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Experimental study of forced stratified turbulence

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Abstract

Recent results have shown that strongly stratified turbulence has a three dimensional dynamic instead of a quasi-two dimensional dynamic conjectured previously. The structures are strongly anisotropic with an aspect ratio scaling like the Froude number [1]. A direct cascade of energy from large scales to small scales associated with a kh-5/3 horizontal kinetic energy spectrum has been predicted and observed in DNS of forced stratified turbulence when the buoyancy Reynolds number Rt is sufficiently large [2]. In constrast, for small Rt, the flow is dominated by vertical viscous effects even if the Reynolds number is large [3, 4].

Original languageEnglish
Title of host publicationAdvances in Turbulence XII - Proceedings of the 12th EUROMECH European Turbulence Conference, 2009
EditorsBruno Eckhardt
PublisherSpringer Science and Business Media Deutschland GmbH
Pages397-400
Number of pages4
ISBN (Print)9783642030840
DOIs
Publication statusPublished - 1 Jan 2009
Event12th EUROMECH European Turbulence Conference, ETC12 2009 - Marburg, Germany
Duration: 7 Sept 200910 Sept 2009

Publication series

NameSpringer Proceedings in Physics
Volume132
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Conference

Conference12th EUROMECH European Turbulence Conference, ETC12 2009
Country/TerritoryGermany
CityMarburg
Period7/09/0910/09/09

Keywords

  • Froude Number
  • Horizontal Velocity
  • Inertial Range
  • Reynolds Number
  • Vortex Pair

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