Large-scale simulations for gas-liquid two-phase flow-structure interaction using GPU supercomputer

尽管包括气液界面在内的两相流动具有未知的复杂动力学，但由于并行计算的效率较低，很难对其进行高空间分辨率的数值计算研究。利用大量具有高计算能力的图形处理器，通过引入一种新的CLSVOF方法、多网格预条件BiCGSTAB压力泊松求解器和IBM(浸没边界法)，开发了高分辨率的气液两相流动数值模拟软件。为了获得高的并行可伸缩性，计算和通信之间的重叠技术是必不可少的。

In spite of unknown complex dynamics of two-phase flows including gas-liquid interfaces, it is hard to study them with high spatial resolution by numerical computation due to quit less efficiency of parallel computing. By using a large number of GPUs equipped with high computational performance, we have developed a numerical simulator of gas-liquid two-phase flows with high resolution by introducing a new CLSVOF (Coupled Level Set with Volume of Fluid) method, a Pressure Poisson solver of Multi-grid preconditioned BiCGSTAB and IBM (Immersed Boundary Method). In order to get high parallel scalability, an overlapping technique between computation and communication is indispensable.