论文部分内容阅读
本文数值研究微重力条件下浅液池中大Pr数流体(Pr=105.6)热毛细对流的转捩过程.当液池两侧的温度差超过临界温度差时,在液池中会出现热毛细振荡对流.振荡对流的涨落值远小于时间平均值,涨落值表现为从冷端向热端传播的热流体波.起振时,涨落值的胞元分布在液层的中心区域;随着外加温度差的增加,涨落值的胞元逐渐充满液层.本文的结果显示了有限延伸矩形容器液层中热毛细对流及其起振过程与其它类型热毛细对流不同的特征.
In this paper, we study the thermo-capillary convection process of large Pr number fluid (Pr = 105.6) in shallow liquid pool under microgravity condition. When the temperature difference between both sides of liquid pool exceeds the critical temperature difference, hot capillary Oscillatory convection. Oscillatory convection fluctuations are far less than the time mean value, the fluctuations of the value from the cold side to the hot end of the spread of the hot fluid wave. At the start of oscillation, the fluctuations of the value of the cell distribution in the center of the liquid region; With the increase of the applied temperature difference, the cells of the fluctuation value gradually fill the liquid layer.The results of this paper show that the characteristics of the thermocapillary convection in the liquid layer of finite extension rectangle and its onset process are different from those of other types of thermocapillary convection.