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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Autor principal:	Mininni, Pablo Daniel
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:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10706631_v22_n3_p5_Mininni http://hdl.handle.net/20.500.12110/paper_10706631_v22_n3_p5_Mininni
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10706631_v22_n3_p5_Mininni
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spelling	paper:paper_10706631_v22_n3_p5_Mininni2023-06-08T16:04:31Z Rotating helical turbulence. I. Global evolution and spectral behavior Mininni, Pablo Daniel 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 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. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10706631_v22_n3_p5_Mininni http://hdl.handle.net/20.500.12110/paper_10706631_v22_n3_p5_Mininni
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (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, Pablo Daniel 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.
author	Mininni, Pablo Daniel
author_facet	Mininni, Pablo Daniel
author_sort	Mininni, Pablo Daniel
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	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10706631_v22_n3_p5_Mininni http://hdl.handle.net/20.500.12110/paper_10706631_v22_n3_p5_Mininni
work_keys_str_mv	AT mininnipablodaniel rotatinghelicalturbulenceiglobalevolutionandspectralbehavior
_version_	1768542561854554112

Rotating helical turbulence. I. Global evolution and spectral behavior

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