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针对倾斜随机粗糙壁面上含不溶性活性剂溶液的流动过程,采用润滑理论建立了液膜厚度和浓度的时空演化模型,通过PDECOL程序数值求解得到了液膜流/液滴铺展的动力学特性及壁面结构参数的影响.研究表明:在重力分量和Marangoni效应共同作用下,液膜流/液滴铺展速度加快,液膜边缘和液滴中心出现毛细隆起,液膜/液滴底部出现凹陷,同时受粗糙壁面影响,液膜表面变形更显著.增加壁面倾角θ具有使重力分量和Marangoni效应增强,导致隆起和凹陷程度均有所增加的作用.增大壁面高度D可使液膜流/液滴铺展速度加快,表面变形放大.而壁面波数k0则使液膜流/液滴铺展过程减缓,抑制隆起和凹陷产生.与液膜流相比,D和k0对液滴铺展速度的影响相对较小.
Aiming at the flow process of solution containing insoluble active agent on the inclined random rough wall, the space-time evolution model of the thickness and concentration of the liquid film was established by using the lubrication theory. The dynamic characteristics of liquid film / The results show that under the combined action of gravitational component and Marangoni effect, the liquid film flow / droplet spreading speed is accelerated, the edge of the liquid film and the center of the droplet appear capillary uplift, and the bottom of the liquid film / Rough wall effect, liquid film surface deformation is more significant.Improvement of the wall angle θ has the gravity component and the Marangoni effect increased, leading to the degree of uplift and depression have increased the role of increasing the wall height D allows liquid film flow / drop spread The speed of wave is accelerated and the deformation of the surface is enlarged.When the wall wave number k0 slows down the film flow / droplet spreading process, it inhibits the buildup and depression.Compared with the liquid film flow, D and k0 have relatively little influence on the droplet spreading speed.