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… 
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References

SHOWING 1-10 OF 75 REFERENCES
Numerical simulation of a concentrated emulsion in shear flow
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
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
The characterization of the total stress of concentrated suspensions of noncolloidal spheres in Newtonian fluids
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
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
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
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
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
DIRECT NUMERICAL SIMULATION OF FREE-SURFACE AND INTERFACIAL FLOW
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
...
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