Macroscopic modeling of colloids adsorption in porous media
TypeCommunications avec actes
Natural porous media such as soils or aquifers, contain colloidal particles. Depending on geochemical and hydrodynamic conditions, they can be transported by water, developing high reactivity and mobility. They may therefore act as vectors of pollutants and viruses dissemination in soils and groundwater. Some colloidal particles like bacteria are also likely to present a risk to the environment and health. However, adsorption of colloids on the solid matrix may severely limit their mobility in porous media, consequently, their fate depends on physico-chemical and hydrodynamic conditions. Previous experimental studies  highlighted the role of ionic strength and Peclet number on both adsorption and release of particles. The objective of this work is to propose a macroscopic model (Darcy scale) that accurately describes the transport of colloids in the presence of adsorption process observed experimentally.
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SEFRIOUI, Nisrine; AHMADI-SENICHAULT, Azita; OMARI, Aziz; BERTIN, Henri (Elsevier, 2013)Transport of a solid colloidal particle was simulated at the pore scale in presence of surface roughness and particle/pore physicochemical interaction by adopting a “one fluid” approach. A code developed in our laboratory ...
SEFRIOUI, Nisrine; AHMADI-SENICHAULT, Azita; BERTIN, Henri; OMARI, Aziz (SFP, 2011)Les milieux poreux naturels, comme les sols ou les aquifères, contiennent des particules colloïdales naturelles dont le diamètre est inférieur au micron. Selon des conditions hydrodynamiques et géochimiques, celles-ci ...
AHMADI-SENICHAULT, Azita; CANSECO, Vladimir; SEFRIOUI-CHAIBAINOU, Nisrine; OMARI, Aziz; BERTIN, Henri (Trans Tech Publications Inc., 2016)The main objective of this paper is to give more insight on colloids deposition and re-entrainment in presence of a rough surface. Experiments on retention and release of colloids in a porous medium are first presented. ...
On the influence of ionic strength on colloid transport in porous media in the presence of a rough surface : numerical simulation at the microscopic scale SEFRIOUI, Nisrine; AHMADI-SENICHAULT, Azita; BERTIN, Henri; OMARI, Aziz (IFP Energies nouvelles, 2012)The understanding of Colloids transport, deposit or detachment in porous media is of central importance in many practical problems such as filtration, environmental issues and petroleum engineering. In particular, the ...
Direct numerical simulation of colloid transport at the microscopic scale: influence of ionic strength in the presence of a rough surface SEFRIOUI, Nisrine; AHMADI-SENICHAULT, Azita; BERTIN, Henri; OMARI, Aziz (2012)The way colloids are transported, deposited or detached in porous media is of great importance in many practical problems such as filtration, environmental issues, petroleum engineering, … In this work, direct numerical ...