The paper presents a description of a method for simulation of the motion of bodies in viscous incompressible fluid with the use of a technique of computation on overset grids (“chimera” technique). Equations describing the flow of viscous incompressible fluid are approximated by the finite volume method on an arbitrary unstructured grid. Their iterative solution is implemented using the algorithm SIMPLE. This paper describes the basic equations in the case of moving grid. The features of implementation of grid boundary conditions that are set in the course of construction of interpolation pattern are described. A method for overcoming numerical instability when a solid body model is used is demonstrated. The specificity of taking into account the forces of gravitation in the presence of multiphase media is described. The results of solving the problem of motion of cylinder in fluid, fall of sphere into fluid, and flooding of a ship's model are presented.

中文翻译：

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粘性不可压缩流体中人体运动的仿真

本文介绍了一种模拟粘性方法的方法，该方法使用过剩网格计算技术（“嵌合体”技术）来模拟粘性不可压缩流体中的物体运动。在任意非结构化网格上，通过有限体积法可以近似描述粘性不可压缩流体的流动方程。他们的迭代解决方案是使用SIMPLE算法实现的。本文描述了移动网格情况下的基本方程。描述了在插值模式构建过程中设置的网格边界条件的实现特征。说明了一种使用实体模型时克服数值不稳定性的方法。描述了在存在多相介质时考虑重力的特异性。