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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 ...
SYNCHRONIZATION OF CHAOS AND THE TRANSITION TO WAVE TURBULENCE
(WORLD SCIENTIFIC PUBL CO PTE LTDSINGAPORE, 2012)
We investigated the transition to wave turbulence in a spatially extended three-wave interacting model, where a spatially homogeneous state undergoing chaotic dynamics undergoes spatial mode excitation. The transition to ...
Incompressible energy spectrum in atomic Bose-Einstein condensates: a weak wave turbulence theory approach
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Física - PPGFCâmpus São Carlos, 2022-08-25)
Bose-Einstein condensates with their superfluidity property provide an interesting parallel to classical fluids. Due to the Kolmogorov spectrum of homogeneous turbulence the statistics of the incompressible velocity field ...
Exact law for homogeneous compressible Hall magnetohydrodynamics turbulence
(American Physical Society, 2018-01)
We derive an exact law for three-dimensional (3D) homogeneous compressible isothermal Hall magnetohydrodynamic turbulence, without the assumption of isotropy. The Hall current is shown to introduce new flux and source terms ...
Simulations of turbulent channels with prescribed velocity profiles
(Cambridge University Press, 2013-05)
Direct numerical simulations of turbulent channels with artificially prescribed velocity profiles are discussed, using both natural and purposely incorrect profiles. It is found that turbulence develops correctly when ...
A multifractal model for the velocity gradient dynamics in turbulent ows
(Cambridge University PressBrasilNúcleo Interdisciplinar de Dinâmica dos Fluidos, 2019)
The spatio-temporal spectrum of turbulent flows
(Springer, 2015-12)
Identification and extraction of vortical structures and of waves in a disorganised flow is a mayor challenge in the study of turbulence. We present a study of the spatio-temporal behavior of turbulent flows in the presence ...
Alternative derivation of exact law for compressible and isothermal magnetohydrodynamics turbulence
(American Physical Society, 2017-11)
The exact law for fully developed homogeneous compressible magnetohydrodynamics (CMHD) turbulence is derived. For an isothermal plasma, without the assumption of isotropy, the exact law is expressed as a function of the ...
Statistics of incompressible hydrodynamic turbulence: An alternative approach
(American Physical Society, 2019-02)
Using a recent alternative form of the Kolmogorov-Monin exact relation for fully developed hydrodynamics (HD) turbulence, the incompressible energy cascade rate is computed. Under this current theoretical framework, for ...