Kelvin waves with helical Beltrami flow structure
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. T...
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Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_10706631_v20_n2_p_Gonzalez |
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paperaa:paper_10706631_v20_n2_p_Gonzalez2023-06-12T16:49:23Z Kelvin waves with helical Beltrami flow structure Phys. Fluids 2008;20(2) González, R. Sarasua, G. Costa, A. 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 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. 2008 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10706631_v20_n2_p_Gonzalez |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
language |
Inglés |
orig_language_str_mv |
eng |
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 |
spellingShingle |
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 González, R. Sarasua, G. Costa, A. Kelvin waves with helical Beltrami flow structure |
topic_facet |
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 |
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. |
format |
Artículo Artículo publishedVersion |
author |
González, R. Sarasua, G. Costa, A. |
author_facet |
González, R. Sarasua, G. Costa, A. |
author_sort |
González, R. |
title |
Kelvin waves with helical Beltrami flow structure |
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 |
publishDate |
2008 |
url |
http://hdl.handle.net/20.500.12110/paper_10706631_v20_n2_p_Gonzalez |
work_keys_str_mv |
AT gonzalezr kelvinwaveswithhelicalbeltramiflowstructure AT sarasuag kelvinwaveswithhelicalbeltramiflowstructure AT costaa kelvinwaveswithhelicalbeltramiflowstructure |
_version_ |
1769810242016641024 |