Show simple item record

dc.contributor.authorSEFRIOUI, Nisrine
dc.contributor.author
 hal.structure.identifier
AHMADI-SENICHAULT, Azita
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.author
 hal.structure.identifier
BERTIN, Henri
17163 Transferts, écoulements, fluides, énergétique [TREFLE]
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.authorOMARI, Aziz
dc.date.accessioned2015
dc.date.available2015
dc.date.issued2012
dc.date.submitted2015
dc.identifier.urihttp://hdl.handle.net/10985/9928
dc.description.abstractThe 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 simulations of the transport of a single particle near the fluid/solid interface have been performed. For this purpose, new routines have been implemented in a research code in order to take into account DLVO forces for smooth and rough pore surfaces. A dimensional analysis is performed, pointing out the important role of the ratio of electrostatic forces to the hydrodynamic forces on the particle behaviour. The test cases considered are chosen on the basis of experimental results presented in the literature. Transport of a particle near a solid surface is simulated for a given Reynolds number at different values of ionic strength and the influence of various surface roughness types are analysed. The simulations illustrate three different behaviours: (i) the particle is transported by the bulk fluid (ii) the particle is adsorbed and rolls on the solid surface (iii) the particle is adsorbed by the surface and is blocked. An analysis in terms of residence time is proposed. Simulations also show that an increase in the Reynolds number leads to the mobilisation of the particle in all cases studied.
dc.language.isoen
dc.rightsPre-print
dc.subjectPorous media
dc.subjectColloid transport
dc.subjectIonic strength
dc.subjectRough pore surfaces
dc.titleDirect numerical simulation of colloid transport at the microscopic scale: influence of ionic strength in the presence of a rough surface
dc.typdocCommunication sans acte
dc.localisationCentre de Bordeaux-Talence
dc.subject.halSciences de l'ingénieur: Mécanique: Mécanique des fluides
ensam.conference.title4th International Conference on Porous Media & Annual Meeting of the International Society for Porous Media
ensam.conference.date2012-05-14
ensam.countryEtats-Unis
ensam.cityWest Lafayette
hal.identifierhal-01193300
hal.version1
hal.submission.permittedupdateFiles
hal.statusaccept


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record