TY - JOUR
T1 - Transition flow modes in Czochralski convection
AU - Choi, Jung Il
AU - Kim, Seungtae
AU - Sung, Hyung Jin
AU - Nakano, Akifumi
AU - Koyama, Hide S.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1997/9
Y1 - 1997/9
N2 - A laboratory experiment of critical transition flow modes in Czochralski convection was performed. Numerical computation was also made to delineate the dynamic transition mechanism of flow modes. The period of temperature oscillation (tp) and the interval of temperature oscillation (Δθ) were scrutinized to capture the critical transition regime. The mixed convection parameter was varied in a range 0.134 ≤ Ra/PrRe2 ≤ 3.804. The computed results were shown to be in good agreement with the experimental data. The influence of the Prandtl number on the transition was examined for Pr = 910, 4445 and 8889. To understand the transition mechanism, the detailed temperature oscillation modes, the isolines of meridional temperature and the axial velocity profiles were investigated. The effect of the rotations of crucible on the transient flow modes were also examined.
AB - A laboratory experiment of critical transition flow modes in Czochralski convection was performed. Numerical computation was also made to delineate the dynamic transition mechanism of flow modes. The period of temperature oscillation (tp) and the interval of temperature oscillation (Δθ) were scrutinized to capture the critical transition regime. The mixed convection parameter was varied in a range 0.134 ≤ Ra/PrRe2 ≤ 3.804. The computed results were shown to be in good agreement with the experimental data. The influence of the Prandtl number on the transition was examined for Pr = 910, 4445 and 8889. To understand the transition mechanism, the detailed temperature oscillation modes, the isolines of meridional temperature and the axial velocity profiles were investigated. The effect of the rotations of crucible on the transient flow modes were also examined.
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U2 - 10.1016/S0022-0248(97)00212-1
DO - 10.1016/S0022-0248(97)00212-1
M3 - Article
AN - SCOPUS:0031549443
VL - 180
SP - 305
EP - 314
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
IS - 2
ER -