期刊
COMPUTER PHYSICS COMMUNICATIONS
卷 180, 期 6, 页码 861-872出版社
ELSEVIER
DOI: 10.1016/j.cpc.2008.12.004
关键词
Smoothed Particle Hydrodynamics; Weak-compressibility; Free surface flows; SPH pressure evaluation; Fluid-structure impact problems; Convergence tests
In literature, it is well know that the Smoothed Particle Hydrodynamics method can be affected by numerical noise on the pressure field when dealing with liquids. This can be highly dangerous when all SPH code is dynamically coupled with a structural solver. In this work a simple procedure is proposed to improve the computation of the pressure distribution in the dynamics of liquids. Such a procedure is based on the use of a density diffusion term in the equation for the mass conservation. This diffusion is a pure numerical effect, similar to the well known artificial viscosity originally proposed in SPH method to smooth out the shock discontinuities. As the artificial viscosity, the density diffusion used here goes to zero increasing the number of particles recovering consistency and convergence of the final numerical scheme adopted. Different artificial density diffusion formulas have been studied, paying attention to prevent unphysical changes of the flows. To show the improvements of the new scheme proposed here, a suitable set of examples. for which reference solutions or experimental data are available, has been tested. (C) 2008 Elsevier B.V. All rights reserved
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据