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假设双层流体的交界面不发生变形,热毛细力作用于此交界面,三维数值研究了大尺度环形液池中双层流体系统在内外壁面温差加热下的热毛细对流不稳定性,其中外壁面维持高温,内壁面维持低温。计算结果显示,上下层流体的流动特性受Marangoni效应和浮力效应的影响;热毛细对流的振荡产生于内壁面附近,并沿着温度梯度的方向传播;随着温差的增大,热毛细对流的振荡逐渐增强,温度振荡波数增大。
Assuming that the interface between the two fluids does not deform and the thermal capillary force acts on the interface, the thermal capillary convection instability of the two-fluid system in the large-scale annular liquid pool heated by the temperature difference between the inner and outer walls is investigated by three-dimensional numerical simulation. Maintain high temperature wall, the inner wall to maintain low temperature. The calculated results show that the flow characteristics of the upper and lower fluids are affected by the Marangoni effect and the buoyancy effect. The oscillation of the hot capillary convection occurs near the inner wall and propagates along the temperature gradient. As the temperature difference increases, the thermal capillary convection Oscillation gradually increased, the temperature oscillation wave number increases.