High resolution DNS of shear-convective turbulence and its implications to second-order parameterization

K. L. Tse, Alex Mahalov, B. Nicolaenko, B. Joseph

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

High resolution 3D direct numerical simulation (DNS) of a model tropopause jet, with an underlying convectively unstable layer, is performed. We obtain quasi-equilibrium turbulent dataset, in which the budgets are nearly balanced. Vertical profiles of turbulence statistics and budgets are presented. Using this DNS dataset, we evaluate the performance of some popular models used in second-order closure of turbulence. To our knowledge, this is first time that such a study is conducted for turbulence under the combined influence of shear and convection. From this quasi-equilibrium dataset, we unambigously identify layers of countergradient momentum and heat fluxes which occur near regions of penetrative convection. These are also regions where conventional second-order closure models fail.

Original languageEnglish (US)
Title of host publicationProceedings of the 4th ASME/JSME Joint Fluids Engineering Conference
Subtitle of host publicationVolume 1, Part C, Forums
EditorsA. Ogut, Y. Tsuji, M. Kawahashi
PublisherAmerican Society of Mechanical Engineers
Pages1877-1885
Number of pages9
ISBN (Print)0791836967, 9780791836965
DOIs
StatePublished - Jan 1 2003
Event4th ASME/JSME Joint Fluids Engineering Conference - Honolulu, HI, United States
Duration: Jul 6 2003Jul 10 2003

Publication series

NameProceedings of the ASME/JSME Joint Fluids Engineering Conference
Volume1 C

Other

Other4th ASME/JSME Joint Fluids Engineering Conference
CountryUnited States
CityHonolulu, HI
Period7/6/037/10/03

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ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Tse, K. L., Mahalov, A., Nicolaenko, B., & Joseph, B. (2003). High resolution DNS of shear-convective turbulence and its implications to second-order parameterization. In A. Ogut, Y. Tsuji, & M. Kawahashi (Eds.), Proceedings of the 4th ASME/JSME Joint Fluids Engineering Conference: Volume 1, Part C, Forums (pp. 1877-1885). (Proceedings of the ASME/JSME Joint Fluids Engineering Conference; Vol. 1 C). American Society of Mechanical Engineers. https://doi.org/10.1115/fedsm2003-45333