Mass Transfer Across The Turbulent Gas-Liquid Interface

Abstract

It is found that the gradient of the vertical fluctuating velocity at the interface (beta) is crucial for the scalar transfer across the gas-liquid interface. In this work, an improved measurement method was developed to quantify beta. A series of experiments with more varied flow conditions were carried out. Based on these experimental works, a more general correlation was presented. The second major aspect of this work is on the falling film configuration. A series of experiments in an inclined thin falling film apparatus were carried out to determine the beta distribution and the associated mass transfer velocity. Separately, numerical simulation was also carried out for a vertical arrangement. Overall, the agreement with the general correlation based on beta obtained previously indicates that there may exist an universal correlation for the scalar transport across the turbulent gas-liquid interface independent of the turbulence generation methods.