液封厚度对双向温差下环形双液层内热毛细对流的影响
发布时间：2019-06-11 21:55
【摘要】：液封厚度对液封系统内的热毛细对流有着重要的影响,但已有的大多数研究集中于单向温差下流体在液封系统中的流动.文中采用数值模拟方法研究了液封厚度对双向温差下环形双液层内热毛细对流的影响.模拟过程中,液池底部施加线性温度梯度,自由表面考虑对流换热,厚度比H_r取0.1~0.9,热毛细雷诺数Re取0~1.5×10~6,液池深宽比Γ取0.1、0.2、0.3.结果表明:Re较小时流动为稳态,热毛细对流强度随H_r增大而减弱;当Re不断增大至超过一定值时,流体的流动转变为振荡的多胞流动,流体振荡振幅和流动强度随H_r增大而减小;流动转变的临界值不随H_r单调变化,H_r=0.5~0.7可以使得不同Γ下的临界Re最大,此时流动稳定性最好.
[Abstract]:The thickness of liquid seal has an important influence on the thermal capillary convection in liquid seal system, but most of the existing studies focus on the flow of fluid in liquid seal system under unidirectional temperature difference. In this paper, the effect of liquid seal thickness on thermal capillary convection in annular double liquid layer under bidirectional temperature difference is studied by numerical simulation method. In the simulation process, the linear temperature gradient is applied at the bottom of the liquid pool, the convective heat transfer is considered on the free surface, the thickness ratio H 鈮，
本文编号：2497480
[Abstract]:The thickness of liquid seal has an important influence on the thermal capillary convection in liquid seal system, but most of the existing studies focus on the flow of fluid in liquid seal system under unidirectional temperature difference. In this paper, the effect of liquid seal thickness on thermal capillary convection in annular double liquid layer under bidirectional temperature difference is studied by numerical simulation method. In the simulation process, the linear temperature gradient is applied at the bottom of the liquid pool, the convective heat transfer is considered on the free surface, the thickness ratio H 鈮，
本文编号：2497480
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