[2E05-08] Numerical Simulation

[2E07] Validation of Correlation for Wall Friction Factor for Falling Liquid Film in Vertical Pipes

*Toshiya Takaki¹, Michio Murase¹ (1. INSS)

Keywords:Vertical pipe, Countercurrent flow, Liquid film thickness, Wall friction factor, Free falling film

A correlation for the wall friction factor f_w for the falling liquid film under flooding at the top end in a vertical pipe was proposed in our previous study, but validation data for f_w under flooding conditions are few. In this study, therefore, a correlation for the thickness δ of the free falling film was obtained by using the f_w correlation, and the validity of the f_w correlation was confirmed by comparing the obtained δ correlation with the existing δ data.