192 / 2019-08-19 09:34:52

Numerical Analysis of the Effect of Wall Structure on Bubble-Group

计算流体力学、多场耦合、生物力学、动力学等 > 计算流体力学

Using the volume of fluid (VOF) method in a dam-break problem, we studied the influence of wall structures on compressible bubble group by measuring the spatial average pressure on the wall. We set up an obstacle at the bottom of the tank, which helps create air bubbles when the collapsing water impacts it and set up three kinds of structures on the left wall, namely, a cuboidal structure, a ellipsoidal structure and a conical structure. It is found that when water hits the left wall, the topology of the bubble wrapped in the water will be changed by the wall structure, which leads to the change of pressure on the wall. We also found that the cuboidal structure has the maximum effect in reducing the average pressure amplitude on the wall among those three kinds of wall structures. Especially, by adjusting the position and length of a cuboidal structure appropriately, the feature of oscillation of pressure can be made to disappear.