A CFD model for numerical simulation of violent impact flow
A robust and accurate 3D CIP-based model is developed, capable of capturing correctly complex three-dimensional free surface flows and, even more important, also capable of predicting an accurate pressure force.The flow is represented by one set of governing equations, which are solved numerically on a non-uniform, staggered Cartesian grid by a high-order finite difference method.The governing equations are divided into an advection step and two non-advection steps by making use of a time splitting method.A CIP method is adopted to calculate the hyperbolic equation for velocity at the advection step.The free surface is immersed in the computation domain and expressed by a one-fluid density function.With this treatment the dynamic conditions at the free surface are automatically satisfied.The validity and utility of the numerical model are demonstrated by applying it to a 3-D dam-breaking problem and compared with a performed experiment.Three free surface capturing methods-VOF, CIP and THINC-are used for the interface capturing.Main attention is paid to the free surface and impact pressure.Numerical results show that the present CFD model is both robust and accurate for violent impact free-surface flow.
CIP method Free surface flow Wave breaking Dam breaking Water impact
ZHAO Xi-zeng HU Chang-hong
Department of Ocean Science and Engineering, Zhejiang University, Hangzhou 310058 RIAM, Kyushu University, Kasuga Fukuoka, 816-8580
国内会议
第十一届全国水动力学学术会议暨第二十四届全国水动力学研讨会并周培源诞辰110周年纪念大会
无锡
英文
304-309
2012-08-25（万方平台首次上网日期，不代表论文的发表时间）