Pore-scale modeling of mass transfer from nonaqueous phase liquids

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

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 locations 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 diffusion model is used for mass transfer, so calculated concentrations control the subsequent rates of mass transfer. The model is used to predict a dissolution front developed by flushing water through a column that is initially at residual NAPL saturation. Model results compare well to measured experimental results.

Original languageEnglish (US)
Title of host publicationComputational Methods in Contamination and Remediation of Water Resources
EditorsV.N. Burganos, G.P. Karatzas, A.C. Payatakes, C.A. Brebbia, W.G. Gray, G.F. Pinder
PublisherComputational Mechanics Publ
Pages445-452
Number of pages8
Volume1
StatePublished - Jan 1 1998
EventProceedings of the 1998 12th International Conference on Computational Methods in Water Resources, CMWR XII'98. Part 1 (of 2) - Crete, Greece
Duration: Jun 1 1998Jun 1 1998

Other

OtherProceedings of the 1998 12th International Conference on Computational Methods in Water Resources, CMWR XII'98. Part 1 (of 2)
CityCrete, Greece
Period6/1/986/1/98

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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