Researches on hydrodynamics of liquid film flow on inclined plate using diffuse-interface method

Abstract

The liquid film flow can consistently remove heat to reduce the pressure and temperature in the containment when a severe accident occurs in reactors. However, due to the various variable factors of the environment, such as angle of wall inclination and physical properties of liquids, the liquid film flow is complex in practice. In order to investigate the influences of inclined angle of plate, contact angle, surface tension and density on the hydrodynamics of liquid film, numerical simulation of liquid film flow on the inclined plate are studied by using the diffuse-interface method. Good agreements of the maximum liquid film thickness and the wave velocity are observed between experiment and simulation, proving that diffuse-interface method can be available to simulate the hydraulic characteristics of the liquid film flow. And the analysis of the influence of the above factors on liquid film flows show that the solitary wave phenomenon can be observed in the simulation; the wettability of liquid film flow becomes worse when the inclined angle and the contact angle increase; the change of contact angle is related to the surface tension; the wettability of the liquid film can be improved by increasing density of the liquid for the condition that the wettability is not good.