ETUDE EXPERIMENTALE DU TRANSPORT DE PART ICULES EN SUSPENSIONS ET DU TR ACEUR DISSOUT (FLUORESCEIN E) DANS UN MILIEU POREUX SAT URE
Journal Title: Larhyss Journal - Year 2016, Vol 27, Issue 27
Abstract
In this article, we presented the results of an experimental study of transport and deposition of silt suspended particles (modal diameter 7 μm) in a laboratory column filled with gravel. The tracer tests are performed at different velocities by continuous injections of suspended particles and of dissolved tracer. The hydro-dispersive parameters are determined from the experimental calibration curves by the analytical solution for a continuous injection of the convectiondispersion equation with the deposition kinetics of first order. The results show that the restitution of particles and deposition kinetics, increase with the flow velocity. The kinetics of deposit increases with speed and follows a power law. The retention decreases with flow velocity. The dispersion of the particles is slightly higher than that of the dissolved tracer; it increases with the pore velocity in a non-linear way. The analysis of the size distribution of restituted particles by the laser granulometer showed that the larger particles arrive first and then the fine for all tested speeds. The restituted particles size increases with speed. The suspended particles are carried with a delay relative to the dissolved tracer.
Authors and Affiliations
IKNI T. | Laboratoire de Recherche en Hydraulique Appliquée et environnement (LRHAE), Département d’Hydraulique, Université de Bejaia, Algérie, BERREKSI A. | Laboratoire de Recherche en Hydraulique Appliquée et environnement (LRHAE), Département d’Hydraulique, Université de Bejaia, Algérie, BENKADJA R. | Département d’Hydraulique, Université de M’Sila, Algérie, NEBBAR M. L. | Département d’Hydraulique, Université de M’Sila, Algérie, KADRI M. | Département de génie civil, Université de Boumerdes, Algérie, BENAMAR A. | Laboratoire Ondes et Milieux Complexes, Université du Havre, France
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- EP ID EP15228
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