Abstract:
The effect of helicity (velocity-vorticity correlations) is studied in direct numerical simulations of rotating turbulence down to Rossby numbers of 0.02. The results suggest that the presence of net helicity plays an important role in the dynamics of the flow. In particular, at small Rossby number, the energy cascades to large scales, as expected, but helicity then can dominate the cascade to small scales. A phenomenological interpretation in terms of a direct cascade of helicity slowed down by wave-eddy interactions leads to the prediction of non-Kolmogorovian inertial indices for the small-scale energy and helicity spectra. © 2009 The American Physical Society.
Registro:
Documento: |
Artículo
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Título: | Helicity cascades in rotating turbulence |
Autor: | Mininni, P.D.; Pouquet, A. |
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
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Palabras clave: | Direct numerical simulation; Turbulence; Energy cascades; Helicity; Helicity cascades; Phenomenological interpretations; Rossby numbers; Rotating turbulences; Rotation |
Año: | 2009
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Volumen: | 79
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Número: | 2
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DOI: |
http://dx.doi.org/10.1103/PhysRevE.79.026304 |
Título revista: | Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
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Título revista abreviado: | Phys. Rev. E Stat. Nonlinear Soft Matter Phys.
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ISSN: | 15393755
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CODEN: | PLEEE
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15393755_v79_n2_p_Mininni |
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Citas:
---------- APA ----------
Mininni, P.D. & Pouquet, A.
(2009)
. Helicity cascades in rotating turbulence. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 79(2).
http://dx.doi.org/10.1103/PhysRevE.79.026304---------- CHICAGO ----------
Mininni, P.D., Pouquet, A.
"Helicity cascades in rotating turbulence"
. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 79, no. 2
(2009).
http://dx.doi.org/10.1103/PhysRevE.79.026304---------- MLA ----------
Mininni, P.D., Pouquet, A.
"Helicity cascades in rotating turbulence"
. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, vol. 79, no. 2, 2009.
http://dx.doi.org/10.1103/PhysRevE.79.026304---------- VANCOUVER ----------
Mininni, P.D., Pouquet, A. Helicity cascades in rotating turbulence. Phys. Rev. E Stat. Nonlinear Soft Matter Phys. 2009;79(2).
http://dx.doi.org/10.1103/PhysRevE.79.026304