Effect of Marangoni convection by using computation simulation during the Kyropoulos sapphire crystal growth

DOI

10.2991/icismme-15.2015.351How to use a DOI?

Keywords

computer simulation; Marangoni convection; Kyropoulos; sapphire

Abstract

In the study, the effect of Marangoni convection is investigated on heat transport and melt-crystal interface during the Kyropoulos sapphire crystal growth by using the numerical simulation method. The presence of Marangoni convection increases the convexity of melt-crystal interface and causes the temporal concave of crystal during the shoulder turning stage. The clockwise vortex exposes near the triple point which leads to the beginning of remelting and Marangoni convection aggravates the remelting at the equal-diameter stage. During the last stage, Marangoni convection reinforces the main vortex near the free surface greatly and gives rise to the interface inversion,which brings about the cracking at the bottom of crystal. The numerical simulation results agree well with the experiment photo.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - M.W Sun
AU  - Y.C. Gao
AU  - X. Gao
AU  - L. Zhang
AU  - H.X. Chen
PY  - 2015/07
DA  - 2015/07
TI  - Effect of Marangoni convection by using computation simulation during the Kyropoulos sapphire crystal growth
BT  - Proceedings of the First International Conference on Information Sciences, Machinery, Materials and Energy
PB  - Atlantis Press
SP  - 1698
EP  - 1702
SN  - 1951-6851
UR  - https://doi.org/10.2991/icismme-15.2015.351
DO  - 10.2991/icismme-15.2015.351
ID  - Sun2015/07
ER  -