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Pore-scale Modeling of Mass Transfer from Nonaqueous Phase Liquids

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... Pages: 8 Size: 640 kb Paper DOI: 10.2495/CMWR980551

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Download the Full Article This article is part of the WIT OpenView scheme and you can download the full text Adobe PDF article for FREE by clicking the 'Openview' icon to the right.