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Numerical Simulations of Inhomogeneous Turbulence Generated by an Oscillating Grid and Submitted to Solid-Body Rotation

  • L. Lollini
  • C. Cambon
Conference paper
Part of the Fluid Mechanics and its Applications book series (FMIA, volume 36)

Abstract

An experiment made by Hopfinger et al., 1982 (hereafter referred to as HBG),shows how a turbulence,generated by an oscillating grid in a rotating tank, is affected by rotation for various values of the Rossby number. Near the grid,the Rossby number is set to a large value so that the flow is unaffected by rotation. An abrupt transition is located at a distance from the grid corresponding to a local Rossby number of about 0.20. Then, the flow, which becomes dominated by rotation, consists of concentrated vortices having axes of rotation approximately parallel to the rotation axis but a pure two-dimensional state is not reached. This kind of experiment is of great interest in geophysical applications because the transition between a three-dimensional small scale turbulence to a quasi two-dimensional one with larger characteristic scale is observed in atmospheric or oceanic flows, but not completely understood. Furthermore, it should lead us to a better understanding of cyclones genesis.

Keywords

Pseudo Spectral Method Large Characteristic Scale Internal Gravity Wave Rossby Number Grid Parameter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Cambon,C.,Mansour,N. N.,& Godeferd,F.S., 1995. Energy transfer in rotating turbulence.Submitted to J. Fluid Mech. Google Scholar
  2. Hopfinger,E.J.,Browand,F.K.,& Gagne,Y. 1982. Turbulence and waves in a rotating tank. Google Scholar
  3. Hopfinger ,E.J. & Toly,J.-A. 1976. Spatially decaying turbulence and its relation to mixing across density interfaces.J. Fluid Mech.,78:155–175.ADSCrossRefGoogle Scholar
  4. Yang,G. 1992.DNS of boundary forced turbulent flow in a non-rotating and a rotating system. Cornell University. Ph. D. Thesis dissertation.Google Scholar

Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • L. Lollini
    • 1
  • C. Cambon
    • 1
  1. 1.L.M.F.A. UMR 5509 CNRSEcole Centrale de LyonEcully CedexFrance

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