无机材料学报2001，Vol.16Issue(1)：32-36,5.
Bi12SiO20熔体表面张力对流研究
Study on Bi12SiO20 Melt Marangoni Convection
摘要
Abstract
Schilren technique coupling differential interferential microscope was employed to in-situ observation high temperature Bi12SiO20 melt Marangoni convection. The bifurcation of oscillatory convection was also observed in this experiment and the oscillatory frequency was obtained as 57Hz. In the steady convection stage, the flow configuration appears as fish-like shape which comprises of a main-trunk and two branches. The width of the main-trunk decreases with temperature rising. Meanwhile, along the main-trunk two darker color regions appear symmetrically. The distance between them becomes, narrower gradually and crossed together at last. This is the critical point for the transition to oscillatory convection. The critical Marangoni number Mac 22433 experimentally obtained for Bi12SiO20 melt, agrees with a theoretical speculation Mac=2884Pr0.638 for high Prandtl number melt.关键词
Bi12SiO20 熔体/表面张力对流/实时观察/对流转变分类
数理科学引用本文复制引用
梁歆桉,金蔚青,潘志雷,刘照华..Bi12SiO20熔体表面张力对流研究[J].无机材料学报,2001,16(1):32-36,5.
