NUMERICAL SIMULATION FOR A FLOW AROUND BODY EJECTION USING AN AXISYMMETRIC UNSTRUCTURED MOVING GRID METHOD
NUMERICAL SIMULATION FOR A FLOW AROUND BODY EJECTION USING AN AXISYMMETRIC UNSTRUCTURED MOVING GRID METHOD
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DOI：
10.1615/computthermalscien.2012004715
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发表时间：
2012-01-01
影响因子：
1.5
通讯作者：
Asao, Shinichi
中科院分区：
文献类型：
--
作者：
Yamakawa, Masashi;Takekawa, Daiki;Asao, Shinichi
发展了一种轴对称网格系统的非结构移动网格有限体积法。本文将该方法应用于物体弹射问题。当物体通过圆柱体弹射时，物体会出现复杂的运动和复杂的流动现象。这表明阀体与气缸分离。因此，在贴体坐标系的情况下，应根据物体的运动来创建和消除计算单元。此外，通过弹出主体，在瞬间将圆筒内部和圆筒外部之间的两个分离的物理空间结合在一起。然后，为了捕捉该点处流动的突然变化，需要在它周围生成一个有效的网格。本文构造了一个完全满足几何守恒律的新方法。
An unstructured moving-grid finite volume method is developed for an axisymmetric grid system. In this paper, the method is applied to a body ejection problem. When a body is ejected through a cylinder, complicated motion of the body and complicated flow phenomena occur. It shows that the body is separated from the cylinder. Thus, in the case of a body fitted coordinate system, computational elements should be created and eliminated according to the motion of the body. Furthermore by ejection of the body, two separated physical spaces between the inside of the cylinder and the outside of the cylinder are combined in an instant. Then, to capture a sudden change of flow at the point, it is necessary to generate a valid mesh around it. In this paper, a new method is constructed satisfying the geometric conservation law perfectly.