An MPS-based particle method for simulation of multiphase flows characterized by high density ratios by incorporation of space potential particle concept
An MPS-based particle method for simulation of multiphase flows characterized by high density ratios by incorporation of space potential particle concept
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DOI：
10.1016/j.camwa.2018.06.002
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发表时间：
2018-09
期刊：
影响因子：
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通讯作者：
Y. Shimizu;H. Gotoh;Abbas Khayyer
中科院分区：
文献类型：
--
作者：
Y. Shimizu;H. Gotoh;Abbas Khayyer
针对高密度比多相流的特点，采用精细粒子法进行了数值模拟。该方法是在运动粒子半隐式（MPS）方法的基础上提出的，MPS是一种基于投影的粒子方法。该方法采用空间势粒子（SPP）概念，采用轻/重相耦合的一致性方案，采用两步解耦计算算法。所提出的耦合方案保证了相界面处压力和空间（体积守恒）的连续性，而不需要通常应用的密度平滑/平均方案或数值稳定项的应用。通过4个基准试验的仿真验证了所提出的多相粒子方法，结果表明该方法具有良好的精度和收敛性。
Simulation of multiphase flows characterized by high density ratios is targeted by using a refined particle method. The proposed method is founded on Moving Particle Semi-implicit (MPS) method which is a projection-based particle method. The proposed method comprises of a decoupled two-step computational algorithm through application of a consistent scheme for coupling the light/heavy phases by incorporating the concept of Space Potential Particles (SPP). The proposed coupling scheme guarantees the continuity of pressure and space (volume conservation) at the phase interface without any need for commonly applied density smoothing/averaging schemes or application of numerical stabilizing terms. Verification of the proposed multiphase particle method is conducted through the simulations of four benchmark tests and the method is shown to possess acceptable accuracy and convergence properties.