95 citations · 195 across the 11 of their papers we have counts for
11 papers
Elasto-visco-plastic flows in benchmark geometries: II. Flow around a Confined Cylinder
Milad Mousavi, Yannis Dimakopoulos, John Tsamopoulos
We examine computationally the two-dimensional flow of elastoviscoplastic (EVP) fluids around a cylinder symmetrically placed between two plates parallel to its axis. The Saramito-…
Hydrodynamic interaction between coaxially rising bubbles in elasto-visco-plastic materials: Bubbles with a wide range of relative sizes
Athanasios Kordalis, Yannis Dimakopoulos, John Tsamopoulos
We consider the buoyancy-driven rise and interaction between two gravity-aligned bubbles of wide radii ratio and constant volume in an elasto-visco-plastic (EVP) material, extendin…
Buoyancy induced motion of a Newtonian drop in elastoviscoplastic materials
Giancarlo Esposito, Yannis Dimakopoulos, John Tsamopoulos
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 con…
Elasto-visco-plastic flows in benchmark geometries: I. 4 to 1 Planar Contraction
Milad Mousavi, Yannis Dimakopoulos, John Tsamopoulos
We present predictions for the flow of elastoviscoplastic (EVP) fluids in the 4 to 1 planar contraction geometry. The Saramito-Herschel-Bulkley fluid model is solved via the finite…
A unification of least-squares and Green-Gauss gradients under a common projection-based gradient reconstruction framework
Alexandros Syrakos, Oliver Oxtoby, Eugene de Villiers +3
We propose a family of gradient reconstruction schemes based on the solution of over-determined systems by orthogonal or oblique projections. In the case of orthogonal projections,…
A family of first-order accurate gradient schemes for finite volume methods
Oliver Oxtoby, Alexandros Syrakos, Eugene de Villiers +3
A new discretisation scheme for the gradient operator, suitable for use in second-order accurate Finite Volume Methods (FVMs), is proposed. The derivation of this scheme, which we…
Oscillations of small bubbles and medium yielding in elastoviscoplastic fluids
Marco De Corato, Brice Saint-Michel, George Makrigiorgios +3
We investigate the radial oscillations of small gas bubbles trapped in yield-stress fluid and driven by an acoustic pressure field. We model the rheological behavior of the yield-s…
A finite volume method for the simulation of elastoviscoplastic flows and its application to the lid-driven cavity case
Alexandros Syrakos, Yannis Dimakopoulos, John Tsamopoulos
We propose a Finite Volume Method for the simulation of elastoviscoplastic flows, modelled after the extension to the Herschel-Bulkley model by Saramito [J. Non-Newton. Fluid Mech.…
Theoretical study of the flow in a fluid damper containing high viscosity silicone oil: effects of shear-thinning and viscoelasticity
Alexandros Syrakos, Yannis Dimakopoulos, John Tsamopoulos
The flow inside a fluid damper where a piston reciprocates sinusoidally inside an outer casing containing high-viscosity silicone oil is simulated using a Finite Volume method, at…
A critical analysis of some popular methods for the discretisation of the gradient operator in finite volume methods
Alexandros Syrakos, Stylianos Varchanis, Yannis Dimakopoulos +2
Finite volume methods (FVMs) constitute a popular class of methods for the numerical simulation of fluid flows. Among the various components of these methods, the discretisation of…
Viscoplastic flow in an extrusion damper
Alexandros Syrakos, Yannis Dimakopoulos, Georgios C. Georgiou +1
Numerical simulations of the flow in an extrusion damper are performed using a finite volume method. The damper is assumed to consist of a shaft, with or without a spherical bulge,…