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Intermittency in the isotropic component of helical and nonhelical turbulent flows
(American Physical Society, 2010-01)
We analyze the isotropic component of turbulent flows spanning a broad range or Reynolds numbers. The aim is to identify scaling laws and their Reynolds number dependence in flows under different mechanical forcings. To ...
Structures in magnetohydrodynamic turbulence: Detection and scaling
(American Physical Society, 2010-11)
We present a systematic analysis of statistical properties of turbulent current and vorticity structures at a given time using cluster analysis. The data stem from numerical simulations of decaying three-dimensional ...
High Reynolds number magnetohydrodynamic turbulence using a Lagrangian model
(American Physical Society, 2011-07)
With the help of a model of magnetohydrodynamic (MHD) turbulence tested previously, we explore high Reynolds number regimes up to equivalent resolutions of 60003 grid points in the absence of forcing and with no imposed ...
Nonlocal interactions in hydrodynamic turbulence at high Reynolds numbers: The slow emergence of scaling laws
(American Physical Society, 2008-12)
We analyze the data stemming from a forced incompressible hydrodynamic simulation on a grid of 20483 regularly spaced points, with a Taylor Reynolds number of Rλ ∼1300. The forcing is given by the Taylor-Green vortex, which ...
Helical turbulence prevails over inertial waves in forced rotating flows at high reynolds and low rossby numbers
(American Meteorological Society, 2011-10)
Astudy of spectral laws for helical turbulence in the presence of solid body rotation up to Reynolds numbers Re ~ 1 × 105 and down to Rossby numbers Ro ~ 3 × 10-3 is presented. The forcing function is a fully helical flow ...
The dynamics of unforced turbulence at high reynolds number for taylor-green vortices generalized to mhd
(Taylor & Francis Ltd, 2010-04)
We study decaying magnetohydrodynamics (MHD) turbulence stemming from the evolution of the Taylor-Green flow generalized recently to MHD, with equal viscosity and magnetic resistivity and up to equivalent grid resolutions ...
Simulation of two-dimensional high reynolds number wake flows with the use of filtered lagrangian navier-stokes equations
(2011)
This work presents a method for numerical simulation of viscous fluid flows based on the use of filtered Lagrangian Navier-Stokes equations. It is based on the hypothesis that the small scale motions are responsible for ...
Hysteretic gravity-wave bifurcation in a highly turbulent swirling flow
(CAMBRIDGE UNIV PRESS, 2006-03-25)
We report on experimental observations of a gravity-wave instability forced by a highly turbulent free-surface Taylor-Couette flow. Bistability and hysteresis are observed at the bifurcation from a turbulent base state, ...
A multifractal model for the velocity gradient dynamics in turbulent ows
(Cambridge University PressBrasilNúcleo Interdisciplinar de Dinâmica dos Fluidos, 2019)