急傾斜 開水路上을 물이 流動할 때 粘性力과 重力의 效果 = Effect of Viscosity and Gravity Force in Case of Film Water Flow on Steep Open Channel

다국어 초록 (Multilingual Abstract)

Experiment results showed that film water flow(arount 0. 5mm of film thickness) on steep open channel (made of a normal glass with 160cm of the length) was affected by mainly gravity force rather than viscosity force.
Characteristics of the gravity force affecting to the film water flow depended upon the flow rate of water, namely strong gravity force affected to the flow for a big flow rate than for a little flow rate.
Very large deviation of the effect between a big and a little flow rate took place at entrance of the channel. Specialy, for the maximum flow rate(10 GPM) the most effect at the entrance decreased rapidly at early stage. Contrarily, for the minimum flow rate (0.25GPM) the effect at the entrance rather increased a little at early stage comparatively.
Generally, the effects of gravity force kept almost constantly for all flow rate from mid point of the channel (about 80cm from the entrance of channel).