Open AccessCOUPLING OF MELTING-SOLIDIFICATION PHASE CHANGE CONVECTION WITH FLOATING ZONE CONVECTION UNDER MICROGRAVITY
Author(s) -
Xiong Bin,
Tang Ze-Mei,
Wenrui Hu
Publication year - 1991
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.40.1809
Subject(s) - marangoni effect , convection , materials science , surface tension , natural convection , mechanics , coupling (piping) , vortex , crystal (programming language) , rayleigh–bénard convection , crystal growth , combined forced and natural convection , finite element method , phase (matter) , thermodynamics , physics , composite material , quantum mechanics , computer science , programming language
A finite element algorithm is used to analyze the process of floating zone Gystal growth under microgravity. The effect of phase change convection coupled with surface tension convection is considered. The results show that the rate of crystal growth is very important. The single-crystal-melt interface is steeper than the feed-melt interface during the process of crystal growth. When the rate exceeds a critical value, the Marangoni vortex nearby the feed-melt interface will become so large that a secondary vortex exists.