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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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Volume 10, issue 3
Nonlin. Processes Geophys., 10, 275–280, 2003
https://doi.org/10.5194/npg-10-275-2003
© Author(s) 2003. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Special issue: Geophysical Experiments

Nonlin. Processes Geophys., 10, 275–280, 2003
https://doi.org/10.5194/npg-10-275-2003
© Author(s) 2003. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  30 Jun 2003

30 Jun 2003

Centrifugally driven convection in the rotating cylindrical annulus with modulated boundaries

M. Westerburg and F. H. Busse M. Westerburg and F. H. Busse
  • Institute of Physics, University of Bayreuth, D-95440 Bayreuth, Germany

Abstract. The effect of sinusoidally modulated conical end boundaries on convection in a rotating cylindrical annulus is investigated theoretically and experimentally. A quasiperiodic time dependence of convection in the form of thermal Rossby waves is found and semi-quantitative agreement between theory and measurements can be established. The results are relevant to convection in the Earth's outer core close to the tangent cylinder touching the inner core at its equator.

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