下降液膜二维剪切表面波的演化方程

Evolution equation of two-dimensional shear interfacial waves of falling liquid films

基于边界层理论,采用积分方法,建立了沿倾斜壁面下降、表面有气流作用的液膜二维表面波扰动演化方程。模型中包含了界面切应力、雷诺数、表面张力、倾角、流体物性的影响,为进一步分析上述因素对液膜流动稳定性的影响,提供了一种合理的数学模型。

The evolution equation of the two-dimcnsional waves on the liquid films draining down an inclined wall under the effect of gas flow is established with the integral approach based on the boundary layer theory. The present model includes the effects of shear stress, Reynolds number, surface tension, inclination angle, and liquid property, Using this model, it is convenient to theoretically investigate their effects of the above factors to stability of liquid film under the interracial shear stress.