有限深度液体中气泡破碎的参数影响

Parametric Study on Bubble Collapse in the Finite Depth Liquid

在改进气泡破碎数理模型的基础上,研究了流体粘性力、气泡壁初始速度、有限液面高度、液面压力、液体密度等因素对气泡破碎的影响规律。数值计算结果表明,气泡临界破碎条件与这些因素密切相关。随着液体深度的增大,气泡更容易破碎,当液体深度大于气泡半径的100倍时,液体深度对气泡破碎临界条件几乎无影响,此时可以近似认为气泡位于无穷深液体中;当气泡壁初始速度为0m/s时,气泡不容易破碎;气泡具有初始收缩的速度时,气泡最容易破碎;随着气泡壁初始速度的绝对值、液体表面压强和液体密度的增大,气泡也更容易破碎。

Based on an improved mathematical physical model of bubble collapse in the finite depth of liquid caused by an initial bubble wall motion,the effect of fluid viscosity,initial bubble wall motion,height height of liquid affects hardly the criteria of bubble collapse if it is 100 times more than the initial radius of the bubble,which can be considered as the bubble staying in the infinite depth of liquid.It is difficult for the bubble to collapse if the initial bubble wall velocity is of 0m/s.On the contrary,it is easy for the bubble to vance.