280 citations · 4k across the 93 of their papers we have counts for
14 papers · 1 filter
Integral representation of channel flow with interacting particles
Itzhak Fouxon, Zhouyang Ge, Luca Brandt +1
We construct a boundary integral representation for the low-Reynolds-number flow in a channel in the presence of freely-suspended particles (or droplets) of arbitrary size and shap…
Suspensions of finite-size neutrally-buoyant spheres in turbulent duct flow
Walter Fornari, Hamid Tabaei Kazerooni, Jeanette Hussong +1
We study the turbulent square duct flow of dense suspensions of neutrally-buoyant spherical particles. Direct numerical simulations (DNS) are performed in the range of volume fract…
Clustering and increased settling speed of oblate particles at finite Reynolds number
Walter Fornari, Mehdi Niazi Ardekani, Luca Brandt
We study the settling of rigid oblates in quiescent fluid using interface-resolved Direct Numerical Simulations. In particular, an immersed boundary method is used to account for t…
Interface-resolved simulations of particle suspensions in Newtonian, shear thinning and shear thickening carrier fluids
Dhiya Alghalibi, Iman Lashgari, Luca Brandt +1
We present a numerical study of noncolloidal spherical and rigid particles suspended in Newtonian, shear thinning and shear thickening fluids employing an Immersed Boundary Method.…
Rheology of suspensions of viscoelastic spheres: deformability as an effective volume fraction
Marco Edoardo Rosti, Luca Brandt, Dhrubaditya Mitra
We study suspensions of deformable (viscoelastic) spheres in a Newtonian solvent in plane Couette geometry, by means of direct numerical simulations. We find that in the limit of v…
Numerical simulations of elastic capsules with nucleus in shear flow
Arash Alizad Banaei, Jean-Christophe Loiseau, Iman Lashgari +1
The shear-induced deformation of a capsule with a stiff nucleus, a model of eukaryotic cells, is studied numerically. The membrane of the cell and of its nucleus are modelled as a…
The effect of polydispersity in a turbulent channel flow laden with finite-size particles
Walter Fornari, Francesco Picano, Luca Brandt
We study turbulent channel flows of monodisperse and polydisperse suspensions of finite-size spheres by means of Direct Numerical Simulations using an immersed boundary method to a…
A numerical approach for particle-vortex interactions based on volume-averaged equations
Toshiaki Fukada, Walter Fornari, Luca Brandt +2
To study the dynamics of particles in turbulence when their sizes are comparable to the smallest eddies in the flow, the Kolmogorov length scale, efficient and accurate numerical m…
Numerical simulation of turbulent channel flow over a viscous hyper-elastic wall
Marco E. Rosti, Luca Brandt
We perform numerical simulations of a turbulent channel flow over an hyper-elastic wall. In the fluid region the flow is governed by the incompressible Navier-Stokes (NS) equations…
Statistics of particle accumulation in spatially developing turbulent boundary layers
Gaetano Sardina, Francesco Picano, Philip Schlatter +2
We present the results of a Direct Numerical Simulation of a particle-laden spatially developing turbulent boundary layer up to Reθ = 2500. Two main features differentiate the beha…
Inertial migration of spherical and oblate particles in straight ducts
Iman Lashgari, Mehdi Niazi Ardekani, Indradumna Banerjee +2
We study numerically the inertial migration of a single rigid sphere and an oblate spheroid in straight square and rectangular ducts. A highly accurate interface-resolved numerical…
Effects of the finite particle size in turbulent wall-bounded flows of dense suspensions
Pedro Costa, Francesco Picano, Luca Brandt +1
We use interface-resolved simulations to study finite-size effects in turbulent channel flow of neutrally-buoyant spheres. Two cases with particle sizes differing by a factor of 2,…
Effect of viscosity ratio on the self-sustained instabilities in planar immiscible jets
Outi Tammisola, Jean-Christophe Loiseau, Luca Brandt
Previous studies have shown that intermediate surface tension has a counterintuitive destabilizing effect on 2-phase planar jets. Here, the transition process in confined 2D jets o…
An efficient mass-preserving interface-correction level set/ghost fluid method for droplet suspensions under depletion forces
Zhouyang Ge, Jean-Christophe Loiseau, Outi Tammisola +1
Aiming for the simulation of colloidal droplets in microfluidic devices, we present here a numerical method for two-fluid systems subject to surface tension and depletion forces am…