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。
Interface of two-layer fluid system is assumed to be non-deformable,where the thermo-capillary forces acts on.The thermocapillary convection instability of two-layer system in a large annular pool is investigated numerically,in which the outer wall is a heated wall and the inner wall is a cold wall.The computational results show that the flow characteristics in upper layer depend on Marangoni effect and buoyancy effect.The oscillation of the thermocapillary convection initiates from the inner wall,and propagates along the direction of temperature gradient.With temperature difference increasing the number of the temperature wave increases.
参考文献
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