Viscoplasticity is characterized by a yield stress, below which the materials will not deform
and above which they will deform and flow according to different constitutive relations …

We examine and compare five constitutive models, which have been recently proposed to
describe the behavior of elasto-visco-plastic fluids. The comparison is performed in simple …

We solve numerically the cessation of axisymmetric Poiseuille flow of a Herschel–Bulkley
fluid under the assumption that slip occurs along the wall. The Papanastasiou regularization …

Computation of viscoplastic fluid flows has always been a challenging task. Viscoplastic
models are intrinsically discontinuous at the yielded-unyielded interface, which leads to …

We derive an expression for the velocity profile of a pressure-driven yield-stress fluid flowing
around a two-dimensional concentric annulus. This result allows the prediction of the effects …

Transient flows of viscoplastic fluids have very peculiar characteristics. The startup and
cessation flows of viscoplastic materials have been subject to many theoretical and …

We develop an asymptotic solution for the axisymmetric squeeze flow of a viscoplastic
medium. The standard lubrication-style expansions of the problem predict a plug speed …

We develop an asymptotic solution for the plane squeeze flow of a viscoplastic medium. The
standard lubrication-style expansions of the problem predict plug speed which varies slowly …

Abstract We propose a Finite Volume Method for the simulation of elastoviscoplastic (EVP)
flows, modelled after the extension to the Herschel-Bulkley model by Saramito [J. Non …

The squeeze flow of a viscoplastic material between two parallel coaxial disks with yield slip
condition at the wall is examined. The governing equations are solved employing the …