Numerical modelling of the rise of Taylor bubbles through a change in pipe diameter
Numerical modelling of the rise of Taylor bubbles through a change in pipe diameter
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DOI：
10.1016/j.compfluid.2017.01.023
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发表时间：
2017-04-22
影响因子：
2.8
通讯作者：
Azzopardi, Barry
中科院分区：
文献类型：
--
作者：
Ambrose, Stephen;Lowndes, Ian S.;Azzopardi, Barry
泰勒气泡的上升，通过膨胀在垂直管道模拟使用计算流体动力学。从模型的预测与现有的实验工作进行比较，并显示出良好的一致性，定量和定性。许多研究者，包括本论文的研究者，发现当气泡通过膨胀时，它要么保持完整，要么分裂成一个或多个子气泡。我们发现，气泡的临界长度，定义为最大长度，将通过完整的，是成正比的余割的角度的膨胀。此外，我们表明，对于突然膨胀，临界气泡长度变得不受影响的壁的上部管道的直径增加。(C)2017作者爱思唯尔有限公司出版
The rise of Taylor bubbles through expansions in vertical pipes is modelled using Computational Fluid Dynamics. The predictions from the models are compared against existing experimental work and show good agreement, both quantitatively and qualitatively. Many workers, including the present work, find that, as the bubble passes through the expansion, it will either remain intact or split into one or more daughter bubbles. We find that the critical length of bubble, defined as the maximum length that will pass through intact, is proportional to the cosecant of the angle of the expansion. Further, we show that for an abrupt expansion, the critical bubble length became unaffected by the walls of the upper pipe as the diameter was increased. (C) 2017 The Authors. Published by Elsevier Ltd.