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Abstract:

The self-similar decay of energy in a turbulent flow is studied in direct numerical simulations with and without rotation. Two initial conditions are considered: one nonhelical (mirror symmetric) and one with maximal helicity. While in the absence of rotation the energy in the helical and nonhelical cases decays with the same rate, in rotating flows the helicity content has a major impact on the decay rate. These differences are associated with differences in the energy and helicity cascades when rotation is present. The properties of the structures in the flow at late times are also discussed. © 2009 The American Physical Society.

Registro:

Documento: Artículo
Título:Effect of Helicity and Rotation on the Free Decay of Turbulent Flows
Autor:Teitelbaum, T.; Mininni, P.D.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428 Buenos Aires, Argentina
NCAR, P.O. Box 3000, Boulder, CO 80307-3000, United States
Palabras clave:Decay rate; Free decay; Helicities; Helicity cascades; Initial conditions; Rotating flow; Self-similar; Computer simulation languages; Decay (organic); Turbulent flow; Rotation
Año:2009
Volumen:103
Número:1
DOI: http://dx.doi.org/10.1103/PhysRevLett.103.014501
Título revista:Physical Review Letters
Título revista abreviado:Phys Rev Lett
ISSN:00319007
CODEN:PRLTA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v103_n1_p_Teitelbaum

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Citas:

---------- APA ----------
Teitelbaum, T. & Mininni, P.D. (2009) . Effect of Helicity and Rotation on the Free Decay of Turbulent Flows. Physical Review Letters, 103(1).
http://dx.doi.org/10.1103/PhysRevLett.103.014501
---------- CHICAGO ----------
Teitelbaum, T., Mininni, P.D. "Effect of Helicity and Rotation on the Free Decay of Turbulent Flows" . Physical Review Letters 103, no. 1 (2009).
http://dx.doi.org/10.1103/PhysRevLett.103.014501
---------- MLA ----------
Teitelbaum, T., Mininni, P.D. "Effect of Helicity and Rotation on the Free Decay of Turbulent Flows" . Physical Review Letters, vol. 103, no. 1, 2009.
http://dx.doi.org/10.1103/PhysRevLett.103.014501
---------- VANCOUVER ----------
Teitelbaum, T., Mininni, P.D. Effect of Helicity and Rotation on the Free Decay of Turbulent Flows. Phys Rev Lett. 2009;103(1).
http://dx.doi.org/10.1103/PhysRevLett.103.014501