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Phys. Rev. Lett. 45, 634–637 (1980)

Forced Phase Diffusion in Rayleigh-Bénard Convection

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J. E. Wesfreid* and V. Croquette
Service de Physique du Solide et de Résonance Magnétique, Centré d'Etudes Nucléaires de Saclay, F-91190 Gif-sur-Yvette, France

Received 21 March 1980; published in the issue dated 25 August 1980

The first experimental evidence of the diffusive character of the phase variable which describes the position of the convective rolls is presented. To produce a phase modulation a small alternating flow in a slightly supercritical fluid layer is injected. With use of this method, the diffusion coefficient D concerning the propagation of phase disturbances parallel to the roll axis is measured.

© 1980 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.45.634
DOI:
10.1103/PhysRevLett.45.634
PACS:
47.25.Jn, 47.20.+m

*Present address: Ecole Supérieure de Physique et Chimie, 10 rue Vauquelin, F-75231 Paris 05, France.