Solutal convection in crystal growth: effect of interface curvature on flow structuration in a three-dimensional cylindrical configuration

Due to temperature and concentration gradients in the molten phase, it is well known that convective flows can develop in the bulk under normal conditions of gravity. These motions modify the shape of the growing interface and the concentration distribution along it. This study will only focus on th...

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Bibliographic Details
Published in:Journal of crystal growth 1997-10, Vol.180 (3-4), p.597-603
Main Authors: Holuigue, J., Bertrand, O., Arquis, E.
Format: Article
Language:English
Subjects:
3D flow
Cross-disciplinary physics: materials science
rheology
Cylindrical configuration
Exact sciences and technology
Growth from melts
zone melting and refining
Materials science
Methods of crystal growth
physics of crystal growth
Physics
Solutal convection
Theory and models of crystal growth
physics of crystal growth, crystal morphology and orientation
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Summary:Due to temperature and concentration gradients in the molten phase, it is well known that convective flows can develop in the bulk under normal conditions of gravity. These motions modify the shape of the growing interface and the concentration distribution along it. This study will only focus on the case of pure solutal convection and the effect of a given interface curvature on the flow. In particular, the transition from a 3D-flow to a 2D one as a function of the interface curvature is examined in order to investigate possible values of the operating parameters and fluid properties. The main aim is to justify the use of 2D-simulation tools for predicting the convective transport in cylindrical crystal growth ampoules.
ISSN:0022-0248
1873-5002
DOI:10.1016/S0022-0248(97)00256-X