Three-dimensional oscillatory thermocapillary convection in liquid bridge under microgravity
Three-dimensional oscillatory thermocapillary convection in liquid bridge under microgravity
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DOI：
10.1016/s0017-9310(01)00012-6
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发表时间：
2001-10
影响因子：
5.2
通讯作者：
Z. Zeng;H. Mizuseki;Kiyoshi Simamura;T. Fukuda;K. Higashino;Y. Kawazoe
中科院分区：
文献类型：
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作者：
Z. Zeng;H. Mizuseki;Kiyoshi Simamura;T. Fukuda;K. Higashino;Y. Kawazoe
采用有限体积法对硅油液桥中的三维振荡热毛细对流进行了数值研究。结果表明，存在两种不同的振荡模式：脉动和旋转振荡。在振荡开始时，观察到脉动振荡对流。随着Marangoni数Ma的增大，脉动振荡对流逐渐被旋转振荡对流所取代，温度场和速度场呈现出旋转的特征。当As=4.0时，在周期振荡区，Ma与无量纲主频率f*= fH 2 <$− 1近似成线性关系。当As=1.0时，这种关系变得稍微复杂一些。
Three-dimensional oscillatory thermocapillary convection in silicone oil liquid bridge is studied numerically by means of finite volume method (FVM). The results reveal the existence of two different oscillatory modes: pulsating and rotating oscillations. Close to the onset of oscillation, the pulsating oscillatory convection is observed. With the increment of Marangoni number Ma, the pulsating oscillatory convection is replaced by rotating oscillatory convection, where the temperature and velocity fields demonstrate the characteristics of rotation. An approximately linear relationship between Ma and dimensionless main frequency f*=fH2ϰ−1is found for As=4.0 in periodic oscillatory regime. This relationship becomes a little more complex for As=1.0.