Single-particle dispersion in stably stratified turbulence

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-t...

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Autores principales: Sujovolsky, N.E., Mininni, P.D., Rast, M.P.
Formato: JOUR
Materias:
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
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_2469990X_v3_n3_p_Sujovolsky
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_2469990X_v3_n3_p_Sujovolsky
record_format dspace
spelling todo:paper_2469990X_v3_n3_p_Sujovolsky2023-10-03T16:41:27Z Single-particle dispersion in stably stratified turbulence Sujovolsky, N.E. Mininni, P.D. Rast, M.P. 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 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_2469990X_v3_n3_p_Sujovolsky
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 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
spellingShingle 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
Sujovolsky, N.E.
Mininni, P.D.
Rast, M.P.
Single-particle dispersion in stably stratified turbulence
topic_facet 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
description 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.
format JOUR
author Sujovolsky, N.E.
Mininni, P.D.
Rast, M.P.
author_facet Sujovolsky, N.E.
Mininni, P.D.
Rast, M.P.
author_sort Sujovolsky, N.E.
title Single-particle dispersion in stably stratified turbulence
title_short Single-particle dispersion in stably stratified turbulence
title_full Single-particle dispersion in stably stratified turbulence
title_fullStr Single-particle dispersion in stably stratified turbulence
title_full_unstemmed Single-particle dispersion in stably stratified turbulence
title_sort single-particle dispersion in stably stratified turbulence
url http://hdl.handle.net/20.500.12110/paper_2469990X_v3_n3_p_Sujovolsky
work_keys_str_mv AT sujovolskyne singleparticledispersioninstablystratifiedturbulence
AT mininnipd singleparticledispersioninstablystratifiedturbulence
AT rastmp singleparticledispersioninstablystratifiedturbulence
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