Effect of liquid shape on flow velocity induced by Marangoni convection in a floating half-zone system

Numerical simulations were performed to investigate the effect of liquid shape on the flow velocity induced by Marangoni convection in a floating half-zone. When both natural and Marangoni convections are present in such a system, because the flow direction of natural convection is opposite to that...

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Bibliographic Details
Published in:Journal of crystal growth 1999-07, Vol.204 (1), p.243-246
Main Authors: Okano, Yasunori, Audet, Nicolas, Dost, Sadik, Kunikata, Sei-ichi
Format: Article
Language:English
Subjects:
Convection and heat transfer
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Floating half-zone
Flow velocity
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Growth from melts
zone melting and refining
Liquid shape
Marangoni convection
Materials science
Methods of crystal growth
physics of crystal growth
Physics
Turbulent flows, convection, and heat transfer
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Summary:Numerical simulations were performed to investigate the effect of liquid shape on the flow velocity induced by Marangoni convection in a floating half-zone. When both natural and Marangoni convections are present in such a system, because the flow direction of natural convection is opposite to that of Marangoni convection, the maximum Reynolds number decreases as the level of gravity increases. Calculations, ignoring natural convection but taking into account the surface deformation due to gravity changes, indicate that the liquid shape affects the maximum Reynolds number, and swelling of the surface leads to a faster flow velocity for a given Marangoni number.
ISSN:0022-0248
1873-5002
DOI:10.1016/S0022-0248(99)00138-4