泥浆与液面、阻挡墙撞击的二维数值模拟

在交错网格中，用MAC方法求解非牛顿流体的二维不可压N－S方程，论文分别对圆柱形泥浆撞击液面，泥浆溃坝波撞击阻挡墙问题进行了数值模拟，并与水的相应结果作了对照，结果表明：当与液面撞击时，水和泥浆自由面随时间的演化图象与物理上的定性分析结果是一致的，由于本构关系不同，两者的侵彻自由面和液面运动均存在较大差异，当水和泥浆与阻挡墙撞击时，水的自由面变化要比泥浆复杂得多，在相同的时间内，左，右挡墙所受的冲击力和冲击次数也不相同。

Numerical Investigation on Two-dimensional Cylindrical Mud Impacting Walls and Mud Surfaces

Two dimensional incompressible N S equations for non Newtonian fluid was solved by using MAC method in staggered grids. For mud, a numerical simulation was carried out of the impact of its cylinder on mud surface, and impact to walls from a broken dam. The results of water were also presented for comparison. The distortion of free surfaces is well simulated for mud and water. The evolution of free surfaces is in qualitative agreement with physical analysis. Because of the difference in constitutive relationship for water and mud, the evolutions of intruded surfaces are quite different when the cylinders impact the fluid surfaces. The free surface is more complicated for water, and impact load is also different for water and mud impacting the walls.