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Abstract:

We study how helicity affects the spectrum of a passive scalar in rotating turbulent flows, using numerical simulations of turbulent flows with or without rotation and with or without injection of helicity. Scaling laws for energy and passive scalar spectra in the direction perpendicular to the rotation axis differ in rotating helical flows from those found in the non-helical case, with the spectrum of passive scalar variance in the former case being shallower than in the latter. A simple phenomenological model that links the effects of helicity on the energy spectrum with the passive scalar spectrum is presented. © 2013 The Royal Swedish Academy of Sciences.

Registro:

Documento: Artículo
Título:Passive scalar cascades in rotating helical and non-helical flows
Autor:Rodriguez Imazio, P.; Mininni, P.D.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428 Buenos Aires, Argentina
NCAR, PO Box 3000, Boulder, CO 80307-3000, United States
Palabras clave:Energy spectra; Helical flows; Helicities; Passive scalars; Phenomenological models; Rotation axis; Phenomenological modeling; Molecular physics; Physics; Mixing; Shock tubes; Turbulent flow
Año:2013
Volumen:88
Número:T155
DOI: http://dx.doi.org/10.1088/0031-8949/2013/T155/014037
Título revista:Physica Scripta
Título revista abreviado:Phys Scr
ISSN:00318949
CODEN:PHSTB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318949_v88_nT155_p_RodriguezImazio

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Citas:

---------- APA ----------
Rodriguez Imazio, P. & Mininni, P.D. (2013) . Passive scalar cascades in rotating helical and non-helical flows. Physica Scripta, 88(T155).
http://dx.doi.org/10.1088/0031-8949/2013/T155/014037
---------- CHICAGO ----------
Rodriguez Imazio, P., Mininni, P.D. "Passive scalar cascades in rotating helical and non-helical flows" . Physica Scripta 88, no. T155 (2013).
http://dx.doi.org/10.1088/0031-8949/2013/T155/014037
---------- MLA ----------
Rodriguez Imazio, P., Mininni, P.D. "Passive scalar cascades in rotating helical and non-helical flows" . Physica Scripta, vol. 88, no. T155, 2013.
http://dx.doi.org/10.1088/0031-8949/2013/T155/014037
---------- VANCOUVER ----------
Rodriguez Imazio, P., Mininni, P.D. Passive scalar cascades in rotating helical and non-helical flows. Phys Scr. 2013;88(T155).
http://dx.doi.org/10.1088/0031-8949/2013/T155/014037