熔体内重力对流速度场的实验研究及其理论分析

无机材料学报

熔体内重力对流速度场的实验研究及其理论分析

金蔚青; 蒋元方⁺; 孙绪宝⁺; 潘志雷; 刘照华

中国科学院上海硅酸盐研究所; 上海 200050; ⁺华东师范大学物理系; 上海200062

收稿日期:1997-09-23 修回日期:1997-10-15 出版日期:1998-06-20 网络出版日期:1998-06-20

Experimental and Theoretical Study on Velocity Field of Buoyancy Convection in the Melt

JIN Wei-Qing; JIANG Yuan-Fang⁺; SUN Xu-Bao⁺; PAN Zhi-Lei; LIU Zhao-Hua

Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China; ⁺Physics department; East China Normal University Shanghai 200062 China

Received:1997-09-23 Revised:1997-10-15 Published:1998-06-20 Online:1998-06-20

摘要/Abstract

摘要： 应用最近开发的高温光学实时观察法研究了铌酸钾熔体的重力对流现象．通过加热直径为2．5mm的圆环形坩埚，形成厚度为0．2mm的圆形KNbO₃熔液．实验测量了熔体内温度和流体速度的分布，并从理论上对速度场的分布给出了定量分析．

关键词: 光学实时观察法, 高温熔体流体效应

Abstract: A high temperature in situ observation method was newly developed to study the buoyancydriven convection in KNbO₃ melt. A thin loop-like Pt wire heater (about 2.5mm in diameter)was employed to heat and suspend the KNbO₃ melts. A thin plane film of the sample melt wasformed. The temperature and fluid velocity profiles in the melt were measured experimentally.The quantitative analysis for the velocity of the fluid flow was also made theoretically.

Key words: in situ observation methods, high temperature melt effect

中图分类号:

金蔚青,蒋元方,孙绪宝,潘志雷,刘照华. 熔体内重力对流速度场的实验研究及其理论分析[J]. 无机材料学报.

JIN Wei-Qing,JIANG Yuan-Fang,SUN Xu-Bao,PAN Zhi-Lei,LIU Zhao-Hua. Experimental and Theoretical Study on Velocity Field of Buoyancy Convection in the Melt[J]. Journal of Inorganic Materials.