关键词: 流体力学, Boltzmann模型方程, 离散速度坐标法, 速度分布函数, 有限差分法, HPF并行计算

Abstract: With the development of modern aerospace technique, the algorithm for flows past three-dimensional body from various flow regimes has been being considered in the field of engineering application and academic study, as will be the end-goal of the research of this paper. The unified algorithm for the gas flows from rarefied transition to continuum regime can be developed by numerically solving the Boltzmann simplified velocity distribution function equation. The parallel strategy for the gas-kinetic unified algorithm for 3-D flows is studied and presented by using the domain decomposition techniques. The gas flows from various flow regimes around three-dimensional sphere and spacecraft are computed and verified by the HPF parallel computation in high performance computer with massive scale parallel, where the computed results are found in high resolution of the flow fields and good agreement with the theoretical, DSMC and experimental results. The preferable parallel efficiency and speed-up ratio are found. It is practical and hopeful that the new HPF parallel computation in solving three-dimensional complex problems from various flow regimes will be processed.

Key words: fluid mechanics, Boltzmann model equation, discrete velocity ordinate method, velocity distribution function, finite difference method, HPF parallel computing