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Combined forced-convection and buoyancy flow at a two-fluid interface in a porous medium: analytical studies
Earth Sciences Division, Lawrence Berkeley Laboratory, University of California.
Department of Building Technology, Lund Institute of Technology.
1988 (Danish)In: Water resources research, ISSN 0043-1397, E-ISSN 1944-7973, Vol. 24, no 4, p. 507-515Article in journal (Refereed) Published
Abstract [en]

The motion of a two-fluid interface in an aquifer is a combination of buoyancy flow and forced convection. The buoyancy flow, which is due to density variations of the fluid, and the forced convection, which acts on the viscosity variations, will cause the two-fluid interface to tilt. The basic case of a plane interface between two immiscible fluids of different density and viscosity in an infinite anisotropic aquifer bounded by two horizontal planes is analyzed in detail. The groundwater flow in the aquifer is treated as a superposition of buoyancy flow and forced convection. The buoyancy flow and the forced-convection components are shown by analytical methods to be related to each other. The tilting angle of the two-fluid interface is given by a simple formula containing only two parameters. There exists a certain stationary tilting angle, the stability of which depends on the two viscosities.

Place, publisher, year, edition, pages
1988. Vol. 24, no 4, p. 507-515
National Category
Water Engineering
Research subject
Water Resources Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-10121Local ID: 8de3f2f0-f1d4-11dd-ae0d-000ea68e967bOAI: oai:DiVA.org:ltu-10121DiVA, id: diva2:983061
Note
Upprättat; 1988; 20090203 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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http://www.agu.org/journals/wr/v024/i004/WR024i004p00507/

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Hellström, Göran

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