大移動する複数物体によって誘起される非圧縮流れに対する三次元移動埋め込み格子法(流体工学,流体機械)

概要

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The purpose of this paper is to construct and develop the Moving Embedded-Grid method for simulation of three-dimensional incompressible flows including obstacles traveling long distance. The feature of the presented method is that the Embedded-Grid can move without restriction in all directions in a stationary main grid covering the whole of the flow field. The method is constructed based on the four-dimensional control volume in space-time unified domain such that the method assures to be divergence-free in the space-time unified domain and thus satisfies both the physical and geometrical conservation laws simultaneously. First of all, it is confirmed that the present method satisfies the geometric conservation law. Next, the method has been applied to the flow around a sphere traveling long distance in a stationary fluid and the result shows good agreement with other reference solution. The method has been applied to the flow in a mixer in order to investigate the effective scheme of stirring two fluids by rods and the unsteady behavior of the flow is shown. The results show the promising feature of the method.
一般社団法人日本機械学会の論文
2009-07-25