Yield stress and wall slip phenomena in colloidal silica gels

By H. J. Walls, S. Caines, Angelica M. Sanchez, Saad A. Khan. 2003

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Nonlinear rheology of colloidal gels with intermediate volume fraction (2011, background): “…roughened geometries have been attributed to slip at the smooth s w f e b r h r m b s d c h s p d a p d C n f e i t t i n d a o t s t G p urfaces Walls et al. 2003 , while the frequency dependence is in qualitative agreement ith findings in colloidal glasses under steady shear where slip is…”
Slip at Fluid-Solid Interface (2011, methodology): “Another example of slip-related plateaux is the Newtonian plateau at very low shear rates, as observed for instance in some yieldstress fluids [68, 80, 121], which hides the viscoplastic nature of these materials, as will be discussed in § 10.”
Carboxymethylated nanofibrillated cellulose: rheological studies (2014, unknown): “At sufficiently high shear rates, the velocity of the fluid next to the wall is higher than that of the bulk material; which in the extreme case leads to a particle-free fluid near the walls, while the bulk material remains virtually intact (Walls et al. 2003).”