Hydrodynamic attraction of immobile particles due to interfacial forces.
Applying the method of reflections, we derive the flow pattern around a confined colloidal particle with quasislip conditions at its surface, in powers of the ratio a/h of particle radius and wall distance. The lowest order corresponds to a single reflection at the confining wall. Significant corrections occur at higher order: the linear term in a/h modifies the amplitudes of the well-known one-reflection approximation, whereas new features arise in quadratic order. Our results agree with recent experiments where thermo-osmosis drives hydrodynamic attractive forces in confined colloids.
Morthomas
Julien
J
CPMOH, Université Bordeaux 1, CNRS, 351 Cours de la Libération, 33405 Talence, France.
Würger
Alois
A
D001703:Biophysics / Q000379:methods*; D003102:Colloids / Q000737:chemistry*; D057446:Hydrodynamics; D007700:Kinetics; D015233:Models, Statistical; D010316:Particle Size; D012997:Solvents / Q000737:chemistry; D013696:Temperature
D003102:Colloids; D012997:Solvents