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

尽管含气液界面的两相流具有未知的复杂动力学特性，但由于并行计算效率较低，很难用数值计算方法对其进行高空间分辨率的研究。利用大量高计算性能的GPU，通过引入新的CLSVOF（Coupled Level Set with Volume of Fluid）方法、BiCGSTAB多重网格预处理压力泊松求解器和IBM（Immersed Boundary Method），开发了一个高分辨率的气液两相流数值模拟器。为了获得高的并行可扩展性，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.