dor_id: 4107267

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336.#.#.a: Artículo

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100.1.#.a: Ruiz Chavarría, G.; López Sánchez, E. J.

524.#.#.a: Ruiz Chavarría, G., et al. (2017). Formation and interaction of multiple dipoles in a periodic driving flow. Revista Mexicana de Física; Vol 63, No 4 Jul-Aug: 386-0. Recuperado de https://repositorio.unam.mx/contenidos/4107267

245.1.0.a: Formation and interaction of multiple dipoles in a periodic driving flow

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Facultad de Ciencias, UNAM

264.#.0.c: 2017

264.#.1.c: 2017-01-01

653.#.#.a: Tidal induced flow; vorticity; coalescence of vortices

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041.#.7.h: eng

520.3.#.a: We present herein the results of a numerical simulation of a periodic flow which take place in a channel and an open domain. To investigate this flow we solve the fluid dynamics equations in the vorticity-stream function formulation by using a pseudospectral method based on Chebyshev polynomials. According to these numerical simulations, a pair of counter-rotating vortices (known as a dipole) forms during each period. The lifetime of these vortices can exceed the driving period, which allows multiple dipoles to coexist. The attention is focused on the interaction of vortices. A possible outcome is that dipoles created in consecutive periods coalesce. Another outcome is the formation of vorticity spots in front of the emerging dipole which reduce the dipole speed. On the other hand, it is observed that a fraction of the vorticity created into the channel cannot incorporate to the vortices, leading to the formation of a vorticity band between the channel mouth and the dipole. Based on this fact an analytical model is proposed to describe the properties of dipoles emerging from the channel; the results of this model are consistent with numerical data. The parameters governing the develo±ent of this flow are the Strouhal number, whose value determines the intensity of the dipole interaction, and the Reynolds number, whose growth leads to the emergence of instabilities and to the breaking of the flow symmetries.

773.1.#.t: Revista Mexicana de Física; Vol 63, No 4 Jul-Aug (2017): 386-0

773.1.#.o: https://rmf.smf.mx/ojs/rmf/index

046.#.#.j: 2020-11-25 00:00:00.000000

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handle: 00d1370138f9ad56

harvesting_date: 2020-09-23 00:00:00.0

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last_modified: 2020-11-27 00:00:00

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license_type: by-nc-nd

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Artículo

Formation and interaction of multiple dipoles in a periodic driving flow

Ruiz Chavarría, G.; López Sánchez, E. J.

Facultad de Ciencias, UNAM, publicado en Revista Mexicana de Física, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Facultad de Ciencias, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Ruiz Chavarría, G., et al. (2017). Formation and interaction of multiple dipoles in a periodic driving flow. Revista Mexicana de Física; Vol 63, No 4 Jul-Aug: 386-0. Recuperado de https://repositorio.unam.mx/contenidos/4107267

Descripción del recurso

Autor(es)
Ruiz Chavarría, G.; López Sánchez, E. J.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Formation and interaction of multiple dipoles in a periodic driving flow
Fecha
2017-01-01
Resumen
We present herein the results of a numerical simulation of a periodic flow which take place in a channel and an open domain. To investigate this flow we solve the fluid dynamics equations in the vorticity-stream function formulation by using a pseudospectral method based on Chebyshev polynomials. According to these numerical simulations, a pair of counter-rotating vortices (known as a dipole) forms during each period. The lifetime of these vortices can exceed the driving period, which allows multiple dipoles to coexist. The attention is focused on the interaction of vortices. A possible outcome is that dipoles created in consecutive periods coalesce. Another outcome is the formation of vorticity spots in front of the emerging dipole which reduce the dipole speed. On the other hand, it is observed that a fraction of the vorticity created into the channel cannot incorporate to the vortices, leading to the formation of a vorticity band between the channel mouth and the dipole. Based on this fact an analytical model is proposed to describe the properties of dipoles emerging from the channel; the results of this model are consistent with numerical data. The parameters governing the develo±ent of this flow are the Strouhal number, whose value determines the intensity of the dipole interaction, and the Reynolds number, whose growth leads to the emergence of instabilities and to the breaking of the flow symmetries.
Tema
Tidal induced flow; vorticity; coalescence of vortices
Idioma
eng
ISSN
2683-2224 (digital); 0035-001X (impresa)

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