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Oscillatory instabilities produced by heat from a temperature-controlled hot wire below an interface

Published online by Cambridge University Press:  26 April 2006

C. Rozé
Affiliation:
Laboratoire d'Energétique des Systèmes et Procédés, URA CNRS no. 230, INSA de Rouen, BP 08-76131-Mont Saint Aignan Cedex, France
G. Gouesbet
Affiliation:
Laboratoire d'Energétique des Systèmes et Procédés, URA CNRS no. 230, INSA de Rouen, BP 08-76131-Mont Saint Aignan Cedex, France
R. Darrigo
Affiliation:
Laboratoire d'Energétique des Systèmes et Procédés, URA CNRS no. 230, INSA de Rouen, BP 08-76131-Mont Saint Aignan Cedex, France

Abstract

New experimental results are reported for the motion of a liquid surface caused by the heat released from a hot wire below the surface. Starting from a base state with steady convection and steady deformation of the free surface caused by variations in surface tension and heat transport to the surface, the system loses its stability through a supercritical Hopf bifurcation occurring on a curve fT*, d) = 0 in which d is the distance between hot wire and surface and ΔT* a critical temperature difference. These experiments are a model for more complex laser heating experiments in which chaotic motions may occur. Some emphasis is placed on the characterization of propagating waves produced on the surface after the occurrence of the bifurcation.

Type
Research Article
Copyright
© 1993 Cambridge University Press

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