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Titolo:
Grid refinement for modeling multiphase flow in discretely fractured porous media
Autore:
Slough, KJ; Sudicky, EA; Forsyth, PA;
Indirizzi:
Univ Waterloo, Dept Earth Sci, Waterloo, ON N2L 3G1, Canada Univ WaterlooWaterloo ON Canada N2L 3G1 ci, Waterloo, ON N2L 3G1, Canada Univ Waterloo, Dept Comp Sci, Waterloo, ON N2L 3G1, Canada Univ Waterloo Waterloo ON Canada N2L 3G1 ci, Waterloo, ON N2L 3G1, Canada
Titolo Testata:
ADVANCES IN WATER RESOURCES
fascicolo: 3, volume: 23, anno: 1999,
pagine: 261 - 269
SICI:
0309-1708(19991101)23:3<261:GRFMMF>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Keywords:
modeling; multiphase flow; fractured porous media; grid refinement;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Slough, KJ Univ Waterloo, Dept Earth Sci, Waterloo, ON N2L 3G1, Canada Univ Waterloo Waterloo ON Canada N2L 3G1 o, ON N2L 3G1, Canada
Citazione:
K.J. Slough et al., "Grid refinement for modeling multiphase flow in discretely fractured porous media", ADV WATER R, 23(3), 1999, pp. 261-269

Abstract

A study of the effects of grid discretization on the migration of DNAPL within a discrete-fracture network embedded in a porous rock matrix is presented. It is shown that an insufficiently fine discretization of the fractureelements can lead to an overprediction of the volume of DNAPL that continues to migrate vertically at the intersection of a vertical and horizontal fracture, Uniform discretization of elements at the scale of one centimetre (or less) accurately resolved the density and capillary pressure componentsof the head gradient in the DNAPL. An alternative, non-uniform method of discretization of elements within the discrete-fracture network is presentedwhereby only fracture elements immediately adjacent to fracture intersections are refined. To further limit the number of elements employed, the porous matrix elements adjacent to the fracture elements are not similarly refined. Results show this alternative method of discretization reduces the numerical error to an acceptable level, while allowing the simulation of field-scale DNAPL contamination problems. The results from two field-scale simulations of a DNAPL-contaminated carbonate bedrock site in Ontario, Canada are presented. These simulations compare different methods of grid discretization, and highlight the importance of grid refinement when simulating DNAPLmigration problems in fractured porous media. (C) 1999 Published by Elsevier Science Ltd; All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 04:35:05