Modeling bubble collapse anisotropy in complex geometries
Modeling bubble collapse anisotropy in complex geometries
复制标题
模拟复杂几何形状中的气泡破裂各向异性
DOI：
10.1103/physrevfluids.7.123601
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发表时间：
2022
影响因子：
2.7
通讯作者：
Andrews E
中科院分区：
文献类型：
--
作者：
Andrews E
在刚性边界附近破裂的气体或蒸汽泡向边界移动，并产生指向边界的高速射流。这种行为已被证明是塌陷“各向异性”的函数，通过称为各向异性参数的开尔文脉冲的无因次表示来测量[Supponen，J. Fluid Mech. 802，263（2016）0022-112010.1017/jfm.2016.463]。然而，表征的各向异性参数在不同的几何形状已被限制到简化的解析解。在这项工作中，我们开发了一个廉价的数值模型，边界元法的基础上，能够预测任何刚性复杂的几何形状的各向异性参数。我们的实验探索一个强大的测量气泡位移，表明在一系列复杂的几何形状的气泡位移的行为作为一个单一的功能的预测各向异性参数值。
A gas or vapor bubble collapsing in the vicinity of a rigid boundary displaces toward the boundary and produces a high-speed jet directed at the boundary. This behavior has been shown to be a function of the “anisotropy” of the collapse, measured by a dimensionless representation of the Kelvin impulse known as the anisotropy parameter [Supponen , J. Fluid Mech. 802, 263 (2016)0022-112010.1017/jfm.2016.463]. However, characterization of the anisotropy parameter in different geometries has been limited to simplified analytic solutions. In this work we develop an inexpensive numerical model, based on the boundary element method, capable of predicting the anisotropy parameter for any rigid complex geometry. We experimentally explore a robust measure of bubble displacement, showing that the bubble displacement in a range of complex geometries behaves as a single function of the predicted anisotropy parameter values.