二维轴对称坐标下基于介质形心和体积的界面重构方法

Interface reconstruction based on volume and centroid-of-volume in two dimensional axisymmetry geometry

物质界面的追踪和处理是多介质流场计算的关键内容,本文将基于介质重心和体积的二维平面MOF方法推广到实际问题计算中应用更为广泛的二维轴对称坐标,包括任意多边形旋转后形心的定义及其计算公式,以及界面重构方法的具体实现方式,然后通过界面重构算例及涉及材料断裂、破碎的碎片云问题的计算,说明所述方法具有较强的模拟实际问题的能力.

The tracking and calculation of material＇s interface is one of the crucial contents to simulating multi-material flow. This paper extends the 2D plane MOF method to 2D axisymmetric geometry, which is applied more extensively in practical calculations, including its definition and computation of centroid-of-volume after arbitrary polygon rotates, and implement detail of interface reconstruction. At the end, the paper shows the example of interface reconstruction, and simulated experimental debris clouds phenomenon which involves fracture and spall of material, the comparison results of experimental and computational images show that the method described has the strong ability to simulate practical problems.