Author(s)

R.J. Held & M.A. Celia

Abstract

A pore-scale model is developed to simulate mass transfer between two fluid phases in a porous medium. The model uses a network description of the pore space, and couples to a capillary displacement model, which explicitly tracks each fluid-fluid interface in the porous medium. Given explicit lo- cations of all fluid-fluid interfaces, the mass-transfer model computes mass fluxes across each interface, then solves transport equations in the pore network to determine aqueous-phase concentrations. A stagnant-layer dif- fusion model is used for mass transfer, so calculated concentrations control the subsequent rates of mass transfer. The model is used to predict a disso- lution front develope

Keywords