Property analysis into the formation of liquid falling thin film on a single channel of a vertical twisted and fluted tube

In this paper, the influence of helix angle and other parameters to the formation behaviours of liquid falling film on the surface of a helix channel in the case of a vertical fluted tube are investigated. A single-component liquid is considered and the theoretical model is set up to simulate the behaviours of the falling film on the surface of fluted helix tube. The effect of the inclined angle, the Weber number and the channel geometry of the tube axis to the gravity on the formation of the liquid falling film are analysed. By study the film profile, a conclusion is drawn the surface tension drives the fluid into the grooves, thus the film is thinned on the crests of the fluids.