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Drifting Convection Rolls Induced by Spatial Modulation

  • G. Hartung
  • F. H. Busse
  • I. Rehberg
Part of the NATO ASI Series book series (NSSB, volume 225)

Abstract

A sinusoidal variation of the height of a convection channel gives rise to the onset of time dependent convection. The drift rate of the convection rolls is proportional to the amplitude of the modulation, to the sine of the phase difference between the modulation at the upper and lower boundary and to the amount of asymmetric properties of the convecting fluid such as the curvature in the temperature dependence of the density. These results have been obtained experimentally through the measurement of convection in an annular channel heated from below.

Keywords

Rayleigh Number Drift Rate Spatial Modulation Annular Channel Sinusoidal Modulation 
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.

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References

  1. Kelly, R.E., and Pal, D., 1978: Thermal Convection With Spatially Periodic Boundary Conditions: Resonant Wavelength Excitation, J. Fluid Mech. 86, 433–456MathSciNetADSMATHCrossRefGoogle Scholar
  2. Pal, D., and Kelly, R.E., 1978: Thermal Convection With Spatially Periodic Nonuniform Heating: Nonresonant Wavelength Excitation, pp. 235–238 in “Heat Transfer 1978” (Proc. Int. Heat Transfer Conf.), Vol. 2.Google Scholar

Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • G. Hartung
    • 1
  • F. H. Busse
    • 1
  • I. Rehberg
    • 1
  1. 1.Institute of PhysicsUniversity of BayreuthBayreuthGermany

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