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采用二维轴对称模型数值研究了液桥耦合热-溶质毛细对流流动特性,自由表面变形使用Level set方法进行捕获,分析了热Marangoni数与溶质Marangoni数比值(R_σ)对流场及自由表面变形的影响。结果显示,当R_σ<-1,流场由一个顺时针对流组成,自由表面在底部凸起,而在上部凹陷,且随着R_σ减小自由表面变形幅度增大。当R_σ=-1时,流场由两个反向旋转的对流涡组成,自由表面的变形幅度较小。当R_σ>-1时,流场由一个逆时针旋转的对流涡组成,自由表面在上部凸起而在下部凹陷,随着R_σ增大自由表面变形幅度增大。
The two-dimensional axisymmetric model was used to study the liquid-bridge coupled thermo-solute capillary convection flow. The free surface deformation was captured using the Level set method. The convection field and free surface deformation of the thermal Marangoni number and the solute Marangoni number ratio (R_σ) Impact. The results show that when R_σ <-1, the flow field is composed of a clockwise convection, the free surface is convex at the bottom and the top is depressed, and the free surface deformation amplitude increases with decreasing R_σ. When R_σ = -1, the flow field consists of two counter-rotating counter-flow vortices, and the deformation of the free surface is small. When R_σ> -1, the flow field consists of a counter-rotating counter-current vortex. The free surface is convex at the upper part and depressed at the lower part. As the R_σ increases, the free surface deformation amplitude increases.