文章基本信息

标题：Numerical simulation of free water surface in pump intake
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作者：L J Zhao ; M Nohmi
期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2012
卷号：15
期号：5
出版社：IOP Publishing
摘要：The purpose of this paper is to verify the volume of fluid (VOF) method for simulating the free water surface flow in p ump intake. With the increasing computer power, VOF method has been becoming a more flexible and accurate choice to replace the conventional fixed water surface method, because it does not require assumptions on the nature of air-water interface. Two examples are presented in this paper. The first example is presented for simulating the growth of air-entrained vortices. LES (Large Eddy Simulation) model, instead o f RANS (Reynolds averaged Navier-Stokes) turbulence model, is used to capture the peak of circular velocity around the vortex core. Numerical result shows good agreement with the benchmark experiment carried by the Turbo machinery Society of Japan.The second example predicts the flow rate distribution in the pump intake consisting of one opened and two closed channels. VOF result is compared with the conventional fixed water surface method assuming free-slip boundary condition on the fluid interface. The difference o f flow pattern in the opened channel indicates that numerical flow field is affected remarkably b y the setup of boundary condition at air-water interface