Rotating helical turbulence: Three-dimensionalization or self-similarity in the small scales?

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We present numerical evidence on how three-dimensionalization is recovered at small scale in rotating turbulence with helical forcing provided by a Beltrami flow. The relevant ranges (large-scale inverse cascade of energy, anisotropic and isotropic direct cascades of energy and helicity, dissipative...

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Autores principales: Pouquet, A., Baerenzung, J., Mininni, P.D., Rosenberg, D., Thalabard, S.
Formato: Documento de conferencia publishedVersion
Publicado: 2011
Materias:
Large eddy simulation
Numerical models
Conformal invariance
Dimensionalization
Helical turbulence
Laboratory experiments
Numerical evidence
Rotating turbulence
Scaling properties
Self-similarities
Turbulence
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17426588_v318_nSECTION4_p_Pouquet
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17426588_v318_nSECTION4_p_Pouquet_oai
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id I28-R145-paper_17426588_v318_nSECTION4_p_Pouquet_oai
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spelling I28-R145-paper_17426588_v318_nSECTION4_p_Pouquet_oai2024-08-16 Pouquet, A. Baerenzung, J. Mininni, P.D. Rosenberg, D. Thalabard, S. 2011 We present numerical evidence on how three-dimensionalization is recovered at small scale in rotating turbulence with helical forcing provided by a Beltrami flow. The relevant ranges (large-scale inverse cascade of energy, anisotropic and isotropic direct cascades of energy and helicity, dissipative) are each moderately resolved. These results stem from large direct numerical simulations on grids of either 15363 or 30723 points. In the latter case, the scale at which the inertial wave time and the eddy turn-over time are equal is found to be more than one order of magnitude larger than the dissipation scale. We also examine how the presence of such an intermediate scale could affect truncation due to the use of a helical spectral Large Eddy Simulation procedure which can allow for extending the analysis to a wider range of parameters. Finally, the self-similarity of the direct cascade of energy to small scales for rotating flows, observed recently in numerical simulations as well as in several laboratory experiments, will be discussed briefly for its scaling properties and its conformal invariance. Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_17426588_v318_nSECTION4_p_Pouquet info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar J. Phys. Conf. Ser. 2011;318(SECTION 4) Large eddy simulation Numerical models Conformal invariance Dimensionalization Helical turbulence Laboratory experiments Numerical evidence Rotating turbulence Scaling properties Self-similarities Turbulence Rotating helical turbulence: Three-dimensionalization or self-similarity in the small scales? info:eu-repo/semantics/conferenceObject info:ar-repo/semantics/documento de conferencia info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17426588_v318_nSECTION4_p_Pouquet_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Large eddy simulation
Numerical models
Conformal invariance
Dimensionalization
Helical turbulence
Laboratory experiments
Numerical evidence
Rotating turbulence
Scaling properties
Self-similarities
Turbulence
spellingShingle Large eddy simulation
Numerical models
Conformal invariance
Dimensionalization
Helical turbulence
Laboratory experiments
Numerical evidence
Rotating turbulence
Scaling properties
Self-similarities
Turbulence
Pouquet, A.
Baerenzung, J.
Mininni, P.D.
Rosenberg, D.
Thalabard, S.
Rotating helical turbulence: Three-dimensionalization or self-similarity in the small scales?
topic_facet Large eddy simulation
Numerical models
Conformal invariance
Dimensionalization
Helical turbulence
Laboratory experiments
Numerical evidence
Rotating turbulence
Scaling properties
Self-similarities
Turbulence
description We present numerical evidence on how three-dimensionalization is recovered at small scale in rotating turbulence with helical forcing provided by a Beltrami flow. The relevant ranges (large-scale inverse cascade of energy, anisotropic and isotropic direct cascades of energy and helicity, dissipative) are each moderately resolved. These results stem from large direct numerical simulations on grids of either 15363 or 30723 points. In the latter case, the scale at which the inertial wave time and the eddy turn-over time are equal is found to be more than one order of magnitude larger than the dissipation scale. We also examine how the presence of such an intermediate scale could affect truncation due to the use of a helical spectral Large Eddy Simulation procedure which can allow for extending the analysis to a wider range of parameters. Finally, the self-similarity of the direct cascade of energy to small scales for rotating flows, observed recently in numerical simulations as well as in several laboratory experiments, will be discussed briefly for its scaling properties and its conformal invariance.
format Documento de conferencia
Documento de conferencia
publishedVersion
author Pouquet, A.
Baerenzung, J.
Mininni, P.D.
Rosenberg, D.
Thalabard, S.
author_facet Pouquet, A.
Baerenzung, J.
Mininni, P.D.
Rosenberg, D.
Thalabard, S.
author_sort Pouquet, A.
title Rotating helical turbulence: Three-dimensionalization or self-similarity in the small scales?
title_short Rotating helical turbulence: Three-dimensionalization or self-similarity in the small scales?
title_full Rotating helical turbulence: Three-dimensionalization or self-similarity in the small scales?
title_fullStr Rotating helical turbulence: Three-dimensionalization or self-similarity in the small scales?
title_full_unstemmed Rotating helical turbulence: Three-dimensionalization or self-similarity in the small scales?
title_sort rotating helical turbulence: three-dimensionalization or self-similarity in the small scales?
publishDate 2011
url http://hdl.handle.net/20.500.12110/paper_17426588_v318_nSECTION4_p_Pouquet
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17426588_v318_nSECTION4_p_Pouquet_oai
work_keys_str_mv AT pouqueta rotatinghelicalturbulencethreedimensionalizationorselfsimilarityinthesmallscales
AT baerenzungj rotatinghelicalturbulencethreedimensionalizationorselfsimilarityinthesmallscales
AT mininnipd rotatinghelicalturbulencethreedimensionalizationorselfsimilarityinthesmallscales
AT rosenbergd rotatinghelicalturbulencethreedimensionalizationorselfsimilarityinthesmallscales
AT thalabards rotatinghelicalturbulencethreedimensionalizationorselfsimilarityinthesmallscales
_version_ 1809357240513069056

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