气固两相流全分辨率直接数值模拟的并行算法

摘要

用沉浸边界法对气固两相流进行全分辨率直接数值模拟，介绍并行算法及其并行效率。考察球形颗粒的空间分辨率等对计算精度的影响，对颗粒雷诺数Rep ＝1～150，颗粒直径与计算网格比大于20时，该并行算法获得的计算精度较高。%We employ the immersed boundary method to carry out the fully resolved direct numerical simulation of the gas-solid two-phase flows,and introduce the parallel algorithm and its parallel efficiency as well.We also investigate the influence of spatial resolution of spherical particle on the calculation precision.The parallel algorithm achieves higher calculation accuracy when the particle Reynolds number Rep=1 ~150,and the ratio of the particle diameter and computation grid is greater than 20.