水平非平整基底上受热液膜流动特性

his paper was focused on the flow characteristics of heated liquid film along a horizontal microstructured wall. A long wave perturbation method was used to derive the evolution equation of liquid film thickness, and obtained the numerical solution of this evolution equation by the PDECOL code. Based on the numerical solution, the diagram of evolution progress for film surface wave on sinusoidal corrugated substrate was drew, and the influences of heated state and thermal conductivity of liquid film on the flow characteristics were analyzed. The results show that the greater the fluid heated, the more violent fluctuations in free interface, and the film was more instability, or even breaking. With the liquid-solid heat conduction coefficient ratio increasing, the film thickness first decreases and then increases, and reached minimum value when the heat conduction coefficient ratio is 1.