We report a new surface phenomenon in flowing colloidal suspensions of anisotropic particles. It is characterized by a decrease in the probability of presence of the solute particles near the cell walls when the solution is submitted to Poiseuille flows exceeding a minimum shear rate. The effect has been detected on dilute aqueous solutions of xanthan, a wormlike polysaccharide chain, by using the optical evanescent-wave-induced fluorescence method. The results obtained at various shear rates are in quantitative agreement with a simple model based on the chain dynamics near the repulsive wall, and taking into account the increased molecular tumbling rate induced by the shearing flow.
No takes yet. Share an insight, caveat, or question.
Ausserré et al. (1991) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: