论文标题
建模复杂几何形状中的气泡塌陷各向异性
Modelling bubble collapse anisotropy in complex geometries
论文作者
论文摘要
在刚性边界附近偏离边界附近的气泡或蒸气气泡，并产生了针对边界的高速射流。该行为已被证明是塌陷的“各向异性”的函数，它通过开尔文脉冲的无量纲表示，称为各向异性参数[Supponen等，J。Fluid Mech。 802，263-293（2016）]。但是，不同几何形状中各向异性参数的表征限于简化的分析溶液。在这项工作中，我们基于边界元素方法开发了一个廉价的数值模型，该模型能够预测任何刚性复合物几何形状的各向异性参数。我们通过实验探索了气泡位移的强大度量，表明在一系列复杂几何形状中的气泡位移是预测的各向异性参数值的单个函数。
A gas or vapor bubble collapsing in the vicinity of a rigid boundary displaces towards 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 et al., J. Fluid Mech. 802, 263-293 (2016)]. However, characterisation 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.
