A sharp interface method for SPH
A sharp interface method for SPH
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DOI：
10.1016/j.jcp.2015.09.015
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
Mingyu Zhang;Xiaolong Deng
中科院分区：
文献类型：
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作者：
Mingyu Zhang;Xiaolong Deng
发展了光滑粒子流体动力学（SPH）的锐界面方法（SIM），用于模拟具有清晰界面的两相流动。引入水平集函数隐式地捕获接口。界面速度被用来发展水平集函数。水平集函数的光滑性有助于提高界面曲率的精度。界面上的材料不连续性用虚流体方法处理。界面态的计算通过应用跳跃条件，并扩展到相应的幽灵流体粒子。虚拟流体法有助于在界面附近获得光滑稳定的计算。基准测试验证了所开发的方法的性能。所开发的SPH模型可以准确、稳定地模拟低速、高密度、界面清晰的两相流。
A sharp interface method (SIM) for smoothed particle hydrodynamics (SPH) has been developed to simulate two-phase flows with clear interfaces. The level set function is introduced to capture the interface implicitly. The interface velocity is used to evolve the level set function. The smoothness of the level set function helps to improve the accuracy of the interface curvature. Material discontinuity across the interface is dealt with by the ghost fluid method. The interface states are calculated by applying the jump conditions and are extended to the corresponding ghost fluid particles. The ghost fluid method helps to get smooth and stable calculation near the interface. The performance of the developed method is validated by benchmark tests. The developed SIM for SPH can be applied to simulate low speed two-phase flows of high density ratios with clear interface accurately and stably.