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Surface-tension-driven Bénard convention at infinite Prandtl number

Published online by Cambridge University Press:  26 April 2006

A. Thess  and
S. A. Orszag
A. Thess
Affiliation:
Program in Applied and Computational Mathematics, Princeton University, Princeton NJ, 08544, USA Permanent address and address for correspondence: Forschungszentrum Rossendorf, Postfach 510119, 01314 Dresden, Germany. Internet: [email protected].
S. A. Orszag
Affiliation:
Program in Applied and Computational Mathematics, Princeton University, Princeton NJ, 08544, USA
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Abstract

Surface-tension-driven convection in a planar fluid layer is studied by numerical simulation of the three-dimensional time-dependent governing equations in the limit of infinite Prandtl number. Emphasis is placed on the spatial scale of weakly supercritical flows and on the generation of small-scale structures in strongly supercritical flows. The decrease of the size of weakly supercritical hexagonal convection cells that we find is in agreement with experimental results. In the case of high Marangoni number, discontinuities of the temperature gradient are formed between convection cells, producing a universal spectrum E ∼ k−3 of the two-dimensional surface temperature field. The possibility of experimental verification is discussed on the basis of shadowgraph images calculated from the predicted hydrodynamic fields.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 283 , 25 January 1995 , pp. 201 - 230
Copyright
© 1995 Cambridge University Press

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