Journal of Non-Newtonian Fluid Mechanics, Vol.267, 35-50, 2019
Axisymmetric squeeze flow of a Casson medium
We develop an asymptotic solution for the axisymmetric squeeze flow of a viscoplastic Casson medium following the asymptotic technique suggested earlier by Balmforth and Craster (1999) and Frigaard and Ryan (2004). The no-slip and slip yield boundary conditions at the wall are considered. Depending on the ratio of two dimensionless parameters partial slip (stick-slip) or full slip at the wall (slip) are possible. We confirm numerically obtained solution, using Accelerated proximal gradient and Augmented Lagrangian methods.
Keywords:Viscoplastic fluid;Casson medium;Squeeze flow;Pseudo-yield surface;Slip yield condition;Pseudo-plug;Asymptotic solution