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Abstract:

We present models for single-particle dispersion in vertical and horizontal directions of stably stratified flows. The model in the vertical direction is based on the observed Lagrangian spectrum of the vertical velocity, while the model in the horizontal direction is a combination of a continuous-time eddy-constrained random walk process with a contribution to transport from horizontal winds. Transport at times larger than the Lagrangian turnover time is not universal and dependent on these winds. The models yield results in good agreement with direct numerical simulations of stratified turbulence, for which single-particle dispersion differs from the well-studied case of homogeneous and isotropic turbulence. © 2018 American Physical Society.

Registro:

Documento: Artículo
Título:Single-particle dispersion in stably stratified turbulence
Autor:Sujovolsky, N.E.; Mininni, P.D.; Rast, M.P.
Filiación:Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Física, IFIBA, CONICET, Ciudad Universitaria, Buenos Aires, 1428, Argentina
Department of Astrophysical and Planetary Sciences, Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80309, United States
Palabras clave:Continuous time systems; Lagrange multipliers; Turbulence; Homogeneous and isotropic turbulence; Horizontal winds; Random walk process; Single particle; Stratified flows; Stratified turbulence; Vertical direction; Vertical velocity; Dispersions
Año:2018
Volumen:3
Número:3
DOI: http://dx.doi.org/10.1103/PhysRevFluids.3.034603
Título revista:Physical Review Fluids
Título revista abreviado:Phys. Rev. Fluids
ISSN:2469990X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_2469990X_v3_n3_p_Sujovolsky

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Citas:

---------- APA ----------
Sujovolsky, N.E., Mininni, P.D. & Rast, M.P. (2018) . Single-particle dispersion in stably stratified turbulence. Physical Review Fluids, 3(3).
http://dx.doi.org/10.1103/PhysRevFluids.3.034603
---------- CHICAGO ----------
Sujovolsky, N.E., Mininni, P.D., Rast, M.P. "Single-particle dispersion in stably stratified turbulence" . Physical Review Fluids 3, no. 3 (2018).
http://dx.doi.org/10.1103/PhysRevFluids.3.034603
---------- MLA ----------
Sujovolsky, N.E., Mininni, P.D., Rast, M.P. "Single-particle dispersion in stably stratified turbulence" . Physical Review Fluids, vol. 3, no. 3, 2018.
http://dx.doi.org/10.1103/PhysRevFluids.3.034603
---------- VANCOUVER ----------
Sujovolsky, N.E., Mininni, P.D., Rast, M.P. Single-particle dispersion in stably stratified turbulence. Phys. Rev. Fluids. 2018;3(3).
http://dx.doi.org/10.1103/PhysRevFluids.3.034603