Thermocapillary convection in two immiscible liquid layers with free surface
Thermocapillary convection in two immiscible liquid layers with free surface
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DOI：
10.1063/1.858817
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发表时间：
1993-08
影响因子：
4.6
通讯作者：
T. Doi;J. Koster
中科院分区：
文献类型：
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作者：
T. Doi;J. Koster
研究了两个具有一个自由面、一个液/液界面、平行于界面施加微分加热的非混相液体层中的热毛细对流。给出了无限水平层的解析解。流型的定义参数为λ，即界面张力温度系数与表面张力温度系数之比。在零重力条件下存在四种不同的流动模式。发现了使下包封液层流体运动停止的“停止”条件。通过数值实验研究了垂直端壁对二维空腔双层对流的影响。在小雷诺数的极限下，由解析研究得到的停止条件是有效的。所述被封装的液体层中的流动可以被实质上抑制。
Thermocapillary convection is studied in two immiscible liquid layers with one free surface, one liquid/liquid interface, and differential heating applied parallel to the interfaces. An analytical solution is introduced for infinite horizontal layers. The defining parameter for the flow pattern is λ, the ratio of the temperature coefficient of the interfacial tension to that of the surface tension. Four different flow patterns exist under zero gravity conditions. ‘‘Halt’’ conditions which halt the fluid motion in the lower encapsulated liquid layer have been found. A numerical experiment is carried out to study effects of vertical end walls on the double layer convection in a two‐dimensional cavity. The halt condition obtained from the analytical study is found to be valid in the limit of small Reynolds numbers. The flow in the encapsulated liquid layer can be suppressed substantially.