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 …

The third edition of Bubbles, Drops, and Particles in Non-Newtonian Fluids provides
comprehensive coverage of the scientific foundations and the latest advances in particle …

Flows of materials with yield are analysed by using a continuous viscoplastic equation
(CVE) that eliminates the necessity of tracking material yield surfaces. These flows are …

Herschel–Bulkley fluids are materials that behave as rigid solids when the local stress τ is
lower than a finite yield stress τ 0, and flow as nonlinearly viscous fluids for τ> τ 0. The flow …

Numerical simulations have been undertaken for the creeping flow of a Bingham plastic past
a sphere contained in a cylindrical tube. Different diameter ratios have been studied ranging …

The present paper considers the problem of predicting motionless regions and true plug
(constant velocity areas where the stress is below the yield stress) regimes for fully three …

Entry and exit flows through extrusion dies are studied numerical by for Bingham fluids
exhibiting a yield stress. A constitutive equation proposed by Papanastasiou is used, which …

A modified Herschel–Bulkley model [E. Mitsoulis, SS Abdali, Flow simulation of Herschel–
Bulkley fluids through extrusion dies, Can. J. Chem. Eng. 71 (1993) 147–160] predicts an …

In this paper we study steady flow of Herschel–Bulkley fluids in a canonical three-
dimensional expansion. The fluid behavior was modeled using a regularized continuous …

The flow of viscoplastic materials through extrusion dies has been studied numerically using
the finite element method. Rheological data for viscoplastic doughs have been fitted by the …