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Two bifurcation transition processes in floating half zone convection of larger Prandtl number fluid

Two bifurcation transition processes in floating half zone convection of larger Prandtl number fluid Abstract Processes of the onset oscillation in the thermocapillary convection under the Earth's gravity are investigated by the numerical simulation and experiments in a floating half zone of large Prandtl number with different volume ratio. Both computational and experimental results show that the steady and axisymmetric convection turns to the oscillatory convection ofm=1 for the slender liquid bridge, and to the oscillatory convection before a steady and 3D asymmetric state for the case of a fat liquid bridge. It implies that, there are two critical Marangoni numbers related, respectively, to these two bifurcation transitions for the fat liquid bridge. The computational results agree with the results of ground-based experiments. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Acta Mechanica Sinica" Springer Journals

Two bifurcation transition processes in floating half zone convection of larger Prandtl number fluid

"Acta Mechanica Sinica" , Volume 18 (4): 14 – Aug 1, 2002

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References (20)

Publisher
Springer Journals
Copyright
2002 Chinese Journal of Mechanics Press
ISSN
0567-7718
eISSN
1614-3116
DOI
10.1007/BF02487785
Publisher site
See Article on Publisher Site

Abstract

Abstract Processes of the onset oscillation in the thermocapillary convection under the Earth's gravity are investigated by the numerical simulation and experiments in a floating half zone of large Prandtl number with different volume ratio. Both computational and experimental results show that the steady and axisymmetric convection turns to the oscillatory convection ofm=1 for the slender liquid bridge, and to the oscillatory convection before a steady and 3D asymmetric state for the case of a fat liquid bridge. It implies that, there are two critical Marangoni numbers related, respectively, to these two bifurcation transitions for the fat liquid bridge. The computational results agree with the results of ground-based experiments.

Journal

"Acta Mechanica Sinica"Springer Journals

Published: Aug 1, 2002

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