TY - JOUR
T1 - Investigation of convection control under the non-uniform RMF in a liquid bridge
AU - Yao, Liping
AU - Zeng, Zhong
AU - Chen, Jingqiu
AU - Li, Liang
AU - Mizuseki, Hiroshi
AU - Kawazoe, Yoshiyuki
N1 - Funding Information:
The authors are grateful to the staff of the Centre for Computer Materials Science at the Institute for Materials Research, Tohoku University, for their continuous support of the SR8000-G1/64 supercomputing facilities. This work is supported by the National Natural Science Foundation of China (Grant No. 10872222 and 50921063), Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20110191110037), and Chongqing Natural Science Foundation (Grant No. 2009BB4207).
PY - 2012
Y1 - 2012
N2 - Under microgravity, thermocapillary flow becomes the dominant convection in float-zone crystal growth, it may lose stability with increasing Marangoni number, and the convection instability is detrimental to crystal quality. Because of the excellent electrical conductivity of semiconductor melt, the external rotating magnetic field (RMF) is applicable to control melt convection. In a typical simplified float-zone model, the influences of the non-uniform RMF, which is generated by the RMF inductor with three pairs of poles, on the three-dimensional thermocapillary flow are investigated numerically. Our results demonstrate that the axial velocities are reduced under the non-uniform RMF while the melt is stirred in azimuthal direction by RMF, as a result, the three-dimensional convection after the instability becomes to a two-dimensional axisymmetrical flow. It implies that the non-uniform RMF can control melt convection effectively for highquality crystal growth.
AB - Under microgravity, thermocapillary flow becomes the dominant convection in float-zone crystal growth, it may lose stability with increasing Marangoni number, and the convection instability is detrimental to crystal quality. Because of the excellent electrical conductivity of semiconductor melt, the external rotating magnetic field (RMF) is applicable to control melt convection. In a typical simplified float-zone model, the influences of the non-uniform RMF, which is generated by the RMF inductor with three pairs of poles, on the three-dimensional thermocapillary flow are investigated numerically. Our results demonstrate that the axial velocities are reduced under the non-uniform RMF while the melt is stirred in azimuthal direction by RMF, as a result, the three-dimensional convection after the instability becomes to a two-dimensional axisymmetrical flow. It implies that the non-uniform RMF can control melt convection effectively for highquality crystal growth.
KW - Floating zone
KW - Marangoni convection
KW - Microgravity
KW - Rotating magnetic fields
KW - Thermocapillary convection
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U2 - 10.1016/j.proeng.2012.01.1082
DO - 10.1016/j.proeng.2012.01.1082
M3 - Conference article
AN - SCOPUS:84863266994
SN - 1877-7058
VL - 31
SP - 659
EP - 664
JO - Procedia Engineering
JF - Procedia Engineering
T2 - 1st International Conference on Advances in Computational Modeling and Simulation 2011, ACMS 2011
Y2 - 14 December 2011 through 16 December 2011
ER -