Effect of confinement in wall-bounded non-colloidal suspensions
نویسندگان
چکیده
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Effect of confinement in wall-bounded non-colloidal suspensions Stany Gallier, Elisabeth Lemaire, Laurent Lobry, Francois Peters
منابع مشابه
Driven colloidal suspensions in confinement and density functional theory: microstructure and wall-slip.
We theoretically investigate general properties of driven (sheared) colloidal suspensions in confinement, based on methods of classical density functional theory. In the absence of an exact closed (Smoluchowski-) equation for the one-particle density under shear, we formulate a set of general conditions for approximations, and show that a simple closure fulfills them. The exact microscopic stre...
متن کاملHydrodynamics on Charged Superparamagnetic Microparticles in Water Suspension: Effects of Low-Confinement Conditions and Electrostatics Interactions
The study of colloidal dispersions of micro-nano sized particles in a liquid is of great interest for industrial processes and technological applications. The understanding of the microstructure and fundamental properties of this kind of systems at microscopic level is also useful for biological and biomedical applications. However, a colloidal suspension must be placed somewhere and the dynami...
متن کاملConfinement-induced solidification of colloid-polymer depletion mixtures.
Using a model colloid-polymer suspension, we show that confinement induces solidification in attractive colloidal suspensions via a fundamentally different route from that active in hard sphere colloidal suspensions. For a range of polymer concentrations, the suspensions undergo a phase transition from a colloidal fluid of clusters to a colloidal gel as confinement increases while polymer and p...
متن کاملDynamics of confined colloid-polymer mixtures
We investigate the effect of confinement on particle dynamics in mixtures of colloidal particles and non-adsorbing depletant polymers that serve as models for attractive suspensions. Holding the volume fraction of particles and the polymer concentration constant, the dynamics of the particles become increasingly slow as the suspensions are confined in thin wedgeshaped cells. Confocal micrograph...
متن کاملA new cross - streamline particle migration mechanism in a dilute suspension of spheres in shear flow confined by planar walls
The effects of confinement on the dynamics of binary encounters between spherical particles in shear flow are studied for a system bounded by a single planar wall or two parallel planar walls under creeping flow conditions. We show that wall proximity gives rise to a new class of binary trajectories resulting in cross-streamline migration of the particles. In contrast, in unbounded space spheri...
متن کامل