Kelvin waves with helical Beltrami flow structure

Autores
González, R.; Sarasua, G.; Costa, A.
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work we show that when an inviscid axisymmetric Rankine flow experiences a soft expansion, rotating Kelvin waves can be excited. Downstream of the region where the expansion occurs (the transition region) the resulting flow can be expressed as the addition of a Rankine and a Beltrami flow. The Beltrami constant is determined from the Rankine upstream flow, and the helix pitch of the n=1 mode results from the boundary conditions downstream. Finally, a discussion of the process leading to oscillatory flow and a conjecture about the topological background that sustains the Beltrami flow structure are offered. © 2008 American Institute of Physics.
Fil:González, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Phys. Fluids 2008;20(2)
Materia
Boundary conditions
Flow structure
Rotational flow
Beltrami constant
Beltrami flow
Kelvin wave
Oscillatory flow
Rankine flow
Fluid dynamics
Boundary conditions
Flow structure
Fluid dynamics
Rotational flow
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_10706631_v20_n2_p_Gonzalez
Acceder
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oai_identifier_str paperaa:paper_10706631_v20_n2_p_Gonzalez
network_acronym_str BDUBAFCEN
repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling Kelvin waves with helical Beltrami flow structureGonzález, R.Sarasua, G.Costa, A.Boundary conditionsFlow structureRotational flowBeltrami constantBeltrami flowKelvin waveOscillatory flowRankine flowFluid dynamicsBoundary conditionsFlow structureFluid dynamicsRotational flowIn this work we show that when an inviscid axisymmetric Rankine flow experiences a soft expansion, rotating Kelvin waves can be excited. Downstream of the region where the expansion occurs (the transition region) the resulting flow can be expressed as the addition of a Rankine and a Beltrami flow. The Beltrami constant is determined from the Rankine upstream flow, and the helix pitch of the n=1 mode results from the boundary conditions downstream. Finally, a discussion of the process leading to oscillatory flow and a conjecture about the topological background that sustains the Beltrami flow structure are offered. © 2008 American Institute of Physics.Fil:González, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2008info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_10706631_v20_n2_p_GonzalezPhys. Fluids 2008;20(2)reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-09-04T09:48:37Zpaperaa:paper_10706631_v20_n2_p_GonzalezInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-04 09:48:38.924Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Kelvin waves with helical Beltrami flow structure
title Kelvin waves with helical Beltrami flow structure
spellingShingle Kelvin waves with helical Beltrami flow structure
González, R.
Boundary conditions
Flow structure
Rotational flow
Beltrami constant
Beltrami flow
Kelvin wave
Oscillatory flow
Rankine flow
Fluid dynamics
Boundary conditions
Flow structure
Fluid dynamics
Rotational flow
title_short Kelvin waves with helical Beltrami flow structure
title_full Kelvin waves with helical Beltrami flow structure
title_fullStr Kelvin waves with helical Beltrami flow structure
title_full_unstemmed Kelvin waves with helical Beltrami flow structure
title_sort Kelvin waves with helical Beltrami flow structure
dc.creator.none.fl_str_mv González, R.
Sarasua, G.
Costa, A.
author González, R.
author_facet González, R.
Sarasua, G.
Costa, A.
author_role author
author2 Sarasua, G.
Costa, A.
author2_role author
author
dc.subject.none.fl_str_mv Boundary conditions
Flow structure
Rotational flow
Beltrami constant
Beltrami flow
Kelvin wave
Oscillatory flow
Rankine flow
Fluid dynamics
Boundary conditions
Flow structure
Fluid dynamics
Rotational flow
topic Boundary conditions
Flow structure
Rotational flow
Beltrami constant
Beltrami flow
Kelvin wave
Oscillatory flow
Rankine flow
Fluid dynamics
Boundary conditions
Flow structure
Fluid dynamics
Rotational flow
dc.description.none.fl_txt_mv In this work we show that when an inviscid axisymmetric Rankine flow experiences a soft expansion, rotating Kelvin waves can be excited. Downstream of the region where the expansion occurs (the transition region) the resulting flow can be expressed as the addition of a Rankine and a Beltrami flow. The Beltrami constant is determined from the Rankine upstream flow, and the helix pitch of the n=1 mode results from the boundary conditions downstream. Finally, a discussion of the process leading to oscillatory flow and a conjecture about the topological background that sustains the Beltrami flow structure are offered. © 2008 American Institute of Physics.
Fil:González, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description In this work we show that when an inviscid axisymmetric Rankine flow experiences a soft expansion, rotating Kelvin waves can be excited. Downstream of the region where the expansion occurs (the transition region) the resulting flow can be expressed as the addition of a Rankine and a Beltrami flow. The Beltrami constant is determined from the Rankine upstream flow, and the helix pitch of the n=1 mode results from the boundary conditions downstream. Finally, a discussion of the process leading to oscillatory flow and a conjecture about the topological background that sustains the Beltrami flow structure are offered. © 2008 American Institute of Physics.
publishDate 2008
dc.date.none.fl_str_mv 2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12110/paper_10706631_v20_n2_p_Gonzalez
url http://hdl.handle.net/20.500.12110/paper_10706631_v20_n2_p_Gonzalez
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Phys. Fluids 2008;20(2)
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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score 12.623145

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