The influence of viscoelasticity on the collapse of cavitation bubbles near a rigid boundary
The influence of viscoelasticity on the collapse of cavitation bubbles near a rigid boundary
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DOI：
10.1007/s00162-011-0227-9
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发表时间：
2012
影响因子：
3.4
通讯作者：
S. Lind;T. Phillips
中科院分区：
文献类型：
--
作者：
S. Lind;T. Phillips
理解与空化相关的现象在科学和工程的许多领域都很重要。本文研究粘弹性对刚性边界附近空化泡动力学的影响。粘弹性效应使用麦克斯韦本构方程建模，并推导出广义伯努利方程。控制方程采用边界元法求解，其中气泡表面和电势均用三次样条表示。通过与文献中无粘情况下的结果进行比较，验证了数值格式的有效性。粘弹性的引入了一些有趣的气泡动力学，包括在崩溃过程中发生的振荡。最重要的是，它表明，粘弹性可以用来抑制液体射流的形成。与无粘性情况相比，随后的压力降低表明粘弹性对空化损伤有缓解作用。
An understanding of the phenomena associated with cavitation is important in many areas of science and engineering. This paper is concerned with the influence of viscoelasticity on the dynamics of cavitation bubbles near rigid boundaries. Viscoelastic effects are modelled using a Maxwell constitutive equation, and a generalized Bernoulli equation is derived. The governing equations are solved using the boundary element method in which both the bubble surface and the potential are represented by cubic splines. The numerical scheme is validated through comparisons with results in the literature for the inviscid case. The introduction of viscoelasticity introduces some interesting bubble dynamics including the occurrence of oscillations during collapse. Most importantly, it is shown that viscoelasticity can serve to suppress the formation of a liquid jet. The subsequent reduced pressures compared with the inviscid case suggest that viscoelasticity has a mitigating effect on cavitation damage.