CFD based correlation for interphase mass transfer coefficient in Taylor bubble flow

In the present study volume of fluid based (VOF) interface tracking method has been used for the simulation of hydrodynamics of Taylor bubble flow in one unit cell. In this case the stationary bubble is supposed in an axis symmetric domain and the liquid flows over it. Afterwards, the effects of different parameters such as capillary number, gas volume fraction, unit cell length and capillary diameter on interphase mass transfer in Taylor flow have been investigated. Finally based on CFD simulation results a correlation has been proposed for interphase mass transfer coefficient. The ability for prediction of mass transfer coefficient in wide range of capillary number is the great advantage of the proposed correlation. In this correlation the change of bubble shape with capillary number has been regarded.