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An experimental study of recirculating flow through fluid-sediment interfaces

Khalili, A. and Basu, A.J. and Pietrzyk, U. and Raffel, M. (1999) An experimental study of recirculating flow through fluid-sediment interfaces. Journal of Fluid Mechanics, Vol. 383, pp. 229-247.

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We report here visualizations and quantitative measurements of scalar transport, under the influence of rotation, through permeable sediments with an overlying fluid layer. The experimental set-up considered here is a stationary cylinder containing a fluid-saturated porous medium up to its midheight, with supernatant water on top. A rotating lid generates, in the upper fluid region, a flow that partially percolates into the porous layer below. The velocity field in the fluid layer is obtained using particle image velocimetry (PIV). Further, dye transport from the sediment is studied using two different techniques. The first one is positron emission tomography (PET), a non-invasive method which allowed us to see through the opaque solid matrix, and to obtain full three-dimensional pictures of dye transport through the sediment. The second one is digital photographic visualization from outside, and subsequent image processing in order to obtain the near-wall dye-washout depth. The experimental data suggest that the temporal evolution of washout depth for different sediments follows near-logarithmic behaivour. This finding is of importance for the a priori estimation of the transport of fluid and other solute substances in sandy aquatic sediments

Item URL in elib:https://elib.dlr.de/13552/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=1999,
Title:An experimental study of recirculating flow through fluid-sediment interfaces
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:Journal of Fluid Mechanics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Volume:Vol. 383
Page Range:pp. 229-247
Keywords:non-invasive method, PIV, PET, sediment, dye-washout
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik
Deposited By: DLR-Beauftragter, elib
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:37

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