傾斜板の下面に沿う液膜の流下特性

概要

論文の詳細を見る
Liquid films are encountered in many industrial applications such as chemical process equipment and exchangers. Most of the previous experimental studies on the hydrodynamics of liquid films have been performed with liquid film flow on a vertical surface or an inclined upward-facing surface. This study concerns flow behavior of thin water with or without surfactant films on an inclined downward-facing plate. Here, the dependence of behavior such as flow (10<Re<500) on experimental parameters (surface roughness, inclination angle of surface, surface tension of liquid, initial film thickness) was investigated through flow visualization by a tracer injection method. Several wave patterns which appeared at the free surface of flowing film were observed under certain flow conditions. Adding surfactant has the effect of damping of waves. As a result of demensional analysis for l_F, the flow-distance until flowing film detouches a smooth plate, l_F is in proportion to the product of Re^<1/2> and Fr^<1/3>. Under the experimental conditions here, surface roughness has more effect on the film flow behavior than surface tension.
社団法人日本機械学会の論文
1993-03-25