S equations of incompressible fluid are solved for the liquid phase. By doing so, computation time is saved. The FPLS method is adopted to track the free surface,a ghost pressure method is utilized to close the Poisson equation on the free surface and the simple extrapolation of velocity is applied to obtain the ghost velocity field out of free surface. The flow model is verified by the modeled results of collapse of water column, impact of water drop and water infusion.
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