Effect of Helicity and Rotation on the Free Decay of Turbulent Flows
The self-similar decay of energy in a turbulent flow is studied in direct numerical simulations with and without rotation. Two initial conditions are considered: one nonhelical (mirror symmetric) and one with maximal helicity. While in the absence of rotation the energy in the helical and nonhelical...
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2009
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v103_n1_p_Teitelbaum http://hdl.handle.net/20.500.12110/paper_00319007_v103_n1_p_Teitelbaum |
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paper:paper_00319007_v103_n1_p_Teitelbaum2023-06-08T14:57:50Z Effect of Helicity and Rotation on the Free Decay of Turbulent Flows Teitelbaum, Tomás Mininni, Pablo Daniel Decay rate Free decay Helicities Helicity cascades Initial conditions Rotating flow Self-similar Computer simulation languages Decay (organic) Turbulent flow Rotation The self-similar decay of energy in a turbulent flow is studied in direct numerical simulations with and without rotation. Two initial conditions are considered: one nonhelical (mirror symmetric) and one with maximal helicity. While in the absence of rotation the energy in the helical and nonhelical cases decays with the same rate, in rotating flows the helicity content has a major impact on the decay rate. These differences are associated with differences in the energy and helicity cascades when rotation is present. The properties of the structures in the flow at late times are also discussed. © 2009 The American Physical Society. Fil:Teitelbaum, T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v103_n1_p_Teitelbaum http://hdl.handle.net/20.500.12110/paper_00319007_v103_n1_p_Teitelbaum |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Decay rate Free decay Helicities Helicity cascades Initial conditions Rotating flow Self-similar Computer simulation languages Decay (organic) Turbulent flow Rotation |
spellingShingle |
Decay rate Free decay Helicities Helicity cascades Initial conditions Rotating flow Self-similar Computer simulation languages Decay (organic) Turbulent flow Rotation Teitelbaum, Tomás Mininni, Pablo Daniel Effect of Helicity and Rotation on the Free Decay of Turbulent Flows |
topic_facet |
Decay rate Free decay Helicities Helicity cascades Initial conditions Rotating flow Self-similar Computer simulation languages Decay (organic) Turbulent flow Rotation |
description |
The self-similar decay of energy in a turbulent flow is studied in direct numerical simulations with and without rotation. Two initial conditions are considered: one nonhelical (mirror symmetric) and one with maximal helicity. While in the absence of rotation the energy in the helical and nonhelical cases decays with the same rate, in rotating flows the helicity content has a major impact on the decay rate. These differences are associated with differences in the energy and helicity cascades when rotation is present. The properties of the structures in the flow at late times are also discussed. © 2009 The American Physical Society. |
author |
Teitelbaum, Tomás Mininni, Pablo Daniel |
author_facet |
Teitelbaum, Tomás Mininni, Pablo Daniel |
author_sort |
Teitelbaum, Tomás |
title |
Effect of Helicity and Rotation on the Free Decay of Turbulent Flows |
title_short |
Effect of Helicity and Rotation on the Free Decay of Turbulent Flows |
title_full |
Effect of Helicity and Rotation on the Free Decay of Turbulent Flows |
title_fullStr |
Effect of Helicity and Rotation on the Free Decay of Turbulent Flows |
title_full_unstemmed |
Effect of Helicity and Rotation on the Free Decay of Turbulent Flows |
title_sort |
effect of helicity and rotation on the free decay of turbulent flows |
publishDate |
2009 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v103_n1_p_Teitelbaum http://hdl.handle.net/20.500.12110/paper_00319007_v103_n1_p_Teitelbaum |
work_keys_str_mv |
AT teitelbaumtomas effectofhelicityandrotationonthefreedecayofturbulentflows AT mininnipablodaniel effectofhelicityandrotationonthefreedecayofturbulentflows |
_version_ |
1768544811468455936 |