Abstract
Liquid film thickness is a key parameter in evaporation and condensation heat transfer in micro tube slug flow. The present work addresses numerical simulation results on the liquid film thickness of gas-liquid slug flow in a micro tube. The Phase-Field method is employed to capture the interface, and the effects of capillary number and the grid size are investigated. The simulated liquid film thickness agrees well with experimental results at higher capillary numbers, but is found to be thicker than that of the experiments at lower capillary numbers. This is because the minimum liquid film thickness reproduced by the Phase-Field is limited by the diffused interface across several grids.
