A Moving Embedded-Grid Method for Simulation of Unsteady Incompressible Flows with Boundaries Traveling Long Distances
A Moving Embedded-Grid Method for Simulation of Unsteady Incompressible Flows with Boundaries Traveling Long Distances
复制标题
模拟长距离边界非定常不可压缩流的移动嵌入式网格方法
DOI：
10.1299/kikaib.74.25
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
K. Matsuno
中科院分区：
文献类型：
--
作者：
S. Asao;K. Matsuno
本文提出了一种移动嵌入网格方法，用于模拟物体在整个流场中作任意移动时所驱动的流动。本文提出的“移动嵌入网格法”是在覆盖整个流场的主网格内，嵌入网格可以任意移动的方法。该方法基于移动网格体积法，采用动态增删网格点和移动网格线的算法。详细介绍了该方法的公式化。首先证明了本文方法满足几何守恒律。其次，本文方法被应用于定常流体中长距离圆柱绕流问题，并与其它参考解吻合良好。应用于两方柱绕流的数值计算，表明了该方法的有效性。
In this paper, a Moving Embedded-Grid Method is presented for simulation of flows driven by bodies arbitrarily moving in the whole of the flow field. The present “Moving Embedded-Grid Method” is the method such that the embedded grid can move arbitrarily in a main grid covering whole of the flow field. The present method is constructed based on the Moving-Grid Finite-Volume Method with algorithm of dynamically adding and eliminating grid points as well as shifting grid lines. Formulation of the method is presented in detail. First of all, it is confirmed that the present method satisfies the geometric conservation law. Next, the present method has been applied to the flow around a circular cylinder traveling long distance in a stationary fluid and shows good agreement with other reference solution. Applications to flows driven by two square cylinders passing and overtaking each other show the unsteady behavior of the phenomena and the promising feature of the method.