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The nature of bubble entrapment in a Lamb–Oseen vortex
Physics of Fluids ( IF 4.6 ) Pub Date : 2021-06-15 , DOI: 10.1063/5.0053658
Ryan Kelly 1 , David B. Goldstein 1 , Saikishan Suryanarayanan 1 , Marcos Botto Tornielli 1 , Robert A. Handler 2
Affiliation  

Bubble trajectories in the presence of a decaying Lamb–Oseen vortex are calculated using a modified Maxey–Riley equation. Some bubbles are shown to get trapped within the vortex in quasi-equilibrium states. All the trapped bubbles exit the vortex at a time that is only a function of the Galilei number and the vortex Reynolds number. The set of initial bubble locations that lead to entrapment is numerically determined to show the capturing potential of a single vortex. The results provide insight into the likelihood of bubble entrapment within vortical structures in turbulent flows.

中文翻译:

Lamb-Oseen 涡流中气泡截留的性质

使用修正的 Maxey-Riley 方程计算存在衰减 Lamb-Oseen 涡流时的气泡轨迹。一些气泡显示出在准平衡状态下被困在涡流中。所有被困气泡在一个时间离开涡流,该时间仅是伽利略数和涡流雷诺数的函数。导致截留的一组初始气泡位置在数值上确定以显示单个涡流的捕获潜力。结果提供了对湍流中涡流结构内气泡截留可能性的深入了解。
更新日期:2021-06-30
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