Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Chevillard, Laurent"'
Autor:
Beck, Geoffrey, Bréhier, Charles-Edouard, Chevillard, Laurent, Grande, Ricardo, Ruffenach, Wandrille
Publikováno v:
Phys. Rev. Research 6, 033048 (2024)
Motivated by the modeling of the spatial structure of the velocity field of three-dimensional turbulent flows, and the phenomenology of cascade phenomena, a linear dynamics has been recently proposed able to generate high velocity gradients from a sm
Externí odkaz:
http://arxiv.org/abs/2403.05401
Autor:
Viggiano, Bianca, Basset, Thomas, Bourgoin, Mickaël, Cal, Raúl Bayoán, Chevillard, Laurent, Meneveau, Charles, Volk, Romain
Turbulence is prevalent in nature and industry, from large-scale wave dynamics to small-scale combustion nozzle sprays. In addition to the multi-scale nonlinear complexity and both randomness and coherent structures in its dynamics, practical turbule
Externí odkaz:
http://arxiv.org/abs/2310.04330
Autor:
Apolinário, Gabriel B., Beck, Geoffrey, Chevillard, Laurent, Gallagher, Isabelle, Grande, Ricardo
Turbulent cascades characterize the transfer of energy injected by a random force at large scales towards the small scales. In hydrodynamic turbulence, when the Reynolds number is large, the velocity field of the fluid becomes irregular and the rate
Externí odkaz:
http://arxiv.org/abs/2301.00780
Publikováno v:
Mathematics in Engineering 5, 2:1-23 (2023)
A linear dynamical model for the development of the turbulent energy cascade was introduced in Apolin\'ario \emph{et al} (J. Stat. Phys. \textbf{186}, 15 (2022)). This partial differential equation, randomly stirred by a forcing term which is smooth
Externí odkaz:
http://arxiv.org/abs/2109.00489
Publikováno v:
J Stat Phys 186, 15 (2022)
Motivated by the modeling of three-dimensional fluid turbulence, we define and study a class of stochastic partial differential equations (SPDEs) that are randomly stirred by a spatially smooth and uncorrelated in time forcing term. To reproduce the
Externí odkaz:
http://arxiv.org/abs/2107.03309
Autor:
Viggiano, Bianca, Basset, Thomas, Solovitz, Stephen, Barois, Thomas, Gibert, Mathieu, Mordant, Nicolas, Chevillard, Laurent, Volk, Romain, Bourgoin, Mickael, Cal, Raul Bayoan
Publikováno v:
J. Fluid Mech. 918 (2021) A25
A Lagrangian experimental study of an axisymmetric turbulent water jet is performed to investigate the highly anisotropic and inhomogeneous flow field. The measurements were conducted within a Lagrangian exploration module, an icosahedron apparatus,
Externí odkaz:
http://arxiv.org/abs/2102.08333
The Ornstein-Uhlenbeck process can be seen as a paradigm of a finite-variance and statistically stationary rough random walk. Furthermore, it is defined as the unique solution of a Markovian stochastic dynamics and shares the same local regularity as
Externí odkaz:
http://arxiv.org/abs/2011.09503
Autor:
Reneuve, Jason, Chevillard, Laurent
Publikováno v:
Phys. Rev. Lett. 125, 014502 (2020)
We study the Lagrangian trajectories of statistically isotropic, homogeneous, and stationary divergence free spatiotemporal random vector fields. We design this advecting Eulerian velocity field such that it gets asymptotically rough and multifractal
Externí odkaz:
http://arxiv.org/abs/2004.02864
Autor:
Viggiano, Bianca, Friedrich, Jan, Volk, Romain, Bourgoin, Mickael, Cal, Raul Bayoan, Chevillard, Laurent
Publikováno v:
J. Fluid Mech.(2020),vol. 900, A27
We develop a stochastic model for Lagrangian velocity as it is observed in experimental and numerical fully developed turbulent flows. We define it as the unique statistically stationary solution of a causal dynamics, given by a stochastic differenti
Externí odkaz:
http://arxiv.org/abs/1909.09489
Publikováno v:
Phys. Rev. Fluids 3, 114602 (2018)
We study the reconnection of vortices in a quantum fluid with a roton minimum, by numerically solving the Gross-Pitaevskii (GP) equations. A non-local interaction potential is introduced to mimic the experimental dispersion relation of superfluid $^4
Externí odkaz:
http://arxiv.org/abs/1807.05791