Variable-density flow in heterogeneous porous media : laboratory experiments and numerical simulations

Konz, M. and Younes, A. and Ackerer, R. and Fahs, M. and Huggenberger, P. and Zechner, E.. (2009) Variable-density flow in heterogeneous porous media : laboratory experiments and numerical simulations. Journal of contaminant hydrology, Vol. 108, H. 3/4. pp. 168-175.

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Official URL: http://edoc.unibas.ch/dok/A5251222

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Konz, M., Ackerer, R, Younes, A., Huggenberger, P., Zechner. E., 2009a. 2D Stable Layered Laboratory-scale Experiments for Testing Density-coupled Flow Models. Water Resources Research, 45. doi:10.1029/2008WR007118., a series of laboratory-scale 2D tank experiments were conducted and accurately simulated for density driven flow problems on homogeneous porous media. In the present work, we extended the numerical and experimental studies to heterogeneous problems. The heterogeneous porous medium was constructed with a low permeability zone in the centre of the tank and had well-defined parameters and boundary conditions. Concentration distributions were measured in high resolution using a photometric method and an image analysis technique. The numerical model used for the simulations was based on efficient advanced approximations for both spatial and temporal discretizations. The Method Of Lines (MOL) was used to allow higher-order temporal discretization. Three different boundary conditions, corresponding to different localizations of the inflow and the outflow openings at the opposite edges of the tank, were applied to investigate different flow scenarios in the heterogeneous porous medium flow tank. Simulation results of all three density coupled experiments revealed a density-dependent behavior of dispersion. Thus, a reduction of dispersivites was required to obtain a good matching of the experimental data. The high quality of the experiments enabled a detailed testing of numerical variable-density flow codes under heterogeneous conditions. Therefore, the experiments were considered to be reliable benchmark tests. (C) 2009 Elsevier B.V. All rights reserved.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Ehemalige Einheiten Umweltwissenschaften > Applied Geology (Huggenberger)
UniBasel Contributors:Huggenberger, Peter and Zechner, Eric
Item Type:Article
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:29
Deposited On:22 Mar 2012 14:08

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