EXPERIMENTAL STUDY OF MASS TRANSPORT IN SATURATED POROUS MEDIA: "MODELING IN THE LABORATORY"
Journal Title: Larhyss Journal - Year 2017, Vol 29, Issue 29
Abstract
This work is part of the understanding of the mechanisms of transport and retention of suspended matter in a saturated porous medium. It concerns the transport of suspended particles (SP) and the dissolved tracer (DT). The experiments are based on instantaneous injections of these two tracers (SP and DT). The tracing was carried out for a Darcy velocity range from 0.052 to 0.285 cm/s, the purpose of which is to study the influence of flow velocity on the phenomenon of transport and deposition of suspended particles. An analytical model of convection-dispersion with first order deposition kinetics made it possible to adjust the restitution curves and to deduce the hydro-dispersive parameters. This experimental study made it possible to demonstrate that the particles in suspension arrive behind the dissolved tracer (fluorescein). This difference in behavior is attributed mainly to the weights, size and frequency of collision of the particles with the grains of the medium. This study also showed that the rate of restitution and dispersion increase with speed. The retention rate and the filtration coefficient decrease as the speed increases.
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, BELHOCINE M. | Laboratoire de Recherche en Hydraulique Appliquée et environnement (LRHAE), Département d’Hydraulique, Université de Bejaia, Algérie, NEBBAR M. L. | Département d’Hydraulique, Université de M’Sila, Algérie, BENKADJA R. | Département d’Hydraulique, Université de M’Sila, Algérie
Keywords
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