Numerical Studies Of The Liquid Film Formation On The Surface Of A Horizontal Twisted And Fluted Tube

The purpose of this study is to investigate the formation of liquid falling film and its flow behavior on the surface of a horizontal twisted and fluted tube used in the case of wet flue gas desulfurization, desalination, and so on. The researches can offer academic foundation for the applying of high efficiency heat exchanger that make the utilizing efficiency of the energy improved in the industrial production.A numerical model based on the surface geometry of the horizontal twisted and fluted tube was established. The distribution of the liquid film was got, and the effects of helix angle, geometry of the channel, liquid mixing and liquid properties on the liquid film was also studied. The results indicate that the film thickness on the surface of the horizontal twisted and fluted tube becomes more uniform than the classical smooth tube. As the increasing of helix angle, the film thickness becomes more uniform. And in flat channel, the channel is deeper, i.e., the span of the channel is smaller, the film is more uniform, the distribution of the film is better. For the liquid in the multi-head twisted and fluted tube can cross the boundary of the channel and merge into the fluid flow in the next channel, the film distribution of multi-head twisted and fluted tube is overmatch single-head twisted and fluted tube.