A projection-based particle method with optimized particle shifting for multiphase flows with large density ratios and discontinuous density fields
A projection-based particle method with optimized particle shifting for multiphase flows with large density ratios and discontinuous density fields
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DOI：
10.1016/j.compfluid.2018.10.018
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发表时间：
2019-01
影响因子：
2.8
通讯作者：
Abbas Khayyer;H. Gotoh;Y. Shimizu
中科院分区：
文献类型：
--
作者：
Abbas Khayyer;H. Gotoh;Y. Shimizu
提出了一种新的基于投影的粒子方法，用于模拟具有大密度比和相界面不连续密度场的多相流。该方法考虑了多流体连续系统，并包括一个特定的计算算法，该算法利用最近开发的优化粒子移位（OPS [1]）方案来保持相界面和自由表面处粒子的规则性。该方法是建立在移动粒子半隐式（MPS [2]）作为基于投影的粒子方法的改进版本。一组先前开发的改进方案也被采用，因此，所提出的方法被称为改进MPS + OPS。通过几个基准测试，在精度、能量守恒性和收敛性方面进行了定性和定量的验证。
A novel projection-based particle method is presented for simulation of multiphase flows characterized by large density ratios and discontinuous density fields at the phase interface. The method considers a multi-fluid continuous system and comprises of a specific computational algorithm utilizing the recently developed Optimized Particle Shifting (OPS [1]) scheme to maintain the regularity of particles at the phase interface and free-surface. The method is founded on an improved version of Moving Particle Semi-implicit (MPS [2]) as a projection-based particle method. A set of previously developed improved schemes are also adopted and hence the proposed method is referred to as improved MPS + OPS. Validations are made both qualitatively and quantitatively in terms of accuracy, energy conservation properties as well as convergence properties by consideration of several benchmark tests.