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Abstract:

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.

Registro:

Documento: Artículo
Título:Kelvin waves with helical Beltrami flow structure
Autor:González, R.; Sarasua, G.; Costa, A.
Filiación:Departamento de Física FCEyN, Universidad de Buenos Aires, Buenos Aires, Argentina
Instituto de Física, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
Instituto de Astronomía Teórica y Experimental, Córdoba, Argentina
Instituto de Astronomía y Física del Espacio, Buenos Aires, Argentina
Departamento de Desarrollo Humano, Universidad Nacional de General Sarmiento, Buenos Aires, Argentina
Palabras clave: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
Año:2008
Volumen:20
Número:2
DOI: http://dx.doi.org/10.1063/1.2840196
Título revista:Physics of Fluids
Título revista abreviado:Phys. Fluids
ISSN:10706631
CODEN:PHFLE
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_10706631_v20_n2_p_Gonzalez.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10706631_v20_n2_p_Gonzalez

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Citas:

---------- APA ----------
González, R., Sarasua, G. & Costa, A. (2008) . Kelvin waves with helical Beltrami flow structure. Physics of Fluids, 20(2).
http://dx.doi.org/10.1063/1.2840196
---------- CHICAGO ----------
González, R., Sarasua, G., Costa, A. "Kelvin waves with helical Beltrami flow structure" . Physics of Fluids 20, no. 2 (2008).
http://dx.doi.org/10.1063/1.2840196
---------- MLA ----------
González, R., Sarasua, G., Costa, A. "Kelvin waves with helical Beltrami flow structure" . Physics of Fluids, vol. 20, no. 2, 2008.
http://dx.doi.org/10.1063/1.2840196
---------- VANCOUVER ----------
González, R., Sarasua, G., Costa, A. Kelvin waves with helical Beltrami flow structure. Phys. Fluids. 2008;20(2).
http://dx.doi.org/10.1063/1.2840196