论文标题
泡沫中的泡沫升高：桥接粘性和惯性方案之间的差距
Bubble rise in a Hele-Shaw cell: bridging the gap between viscous and inertial regimes
论文作者
论文摘要
在雷诺数的范围内研究了两个垂直板之间限制的单个气泡的上升。特别是，我们关注从粘性到惯性状态的过渡期间气泡速度，纵横比和阻力系数的演变。对于足够大的气泡，基于功率平衡的简单模型捕获了气泡速度的过渡，尽管在大雷诺数下气泡纵横比的时间变化很强，但仍匹配了所有实验数据。令人惊讶的是，粘性状态中的气泡系统地表现出沿其运动方向拉长的椭圆形，而惯性主导的机制中的气泡始终垂直于其扁平。
The rise of a single bubble confined between two vertical plates is investigated over a wide range of Reynolds numbers. In particular, we focus on the evolution of the bubble speed, aspect ratio and drag coefficient during the transition from the viscous to the inertial regime. For sufficiently large bubbles, a simple model based on power balance captures the transition for the bubble velocity and matches all the experimental data despite strong time variations of bubble aspect ratio at large Reynolds numbers. Surprisingly, bubbles in the viscous regime systematically exhibit an ellipse elongated along its direction of motion while bubbles in the inertia-dominated regime are always flattened perpendicularly to it.
