Rotating helical turbulence. I. Global evolution and spectral behavior

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We present results from two 15363 direct numerical simulations of rotating turbulence where both energy and helicity are injected into the flow by an external forcing. The dual cascade of energy and helicity toward smaller scales observed in isotropic and homogeneous turbulence is broken in the pres...

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Autores principales:	Mininni, P.D., Pouquet, A.
Formato:	Artículo publishedVersion
Publicado:	2010
Materias:	External forcing Global quantities Helical turbulence Helicities Homogeneous turbulence Low Rossby number Lower resolution Reynolds Rossby numbers Rotating turbulence Spectral behaviors Computer simulation Turbulence Rotation
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_10706631_v22_n3_p5_Mininni http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_10706631_v22_n3_p5_Mininni_oai
Aporte de:	Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires

id	I28-R145-paper_10706631_v22_n3_p5_Mininni_oai
record_format	dspace
spelling	I28-R145-paper_10706631_v22_n3_p5_Mininni_oai2020-10-19 Mininni, P.D. Pouquet, A. 2010 We present results from two 15363 direct numerical simulations of rotating turbulence where both energy and helicity are injected into the flow by an external forcing. The dual cascade of energy and helicity toward smaller scales observed in isotropic and homogeneous turbulence is broken in the presence of rotation, with the development of an inverse cascade of energy now coexisting with direct cascades of energy and helicity. In the direct cascade range, the flux of helicity dominates over that of energy at low Rossby number. These cascades have several consequences for the statistics of the flow. The evolution of global quantities and of the energy and helicity spectra is studied, and comparisons with simulations at different Reynolds and Rossby numbers at lower resolution are done to identify scaling laws. © 2010 American Institute of Physics. 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_10706631_v22_n3_p5_Mininni info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Phys. Fluids 2010;22(3):5-9 External forcing Global quantities Helical turbulence Helicities Homogeneous turbulence Low Rossby number Lower resolution Reynolds Rossby numbers Rotating turbulence Spectral behaviors Computer simulation Turbulence Rotation Rotating helical turbulence. I. Global evolution and spectral behavior info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_10706631_v22_n3_p5_Mininni_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	External forcing Global quantities Helical turbulence Helicities Homogeneous turbulence Low Rossby number Lower resolution Reynolds Rossby numbers Rotating turbulence Spectral behaviors Computer simulation Turbulence Rotation
spellingShingle	External forcing Global quantities Helical turbulence Helicities Homogeneous turbulence Low Rossby number Lower resolution Reynolds Rossby numbers Rotating turbulence Spectral behaviors Computer simulation Turbulence Rotation Mininni, P.D. Pouquet, A. Rotating helical turbulence. I. Global evolution and spectral behavior
topic_facet	External forcing Global quantities Helical turbulence Helicities Homogeneous turbulence Low Rossby number Lower resolution Reynolds Rossby numbers Rotating turbulence Spectral behaviors Computer simulation Turbulence Rotation
description	We present results from two 15363 direct numerical simulations of rotating turbulence where both energy and helicity are injected into the flow by an external forcing. The dual cascade of energy and helicity toward smaller scales observed in isotropic and homogeneous turbulence is broken in the presence of rotation, with the development of an inverse cascade of energy now coexisting with direct cascades of energy and helicity. In the direct cascade range, the flux of helicity dominates over that of energy at low Rossby number. These cascades have several consequences for the statistics of the flow. The evolution of global quantities and of the energy and helicity spectra is studied, and comparisons with simulations at different Reynolds and Rossby numbers at lower resolution are done to identify scaling laws. © 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. I. Global evolution and spectral behavior
title_short	Rotating helical turbulence. I. Global evolution and spectral behavior
title_full	Rotating helical turbulence. I. Global evolution and spectral behavior
title_fullStr	Rotating helical turbulence. I. Global evolution and spectral behavior
title_full_unstemmed	Rotating helical turbulence. I. Global evolution and spectral behavior
title_sort	rotating helical turbulence. i. global evolution and spectral behavior
publishDate	2010
url	http://hdl.handle.net/20.500.12110/paper_10706631_v22_n3_p5_Mininni http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_10706631_v22_n3_p5_Mininni_oai
work_keys_str_mv	AT mininnipd rotatinghelicalturbulenceiglobalevolutionandspectralbehavior AT pouqueta rotatinghelicalturbulenceiglobalevolutionandspectralbehavior
_version_	1766026745274695680

Rotating helical turbulence. I. Global evolution and spectral behavior

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