Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Lévêque, Emmanuel"'
Publikováno v:
Journal of Fluid Mechanics, 962, A22, 2023
The Hall-Vinen-Bekharevich-Khalatnikov (HVBK) model is widely used to numerically study quantum turbulence in superfluid helium. Based on the two-fluid model of Tisza and Landau, the HVBK model describes the normal (viscous) and superfluid (inviscid)
Externí odkaz:
http://arxiv.org/abs/2303.06631
Autor:
Sorriso-Valvo, Luca, Marino, Raffaele, Raffaello, Foldes, Lévêque, Emmanuel, D'Amicis, Raffaella, Bruno, Roberto, Telloni, Daniele, Yordanova, Emiliya
The linear scaling of the mixed third-order moment of the magnetohydrodynamic fluctuations is used to estimate the energy transfer rate of the turbulent cascade in the expanding solar wind. In 1976 the Helios 2 spacecraft measured three samples of fa
Externí odkaz:
http://arxiv.org/abs/2302.09064
Autor:
Foldes, Raffaello, Lévêque, Emmanuel, Marino, Raffaele, Pietropaolo, Ermanno, De Rosis, Alessandro, Telloni, Daniele, Feraco, Fabio
Simulating plasmas in the Hall-MagnetoHydroDynamics (Hall-MHD) regime represents a valuable {approach for the investigation of} complex non-linear dynamics developing in astrophysical {frameworks} and {fusion machines}. Taking into account the Hall e
Externí odkaz:
http://arxiv.org/abs/2212.11024
Autor:
Feraco, Fabio, Marino, Raffaele, Primavera, Leonardo, Pumir, Alain, Mininni, Pablo, Rosenberg, Duane, Pouquet, Annick, Foldes, Raffaello, Lévêque, Emmanuel, Camporeale, Enrico, Cerri, Silvio, Asokan, Harikrishnan Charuvil, Chau, Jorge, Bertoglio, Jean-Pierre, Salizzoni, Pietro, Marro, Massimo
Non-Gaussian statistics of large-scale fields are routinely observed in data from atmospheric and oceanic campaigns and global models. Recent direct numerical simulations (DNSs) showed that large-scale intermittency in stably stratified flows is due
Externí odkaz:
http://arxiv.org/abs/2106.07574
Publikováno v:
Journal of Fluid Mechanics, 895, A19 (2020)
This study investigates, by means of numerical simulations, extreme mechanical force exerted by a turbulent flow impinging on a bluff body, and examines the relevance of two distinct rare-event algorithms to efficiently sample these events. The drag
Externí odkaz:
http://arxiv.org/abs/2005.09323
Autor:
Sheikh, Muhammad Zubair, Gustavsson, Kristian, Lopez, Diego, Leveque, Emmanuel, Mehlig, Bernhard, Pumir, Alain, Naso, Aurore
Publikováno v:
J. Fluid Mech. 886 (2020) A9
How non-spherical particles orient as they settle in a flow has important practical implications in a number of scientific and engineering problems. In a quiescent fluid, a slowly settling particle orients so that it settles with its broad side first
Externí odkaz:
http://arxiv.org/abs/1904.07575
Publikováno v:
In Journal of Computational Physics 1 August 2022 462
Autor:
Leveque, Emmanuel, Naso, Aurore
Publikováno v:
Europhysics Letters 108 (2014) 54004
Based on geometric considerations, longitudinal and transverse Lagrangian velocity increments are introduced as components along, and perpendicular to, the displacement of fluid particles during a time scale {\tau}. It is argued that these two increm
Externí odkaz:
http://arxiv.org/abs/1409.3994
The use of simplified models of turbulent flows provides an appealing possibility to study the collision rate of turbulent suspensions, especially in conditions relevant to astrophysics, which require large time scale separations. To check the validi
Externí odkaz:
http://arxiv.org/abs/1402.5915
In turbulent suspensions, collision rates determine how rapidly particles coalesce or react with each other. To determine the collision rate, many numerical studies rely on the 'Ghost Collision Approximation' (GCA), which simply records how often pai
Externí odkaz:
http://arxiv.org/abs/1310.1521