Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Cobelli, Pablo"'
Autor:
Angriman, Sofía, Smith, Sarah E., di Leoni, Patricio Clark, Cobelli, Pablo J., Mininni, Pablo D., Obligado, Martín
Active grids operated with random protocols are a standard way to generate large Reynolds number turbulence in wind and water tunnels. But anomalies in the decay and third-order scaling of active-grid turbulence have been reported. We combine Laser D
Externí odkaz:
http://arxiv.org/abs/2409.03919
Autor:
Zapata, Florencia, Angriman, Sofía, Ferran, Amélie, Cobelli, Pablo J., Obligado, Martin, Mininni, Pablo D.
We show that the unsteadiness of turbulence has a drastic effect on turbulence parameters and in particle cluster formation. To this end we use direct numerical simulations of particle laden flows with a steady forcing that generates an unsteady larg
Externí odkaz:
http://arxiv.org/abs/2402.15015
We report the experimental discovery of propagating trains of localized structures -- oscillons -- on top of Faraday waves in a vertically-vibrated fluid layer confined in a thin annular cell. These structures emerge spontaneously beyond a threshold
Externí odkaz:
http://arxiv.org/abs/2311.11186
When modelling turbulent flows, it is often the case that information on the forcing terms or the boundary conditions is either not available or overly complicated and expensive to implement. Instead, some flow features, such as the mean velocity pro
Externí odkaz:
http://arxiv.org/abs/2209.04285
Autor:
Angriman, Sofía, Ferran, Amélie, Zapata, Florencia, Cobelli, Pablo J., Obligado, Martin, Mininni, Pablo D.
We study the three-dimensional clustering of velocity stagnation points, of nulls of the vorticity and of the Lagrangian acceleration, and of inertial particles in turbulent flows at fixed Reynolds numbers, but under different large-scale flow geomet
Externí odkaz:
http://arxiv.org/abs/2203.10195
We define and characterize multi-time Lagrangian structure functions using data stemming from two swirling flows with mean flow and turbulent fluctuations: A Taylor-Green numerical flow, and a von K\'arm\'an laboratory experiment. Data is obtained fr
Externí odkaz:
http://arxiv.org/abs/2201.05251
Autor:
Angriman, Sofía, Cobelli, Pablo J., Bourgoin, Mickaël, Huisman, Sander G., Volk, Romain, Mininni, Pablo D.
Topological properties of physical systems play a crucial role in our understanding of nature, yet their experimental determination remains elusive. We show that the mean helicity, a dynamical invariant in ideal flows, quantitatively affects trajecto
Externí odkaz:
http://arxiv.org/abs/2111.07025
Autor:
Cabrera, Facundo, Cobelli, Pablo J.
The design and application of an instrumented particle for the lagrangian characterization of turbulent free surface flows is presented in this study. This instrumented particle constitutes a local measurement device capable of measuring both its ins
Externí odkaz:
http://arxiv.org/abs/2101.01482
Publikováno v:
Phys. Rev. Fluids 5, 064605 (2020)
We present a comparison of different particles' velocity and acceleration statistics in two paradigmatic turbulent swirling flows: the von K\'arm\'an flow in a laboratory experiment, and the Taylor-Green flow in direct numerical simulations. Tracers,
Externí odkaz:
http://arxiv.org/abs/1912.07581
Autor:
Del Grosso, Nicolás F., Cappelletti, Lucía M., Sujovolsky, Nicolás E., Mininni, Pablo D., Cobelli, Pablo J.
Publikováno v:
Phys.Rev.Fluids:4.074805, 2019
We present laboratory experiments of surface wave turbulence excited by paddles in the deep water regime. The free surface is seeded with buoyant particles that are advected and dispersed by the flow. Positions and velocities of the floaters are meas
Externí odkaz:
http://arxiv.org/abs/1901.09991