Person
Lorenzo Siconolfi
This person is no longer with EPFL
Related publications (8)
Investigation of the symmetry-breaking instability in a T-mixer with circular cross section
This paper investigates the laminar flow inside a T-mixer composed of three pipes with a circular cross section. The flow enters the mixer symmetrically from the two aligned pipes and leaves the device from the third pipe. In similar devices, but involving ...
AMER INST PHYSICS2020Influence of the inlet velocity profile on the flow stability in a symmetric channel expansion
François Gallaire, Lorenzo Siconolfi, Robin Debuysschère
In a channel flow with a sudden expansion, whether for three-dimensional (3-D) pipe and channel flows, or for two-dimensional (2-D) channel flow, it is known that increasing the Reynolds number beyond a critical value induces a symmetry breaking Pitchfork ...
CAMBRIDGE UNIV PRESS2020Flow dynamics of a dandelion pappus: A linear stability approach
François Gallaire, Pier Giuseppe Ledda, Francesco Viola, Lorenzo Siconolfi
The study and control of flow instabilities is a key problem in aerodynamics. Aircrafts are designed not only to generate the lift force needed to balance their weight but, more importantly, to be stable and reasonably steady when in cruise conditions. Sim ...
2019Hydrodynamic loading of perforated disks in creeping flows
François Gallaire, Pedro Miguel Nunes Pereira de Almeida Reis, Lorenzo Siconolfi, Matteo Pezzulla
We present results from an experimental investigation of a viscous fluid driven through and around porous disks at low and moderate Reynolds number conditions: Re = O(10(-4)-10(-3)) and Re = O(1-10). Specifically, we quantify the hydrodynamic drag that the ...
AMER PHYSICAL SOC2019Suppression of von Karman vortex streets past porous rectangular cylinders
François Gallaire, Pier Giuseppe Ledda, Francesco Viola, Lorenzo Siconolfi
Although the stability properties of the wake past impervious bluff bodies have been widely examined in the literature, similar analyses regarding the flow around and through porous ones are still lacking. In this work, the effect of the porosity and perme ...
2018Effect of geometry modifications on the engulfment in micromixers: Numerical simulations and stability analysis
Andrea Fani, Lorenzo Siconolfi
The effect of geometry variations on the engulfment regime in micromixers is investigated. The engulfment regime is a steady flow regime resulting from a symmetry-breaking pitchfork bifurcation as the Reynolds number (based on the hydraulic diameter and bu ...
Elsevier2016Stability analysis of boundary layers controlled by miniature vortex generators
It is currently known that Tollmien–Schlichting (TS) waves can be attenuated by the introduction of spanwise mean velocity gradients in an otherwise two-dimensional boundary layer (BL). The stabilizing effect, associated with an extra turbulence production ...
Cambridge University Press2015Hydrodynamic loading of perforated disks in creeping flows
François Gallaire, Pedro Miguel Nunes Pereira de Almeida Reis, Lorenzo Siconolfi, Matteo Pezzulla
We present results from an experimental investigation of a viscous fluid driven through and around porous disks at low and moderate Reynolds number conditions: Re=O(10−4–10−3) and Re=O(1–10). Specifically, we quantify the hydrodynamic drag that these thin ...
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