52 citations · 207 across the 12 of their papers we have counts for
12 papers
The dynamical role of vortices in the two-dimensional inverse cascade of turbulence
V. J. Valadão, R. M. Pereira, L. Moriconi +1
We study the inverse energy cascade of two-dimensional turbulence by means of high-resolution numerical simulations forced at intermediate wavenumbers. To clarify the role of vorti…
Eddy-Viscous Modeling and the Topology of Extreme Circulation Events in Three-Dimensional Turbulence
G. B. Apolinário, L. Moriconi, R. M. Pereira +1
We discuss the role of particular velocity field configurations -- instantons, for short -- which are supposed to dominate the flow during the occurrence of extreme turbulent circu…
Circulation Statistics and the Mutually Excluding Behavior of Turbulent Vortex Structures
Luca Moriconi, Rodrigo M. Pereira, Victor J. Valadão
The small-scale statistical properties of velocity circulation in classical homogeneous and isotropic turbulent flows are assessed through a modeling framework that brings together…
Statistics of Extreme Turbulent Circulation Events from Multifractality Breaking
L. Moriconi, R. M. Pereira
Recent numerical explorations of extremely intense circulation fluctuations at high Reynolds number flows have brought to light novel aspects of turbulent intermittency. Vortex gas…
Adaptive solution of initial value problems by a dynamical Galerkin scheme
Rodrigo M. Pereira, Natacha Nguyen van yen, Kai Schneider +1
We study dynamical Galerkin schemes for evolutionary partial differential equations (PDEs), where the projection operator changes over time. When selecting a subset of basis functi…
Vortex Gas Modeling of Turbulent Circulation Statistics
G. B. Apolinário, L. Moriconi, R. M. Pereira +1
Statistical properties of circulation encode relevant information about the multi-scale structure of turbulent cascades. Recent massive computational efforts have posed challenging…
Instantons and Fluctuations in a Lagrangian Model of Turbulence
G. B. Apolinário, L. Moriconi, R. M. Pereira
We perform a detailed analytical study of the Recent Fluid Deformation (RFD) model for the onset of Lagrangian intermittency, within the context of the Martin-Siggia-Rose-Janssen-d…
A multifractal model for the velocity gradients dynamics in turbulent flows
Rodrigo M. Pereira, Luca Moriconi, Laurent Chevillard
We develop a stochastic model for the velocity gradients dynamics along a Lagrangian trajectory. Comparing with different attempts proposed in the literature, the present model, at…
Instantons in a Lagrangian model of turbulence
Leonardo S. Grigorio, Freddy Bouchet, Rodrigo M. Pereira +1
The role of instantons is investigated in the Lagrangian model for the velocity gradient evolution known as the Recent Fluid Deformation approximation. After recasting the model in…
A dissipative random velocity field for fully developed fluid turbulence
Rodrigo M. Pereira, Christophe Garban, Laurent Chevillard
We investigate the statistical properties, based on numerical simulations and analytical calculations, of a recently proposed stochastic model for the velocity field of an incompre…
Velocity-Gradient Probability Distribution Functions in a Lagrangian Model of Turbulence
L. Moriconi, R. M. Pereira, L. S. Grigorio
The Recent Fluid Deformation Closure (RFDC) model of lagrangian turbulence is recast in path-integral language within the framework of the Martin-Siggia-Rose functional formalism.…
Wavelet methods to eliminate resonances in the Galerkin-truncated Burgers and Euler equations
Rodrigo M. Pereira, Romain Nguyen-van-yen, Marie Farge +1
It is well known that solutions to the Fourier-Galerkin truncation of the inviscid Burgers equation (and other hyperbolic conservation laws) do not converge to the physically relev…