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Imazio, P.R.; Mininni, P.D. "Effective diffusivity of passive scalars in rotating turbulence" (2013) Physical Review E - Statistical, Nonlinear, and Soft Matter Physics. 87(2)
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Abstract:

We use direct numerical simulations to compute turbulent transport coefficients for passive scalars in turbulent rotating flows. Effective diffusion coefficients in the directions parallel and perpendicular to the rotation axis are obtained by studying the diffusion of an imposed initial profile for the passive scalar, and calculated by measuring the scalar average concentration and average spatial flux as a function of time. The Rossby and Schmidt numbers are varied to quantify their effect on the effective diffusion. It is found that rotation reduces scalar diffusivity in the perpendicular direction. The perpendicular diffusion can be estimated from mixing length arguments using the characteristic velocities and lengths perpendicular to the rotation axis. Deviations are observed for small Schmidt numbers, for which turbulent transport decreases and molecular diffusion becomes more significant. © 2013 American Physical Society.

Registro:

Documento: Artículo
Título:Effective diffusivity of passive scalars in rotating turbulence
Autor:Imazio, P.R.; Mininni, P.D.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Cuidad Universitaria, Buenos Aires 1428, Argentina
National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, United States
Palabras clave:Average concentration; Characteristic velocities; Effective diffusion; Effective diffusion coefficients; Effective diffusivities; Function of time; Mixing length; Molecular diffusion; Passive scalars; Perpendicular diffusion; Rotating flow; Rotating turbulence; Rotation axis; Schmidt numbers; Spatial fluxes; Turbulent transports; Mixed convection; Diffusion; article; computer simulation; diffusion; flow kinetics; methodology; nonlinear system; rotation; theoretical model; Computer Simulation; Diffusion; Models, Theoretical; Nonlinear Dynamics; Rheology; Rotation
Año:2013
Volumen:87
Número:2
DOI: http://dx.doi.org/10.1103/PhysRevE.87.023018
Título revista:Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Título revista abreviado:Phys. Rev. E Stat. Nonlinear Soft Matter Phys.
ISSN:15393755
CODEN:PLEEE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15393755_v87_n2_p_Imazio

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Citas:

---------- APA ----------
Imazio, P.R. & Mininni, P.D. (2013) . Effective diffusivity of passive scalars in rotating turbulence. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 87(2).
http://dx.doi.org/10.1103/PhysRevE.87.023018
---------- CHICAGO ----------
Imazio, P.R., Mininni, P.D. "Effective diffusivity of passive scalars in rotating turbulence" . Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 87, no. 2 (2013).
http://dx.doi.org/10.1103/PhysRevE.87.023018
---------- MLA ----------
Imazio, P.R., Mininni, P.D. "Effective diffusivity of passive scalars in rotating turbulence" . Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, vol. 87, no. 2, 2013.
http://dx.doi.org/10.1103/PhysRevE.87.023018
---------- VANCOUVER ----------
Imazio, P.R., Mininni, P.D. Effective diffusivity of passive scalars in rotating turbulence. Phys. Rev. E Stat. Nonlinear Soft Matter Phys. 2013;87(2).
http://dx.doi.org/10.1103/PhysRevE.87.023018