Turbulent flow over a wavy surface: Stratified case

Ronald J. Calhoun, Robert L. Street, Jeffrey R. Koseff

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Stably stratified turbulent flow over wavy terrain is investigated using large-eddy simulation for laboratory-scale domains. Basic near-wall turbulence structure and production mechanisms appear similar to the neutral case, though dampened. The state of turbulence in the stratified fluid is analyzed by graphing the relationships between key nondimensional parameters. A shifting and smearing of the curve of flux Richardson number Rif versus turbulent Froude number Frt caused by the wavy boundary (compared with a flat boundary) demonstrates the higher level of turbulence near the wavy wall and shows strong mixing in the detached shear layer over the trough. The relationship describing the state of turbulence in a stratifed fluid given by Ivey and Imberger [1991] is approximately satisfied. Conditional sampling is used to analyze the nature of Reynolds stress events.

Original languageEnglish (US)
Article number2001JC900002
Pages (from-to)9295-9310
Number of pages16
JournalJournal of Geophysical Research: Oceans
Issue numberC5
StatePublished - May 15 2001
Externally publishedYes

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography


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