Vortex rings of one fluid in another in free fall
Vortex rings of one fluid in another in free fall
复制标题
自由落体时一种流体在另一种流体中的涡环
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
Y. Renardy
中科院分区：
文献类型：
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作者：
Nicholas R. Baumann;D. Joseph;P. Mohr;Y. Renardy
实验中，一个不混溶的液体的涡环中创建的另一个从下降的重力下从休息。这些环与粘性产生的循环有关，与在高雷诺数下发生在可混溶液体中的经典涡环不同，它们甚至可以在非常低的雷诺数下存在。由于环不扩散，它们是明确的。尽管如此，有许多相似之处的动力学的形成和流动的混溶和不混溶环。参数确定，似乎与作者的意见和照片的一些更有趣的事件显示。
Experiments in which vortex rings of one immiscible liquid are created in another from drops falling from rest under gravity are presented and interpreted. These rings are associated with circulations generated by viscosity and, unlike classical vortex rings which occur in miscible liquids at high Reynolds numbers, they can exist even at very low Reynolds numbers. Since the rings do not diffuse, they are well‐defined. Nonetheless, there are many similarities in the dynamics of formation and flow of miscible and immiscible rings. Parameters are identified which appear to correlate the authors’ observations and photographs of some of the more interesting events are shown.