280 citations · 4k across the 93 of their papers we have counts for
14 papers · 1 filter
Turbulence modulation by finite-size spherical particles in Newtonian and viscoelastic fluids
Sagar Zade, Fredrik Lundell, Luca Brandt
We experimentally investigate the influence of finite-size spherical particles in turbulent flows of a Newtonian and a drag reducing viscoelastic fluid at varying particle volume f…
Buoyant finite-size particles in turbulent duct flow
Sagar Zade, Walter Fornari, Fredrik Lundell +1
Particle Image Velocimetry (PIV) and Particle Tracking Velocimetry (PTV) have been employed to investigate the dynamics of finite-size spherical particles, slightly heavier than th…
Turbulent channel flow of finite-size spherical particles with viscous hyper-elastic walls
M. N. Ardekani, M. E. Rosti, L. Brandt
We study single-phase and particulate turbulent channel flows, bounded by two incompressible hyper-elastic walls. Different wall elasticities are considered with and without a 10%…
Flowing fibers as a proxy of turbulence statistics
Marco Edoardo Rosti, Stefano Olivieri, Arash A. Banaei +2
The flapping states of a flexible fiber fully coupled to a three-dimensional turbulent flow are investigated via state-of-the-art numerical methods. Two distinct flapping regimes a…
Hemorheology in dilute, semi-dilute and dense suspensions of red blood cells
Naoki Takeishi, Marco E. Rosti, Yohsuke Imai +2
We present a numerical analysis of the rheology of a suspension of red blood cells (RBCs) in a wall-bounded shear flow. The flow is assumed as almost inertialess. The suspension of…
Turbulent duct flow with polymers
Armin Shahmardi, Sagar Zade, Mehdi N. Ardekani +4
We have performed direct numerical simulation of the turbulent flow of a polymer solution in a square duct, with the FENE-P model used to simulate the presence of polymers. First,…
Experimental investigation of turbulent suspensions of spherical particles in a square duct
Sagar Zade, Pedro Costa, Walter Fornari +2
We report experimental observations of turbulent flow with spherical particles in a square duct. Three particle sizes namely: = 40, 16 and 9 ( being the duct full he…
Turbulent channel flow of an elastoviscoplastic fluid
Marco Edoardo Rosti, Daulet Izbassarov, Outi Tammisola +2
We present numerical simulations of laminar and turbulent channel flow of an elastoviscoplastic fluid. The non-Newtonian flow is simulated by solving the full incompressible Navier…
Numerical simulations of emulsions in shear flows
Marco Edoardo Rosti, Francesco De Vita, Luca Brandt
We present a modification of a recently developed volume of fluid method for multiphase problems, so that it can be used in conjunction with a fractional step-method and fast Poiss…
Effective slip over partially filled microcavities and its possible failure
Zhouyang Ge, Hanna Holmgren, Martin Kronbichler +2
Motivated by the emerging applications of liquid-infused surfaces (LIS), we study the drag reduction and robustness of transverse flows over two-dimensional microcavities partially…
Computational modeling of multiphase viscoelastic and elastoviscoplastic flows
Daulet Izbassarov, Marco E. Rosti, M. Niazi Ardekani +4
In this paper, a three-dimensional numerical solver is developed for suspensions of rigid and soft particles and droplets in viscoelastic and elastoviscoplastic (EVP) fluids. The p…
Turbulent channel flow over an anisotropic porous wall - Drag increase and reduction
Marco Edoardo Rosti, Luca Brandt, Alfredo Pinelli
The effect of the variations of the permeability tensor on the close-to-the-wall behaviour of a turbulent channel flow bounded by porous walls is explored using a set of direct num…
Suspensions of deformable particles in a Couette flow
Marco Edoardo Rosti, Luca Brandt
We consider suspensions of deformable particles in a Newtonian fluid by means of fully Eulerian numerical simulations with a one-continuum formulation. We study the rheology of the…
Flexible fiber reveals the two-point statistical properties of turbulence
Marco Edoardo Rosti, Arash Alizad Banaei, Luca Brandt +1
We study the dynamics of a flexible fiber freely moving in a three-dimensional fully-developed turbulent field and present a phenomenological theory to describe the interaction bet…