A weakly compressible SPH method based on a low-dissipation Riemann solver
A weakly compressible SPH method based on a low-dissipation Riemann solver
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DOI：
10.1016/j.jcp.2017.01.027
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发表时间：
2017-04
期刊：
影响因子：
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通讯作者：
Chi Zhang;Xiangyu Y. Hu;N. Adams
中科院分区：
文献类型：
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作者：
Chi Zhang;Xiangyu Y. Hu;N. Adams
本文提出了一种低耗散弱可压缩SPH方法，用于模拟自由表面流动中的碰撞和破碎等剧烈事件。其核心思想是修改黎曼解，通过一个简单的限制器来确定粒子之间的相互作用，以减少固有的数值耗散。修改后的黎曼求解器也延长施加壁边界条件。数值试验表明，该方法能准确地求解自由表面流动，产生光滑、精确的压力场。该方法是兼容的流体静力学的解决方案，并表现出相当少的数值阻尼的机械能比以前的方法。
We present a low-dissipation weakly-compressible SPH method for modeling free-surface flows exhibiting violent events such as impact and breaking. The key idea is to modify a Riemann solver which determines the interaction between particles by a simple limiter to decrease the intrinsic numerical dissipation. The modified Riemann solver is also extended for imposing wall boundary conditions. Numerical tests show that the method resolves free-surface flows accurately and produces smooth, accurate pressure fields. The method is compatible with the hydrostatic solution and exhibits considerably less numerical damping of the mechanical energy than previous methods.