Rotating helical turbulence. I. Global evolution and spectral behavior
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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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 |
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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 |
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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 |