Phase-Mean Drift Equation for Convection Patterns in Large Aspect Ratio Containers

  • A. C. Newell
  • T. Passot
  • M. Souli
Part of the NATO ASI Series book series (NSSB, volume 225)


We present the phase diffusion and mean drift equation which describe the convection pattern in large aspect ratio containers for arbitrary large Rayleigh numbers. An exact agreement is found with the borders of the Busse balloon, concerning the long wavelength instabilities. We propose a calculation of the selected wavenumber which agrees closely with experiments and we predict a new instability which appears to be important in initiating time dependence. We predict also the Rayleigh numbers at which loss of spatial correlation due to global defect nucleation will occur.


Prandtl Number Rayleigh Number Phase Equation Convection Pattern Circular Patch 
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Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • A. C. Newell
    • 1
  • T. Passot
    • 1
  • M. Souli
    • 1
  1. 1.Arizona Center for Mathematical SciencesThe University of ArizonaTucsonUSA

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