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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Autores principales: Teitelbaum, T., Mininni, P.D.
Formato: JOUR
Materias:
Decay rate
Free decay
Helicities
Helicity cascades
Initial conditions
Rotating flow
Self-similar
Computer simulation languages
Decay (organic)
Turbulent flow
Rotation
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00319007_v103_n1_p_Teitelbaum
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00319007_v103_n1_p_Teitelbaum
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spelling todo:paper_00319007_v103_n1_p_Teitelbaum2023-10-03T14:42:04Z Effect of Helicity and Rotation on the Free Decay of Turbulent Flows Teitelbaum, T. Mininni, P.D. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, T.
Mininni, P.D.
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.
format JOUR
author Teitelbaum, T.
Mininni, P.D.
author_facet Teitelbaum, T.
Mininni, P.D.
author_sort Teitelbaum, T.
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
url http://hdl.handle.net/20.500.12110/paper_00319007_v103_n1_p_Teitelbaum
work_keys_str_mv AT teitelbaumt effectofhelicityandrotationonthefreedecayofturbulentflows
AT mininnipd effectofhelicityandrotationonthefreedecayofturbulentflows
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