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Titolo: 3DIMENSIONAL ANALYSIS OF VARIABLYSATURATED FLOW AND SOLUTE TRANSPORT IN DISCRETELYFRACTURED POROUSMEDIA
Autore: THERRIEN R; SUDICKY EA;
 Indirizzi:
 UNIV LAVAL,DEPT GEOL & GENIE GEOL QUEBEC CITY PQ G1K 7P4 CANADA UNIV WATERLOO,WATERLOO CTR GROUNDWATER RES WATERLOO ON N2L 3G1 CANADA
 Titolo Testata:
 Journal of contaminant hydrology
fascicolo: 12,
volume: 23,
anno: 1996,
pagine: 1  44
 SICI:
 01697722(1996)23:12<1:3AOVFA>2.0.ZU;2T
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 TRANSFORM GALERKIN TECHNIQUE; FINITEELEMENT TECHNIQUES; MASSTRANSPORT; HYDRAULIC CONDUCTIVITY; CONTAMINANT TRANSPORT; NUMERICALSOLUTION; UNSATURATED FLOW; GROUNDWATERFLOW; POROSITY MEDIA; WATERFLOW;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Science Citation Index Expanded
 Science Citation Index Expanded
 Citazioni:
 56
 Recensione:
 Indirizzi per estratti:



 Citazione:
 R. Therrien e E.A. Sudicky, "3DIMENSIONAL ANALYSIS OF VARIABLYSATURATED FLOW AND SOLUTE TRANSPORT IN DISCRETELYFRACTURED POROUSMEDIA", Journal of contaminant hydrology, 23(12), 1996, pp. 144
Abstract
A discrete fracture, saturatedunsaturated numerical model is developed where the porous matrix is represented in three dimensions and fractures are represented by twodimensional planes. This allows a fully threedimensional description of the fracture network connectivity, Solute advection and diffusion in the porous matrix are also directly accounted for, The variablysaturated flow equation is discretized in space using a control volume finiteelement technique which ensures fluidconservation both locally and globally. Because the relative permeability and saturation curves for fractures may be highly nonlinear, and in strong contrast to those of the matrix, the robust NewtonRaphson iteration method is implemented according to the efficient procedure ofKropinski (1990) and Forsyth and Simpson (1991) to solve the variablysaturated flow equation. Upstream weighting of the relative permeabilities is used to yield a monotone solution that lies in the physical range and adaptive time stepping further enhances the efficiency of thesolution process, A timemarching Galerkin finiteelement technique is used to discretize the solute transport equation. Although the methodology is developed in a finiteelement framework, a finitedifferencediscretization for both groundwater flow and solute transport can be mimicked through a manipulation of the influence coefficient technique. The use of an ILUpreconditioned ORTHOMIN solver permits the fast solution of matrix equations having tens to hundreds of thousands of unknowns. Verification examples are presented along with illustrative problems that demonstrate the complexity of variablysaturated flow and solute transport in fractured systems.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 05:43:37