Dynamics of elastoviscoplastic filament stretching

P Moschopoulos, E Kouni, K Psaraki, Y Dimakopoulos… - Soft Matter, 2023 - pubs.rsc.org
We study theoretically the stretching dynamics of a yield stress material that exhibits both
elastic and viscoplastic behavior. The material is confined between two coaxial disks …

A network model for gas invasion into porous media filled with yield-stress fluid

A Pourzahedi, IA Frigaard - Journal of Non-Newtonian Fluid Mechanics, 2024 - Elsevier
This study investigates the gas invasion into a porous medium filled with a yield-stress fluid.
A pore–throat network model is employed to represent the porous media, and a semi …

A new finite element formulation unifying fluid-structure and fluid-fluid interaction problems

P Moschopoulos, Y Dimakopoulos… - Journal of Non …, 2024 - Elsevier
When the accurate simulation of two materials that interact through their common and
deformable interface is of interest, the efficient treatment of the interface determines the …

Buoyancy induced motion of a Newtonian drop in elastoviscoplastic materials

G Esposito, Y Dimakopoulos, J Tsamopoulos - Journal of Rheology, 2024 - pubs.aip.org
We investigate theoretically the buoyancy-driven motion of a viscous drop in a yield-stress
material, incorporating elastic effects represented by the Saramito–Herschel–Bulkley …

[HTML][HTML] Analytical solution of the Poiseuille flow of a De Kee viscoplastic fluid

A Syrakos, A Charalambous, GC Georgiou - Applications in Engineering …, 2024 - Elsevier
We provide an explicit analytical solution of the planar Poiseuille flow of a viscoplastic fluid
governed by the constitutive equation proposed by De Kee and Turcotte (1980). Formulae …

Acceleration of a projected gradient algorithm for the Bingham flow problem by rigidity enforcement with penalty

N Roquet - Journal of Engineering Mathematics, 2024 - Springer
A new modification to the classical projected gradient method is introduced for the Bingham
model in viscoplastic flows. In these flows, large regions may exist where the velocity field is …

[PDF][PDF] Applications in Engineering Science

A Syrakos, A Charalambous, GC Georgiou - researchgate.net
We provide an explicit analytical solution of the planar Poiseuille flow of a viscoplastic fluid
governed by the constitutive equation proposed by De Kee and Turcotte (1980). Formulae …