Elastic and Viscous Effects on Particle Migration in Plane‐Poiseuille Flow

Alignment and aggregation of spherical particles in viscoelastic fluid under shear flow

“…So their experiments were performed under highly shear-thinning conditions. Jefri and Zahed [2] also observed a chain structure in planar Poiseuille flow of viscoelastic suspension of 10%. Tehrani [3] reported that particles migrated to the core region in tube flow of a viscoelastic suspension.…”

On instabilities and migration phenomena in cone and plate geometry

“…Migration of particles is also observed with suspensions in viscoelastic fluids. For instance, one can mention the experiments in plane Poiseuille flow by Jefri and Zahed [13] with spheres in polymer solutions (Newtonian, viscoelastic shearthinning and non-shearthinning) or by Tehrani [14] in pipe flow with polymer gels. The comparison of the effects obtained with the different media allows the analysis of the respective contributions of the elastic and viscous effects.…”

Effects of dissolved polymer on the transport of colloidal particles through a microcapillary

“…For particles dispersed in high ionic strength PEO4 solution, the electrokinetic lift is less pronounced and hence, the particle migration is mainly affected by the viscoelastic properties of PEO4 solution. Many studies in different flow geometries [16][17][18][19][20][21][22][23] have shown that spherical particles dispersed in viscoelastic fluids would migrate to a region of lower velocity gradient, i.e., toward the inner cylinder of the couette apparatus and towards the center of the capillary. Theoretical studies of the moving particles in the viscoelastic fluids [41][42][43][44] showed that the migration of particles in the direction of decreasing shear rate is indeed generated by the normal stress of viscoelastic fluids.…”