Numerical simulations of emulsions in shear flows
@article{Rosti2018NumericalSO, title={Numerical simulations of emulsions in shear flows}, author={Marco Edoardo Rosti and Francesco De Vita and Luca Brandt}, journal={Acta Mechanica}, year={2018}, volume={230}, pages={667-682} }
We present a modification of a recently developed volume of fluid method for multiphase problems (Ii et al. in J Comput Phys 231(5):2328–2358, 2012), so that it can be used in conjunction with a fractional-step method and fast Poisson solver, and validate it with standard benchmark problems. We then consider emulsions of two-fluid systems and study their rheology in a plane Couette flow in the limit of vanishing inertia. We examine the dependency of the effective viscosity $$\mu $$μ on the…
36 Citations
Modulation of homogeneous and isotropic turbulence in emulsions
- PhysicsJournal of Fluid Mechanics
- 2022
Abstract We present a numerical study of emulsions in homogeneous and isotropic turbulence (HIT) at $Re_\lambda =137$. The problem is addressed via direct numerical simulations, where the volume of…
Shear-thinning and shear-thickening emulsions in shear flows
- Physics
- 2021
We study the rheology of a two-fluid emulsion in semi-concentrated conditions; the solute is Newtonian while the solvent an inelastic power law fluid. The problem at hand is tackled by means of…
On the effect of coalescence on the rheology of emulsions
- PhysicsJournal of Fluid Mechanics
- 2019
We present a numerical study of the rheology of a two-fluid emulsion in dilute and semidilute conditions. The analysis is performed for different capillary numbers, volume fractions and viscosity…
Numerical study of filament suspensions at finite inertia
- PhysicsJournal of Fluid Mechanics
- 2020
We present a numerical study on the rheology of semi-dilute and concentrated filament suspensions of different bending stiffness and Reynolds number, with the immersed boundary method used to couple…
Suspensions of deformable particles in Poiseuille flows at finite inertia
- Physics
- 2020
We analyze a suspension of deformable particles in a pressure-driven flow. The suspension is composed of neutrally buoyant initially spherical particles and a Newtonian carrier fluid, and the flow is…
Dynamics of phase separation of sheared inertialess binary mixtures
- Physics
- 2020
When a viscous binary mixture subject to an applied shear flow is rapidly quenched into the unstable region of its phase diagram, the resulting phase separation is influenced by two competing…
Breakage, coalescence and size distribution of surfactant-laden droplets in turbulent flow
- PhysicsJournal of Fluid Mechanics
- 2019
In this work, we compute numerically breakage/coalescence rates and size distribution of surfactant-laden droplets in turbulent flow. We use direct numerical simulation of turbulence coupled with a…
Droplets in homogeneous shear turbulence
- PhysicsJournal of Fluid Mechanics
- 2019
We simulate the flow of two immiscible and incompressible fluids separated by an interface in a homogeneous turbulent shear flow at a shear Reynolds number equal to 15 200. The viscosity and density…
Finite-size evaporating droplets in weakly compressible homogeneous shear turbulence
- PhysicsJournal of Fluid Mechanics
- 2022
Abstract We perform interface-resolved simulations of finite-size evaporating droplets in weakly compressible homogeneous shear turbulence. The study is conducted by varying three dimensionless…
References
SHOWING 1-10 OF 75 REFERENCES
Numerical simulation of a concentrated emulsion in shear flow
- Engineering, PhysicsJournal of Fluid Mechanics
- 1996
A three-dimensional computer simulation of a concentrated emulsion in shear flow has been developed for low-Reynolds-number finite-capillary-number conditions. Numerical results have been obtained…
Rheology of a dense suspension of spherical capsules under simple shear flow
- EngineeringJournal of Fluid Mechanics
- 2015
We present a numerical analysis of the rheology of a dense suspension of spherical capsules in simple shear flow in the Stokes flow regime. The behaviour of neo-Hookean capsules is simulated for a…
Suspensions of deformable particles in a Couette flow
- EngineeringJournal of Non-Newtonian Fluid Mechanics
- 2018
The characterization of the total stress of concentrated suspensions of noncolloidal spheres in Newtonian fluids
- Engineering
- 2000
The total stress of a concentrated suspension of noncolloidal spheres in a Newtonian fluid was characterized by independent measurements in viscometric flows. Using a suspension balance formulation,…
Suspension properties at finite Reynolds number from simulated shear flow
- Physics
- 2008
This work examines the role of particle-scale inertia in a monodisperse suspension of non-Brownian and neutrally buoyant spherical particles subjected to simple-shear flow. The dimensionless…
Turbulent channel flow of dense suspensions of neutrally buoyant spheres
- Physics, EngineeringJournal of Fluid Mechanics
- 2015
Abstract Dense particle suspensions are widely encountered in many applications and in environmental flows. While many previous studies investigate their rheological properties in laminar flows,…
Numerical Simulation of Concentrated Emulsion Flows
- Physics, Engineering
- 1998
The macroscopic flow and detailed microphysics of a concentrated emulsion are described with three-dimensional numerical simulations. Numerical predictions for deformable drop interactions in…
Elastoviscoplastic flow in porous media
- Engineering, Physics
- 2018
We investigate the elastoviscoplastic flow through porous media by numerical simulations. We solve the Navier-Stokes equations combined with the elastoviscoplastic model proposed by Saramito for the…
Elastoviscoplastic flows in porous media
- Engineering, PhysicsJournal of Non-Newtonian Fluid Mechanics
- 2018
DIRECT NUMERICAL SIMULATION OF FREE-SURFACE AND INTERFACIAL FLOW
- Physics
- 1999
The numerical simulation of flows with interfaces and free-surface flows is a vast topic, with applications to domains as varied as environment, geophysics, engineering, and fundamental physics. In…