Rotating helical turbulence. II. Intermittencyscale invarianceand structures

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We study the intermittency properties of the energy and helicity cascades in two 15363 direct numerical simulations of helical rotating turbulence. Symmetric and antisymmetric velocity increments are examinedas well as probability density functions of the velocity field and of the helicity density....

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Autores principales: Mininni, P.D., Pouquet, A.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2010
Materias:
Anti-symmetric
Different order
Helical turbulence
Helicities
Helicity cascades
Intermittency
Rotating turbulence
Scale invariant
Self-similarities
Small scale
Structure functions
Time-varying vortices
Velocity field
Velocity increments
Computer simulation
Rotation
Turbulence
Probability density function
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10706631_v22_n3_p6_Mininni
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paperaa:paper_10706631_v22_n3_p6_Mininni
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spelling paperaa:paper_10706631_v22_n3_p6_Mininni2023-06-12T16:49:25Z Rotating helical turbulence. II. Intermittencyscale invarianceand structures Phys. Fluids 2010;22(3):6-10 Mininni, P.D. Pouquet, A. Anti-symmetric Different order Helical turbulence Helicities Helicity cascades Intermittency Rotating turbulence Scale invariant Self-similarities Small scale Structure functions Time-varying vortices Velocity field Velocity increments Computer simulation Rotation Turbulence Probability density function We study the intermittency properties of the energy and helicity cascades in two 15363 direct numerical simulations of helical rotating turbulence. Symmetric and antisymmetric velocity increments are examinedas well as probability density functions of the velocity field and of the helicity density. It is found that the direct cascade of energy to small scales is scale invariant and nonintermittentwhereas the direct cascade of helicity is highly intermittent. Furthermorethe study of structure functions of different orders allows us to identify a recovery of isotropy of strong events at very small scales in the flow. Finallywe observe the juxtaposition in space of strong laminar and persistent helical columns next to time-varying vortex tanglesthe former being associated with the self-similarity of energy and the latter with the intermittency of helicity. © 2010 American Institute of Physics. Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10706631_v22_n3_p6_Mininni
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Anti-symmetric
Different order
Helical turbulence
Helicities
Helicity cascades
Intermittency
Rotating turbulence
Scale invariant
Self-similarities
Small scale
Structure functions
Time-varying vortices
Velocity field
Velocity increments
Computer simulation
Rotation
Turbulence
Probability density function
spellingShingle Anti-symmetric
Different order
Helical turbulence
Helicities
Helicity cascades
Intermittency
Rotating turbulence
Scale invariant
Self-similarities
Small scale
Structure functions
Time-varying vortices
Velocity field
Velocity increments
Computer simulation
Rotation
Turbulence
Probability density function
Mininni, P.D.
Pouquet, A.
Rotating helical turbulence. II. Intermittencyscale invarianceand structures
topic_facet Anti-symmetric
Different order
Helical turbulence
Helicities
Helicity cascades
Intermittency
Rotating turbulence
Scale invariant
Self-similarities
Small scale
Structure functions
Time-varying vortices
Velocity field
Velocity increments
Computer simulation
Rotation
Turbulence
Probability density function
description We study the intermittency properties of the energy and helicity cascades in two 15363 direct numerical simulations of helical rotating turbulence. Symmetric and antisymmetric velocity increments are examinedas well as probability density functions of the velocity field and of the helicity density. It is found that the direct cascade of energy to small scales is scale invariant and nonintermittentwhereas the direct cascade of helicity is highly intermittent. Furthermorethe study of structure functions of different orders allows us to identify a recovery of isotropy of strong events at very small scales in the flow. Finallywe observe the juxtaposition in space of strong laminar and persistent helical columns next to time-varying vortex tanglesthe former being associated with the self-similarity of energy and the latter with the intermittency of helicity. © 2010 American Institute of Physics.
format Artículo
Artículo
publishedVersion
author Mininni, P.D.
Pouquet, A.
author_facet Mininni, P.D.
Pouquet, A.
author_sort Mininni, P.D.
title Rotating helical turbulence. II. Intermittencyscale invarianceand structures
title_short Rotating helical turbulence. II. Intermittencyscale invarianceand structures
title_full Rotating helical turbulence. II. Intermittencyscale invarianceand structures
title_fullStr Rotating helical turbulence. II. Intermittencyscale invarianceand structures
title_full_unstemmed Rotating helical turbulence. II. Intermittencyscale invarianceand structures
title_sort rotating helical turbulence. ii. intermittencyscale invarianceand structures
publishDate 2010
url http://hdl.handle.net/20.500.12110/paper_10706631_v22_n3_p6_Mininni
work_keys_str_mv AT mininnipd rotatinghelicalturbulenceiiintermittencyscaleinvarianceandstructures
AT pouqueta rotatinghelicalturbulenceiiintermittencyscaleinvarianceandstructures
_version_ 1769810130477514752

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