中文摘要：

本文对移动粒子半隐式法（MPS），一种适用于计算粘性不可压缩流动的全拉格朗日无网格法进行了研究。在原有MPS方法的基础上建立了移动边界作用模型，实现了由于流体中运动部件的平动或转动而引起的流场变化，扩展了MPS方法的应用范围．将计算结果与精确解进行了比较，验证了带运动部件的MPS方法的正确性。同时对十字搅拌器进行了数值模拟，很好地描述了对液体的搅拌过程。为这一类流体机械问题的研究提供了新的数值研究方法。

英文摘要：

The moving particle semi-implicit （MPS） method is a fully Lagrangian meshless method developed for incompressible viscous flow. A particle interaction model of moving boundary was established for studying the flow with moving component. The simulation results of concentric shaft rotation were in good agreement with the analytic solution, and an example of cross agitator rotating in water was simulated, which well described the physic process. The new model expands the applications of MPS method and introduces a new way in studying on this kind of fluid machinery.