Direct simulation of droplet flow with mass transfer at interface

A direct simulation code has been developed to solve two-phase flow with mass transfer at the interface. The position of the interface is determined by solving a transport equation of the maker density function, one of front-capturing methods. The present method performs the dissolution of mass of a dispersed phase into a continuous phase as a notable feature. Moreover, transfer of the dissolved mass is solved in the continuous phase. At the interface, mass diffusion flux is calculated both for the boundary condition of mass transfer and for the shrinkage of a droplet. For the validation of the present method, three case studies are successfully demonstrated: rise of single droplet, dissolution from a rigid sphere, and dissolution from a rising droplet. [S0098-2202(00)01303-1].