Periodic and aperiodic bubbling in submerged gas-liquid jets through a micro-channel
Periodic and aperiodic bubbling in submerged gas-liquid jets through a micro-channel
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DOI：
10.1063/1.4979483
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发表时间：
2017-04
影响因子：
4.6
通讯作者：
Ying Shen;Liang Hu;Wen-yu Chen;Xin Fu
中科院分区：
文献类型：
--
作者：
Ying Shen;Liang Hu;Wen-yu Chen;Xin Fu
仅仅在单相气体射流中研究的周期性和非周期性起泡的常见现象被发现存在于通过微通道的浸没气液射流中。由于液体输入流的参与与气相相互作用，周期性和非周期性的鼓泡行为以及状态转变机制与单相气体射流有很大不同。周期性的鼓泡是通过将规则的泰勒流注入大量液体中而形成的，其中揭示了一种称为“气泡分叉”的特殊气泡运动。气泡移动到与其接触的气泡相反的方向，因为不相等的接触角使气泡在分离时倾斜。分叉过程通过接触线、气泡中心和分叉点的演变来描述。第二次分叉事件导致气泡分支同时旋转。气液射流和单相气体射流之间的周期性差异可以用维度来解释...
The common phenomena of periodic and aperiodic bubbling, which were studied merely in single-phase gas jets, are discovered to exist in submerged gas-liquid jets through a micro-channel. Due to the participation of the liquid input flow which interacts with the gas phase, the periodic and aperiodic bubbling behaviors, as well as the regime transition mechanisms, are quite different from single-phase gas jets. Periodic bubbling is formed by injecting a regular Taylor flow into bulk liquid, in which a special motion of bubbles named “bubble bifurcation” is revealed. Bubbles move into the opposite orientation to the bubbles they touch because unequal contact angles make the bubbles tilt when they detach. The bifurcation process is described by the evolutions of the contact line, bubble centers, and the bifurcation point. The second bifurcation events cause the bubble branches to rotate simultaneously. The difference of periodicity between gas-liquid jets and single-phase gas jets is explained in a dimensionl...