| Bi12SiO20熔体表面张力对流研究 |
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| 引用本文： | 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. |
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| 作者姓名： | 梁歆桉 金蔚青 潘志雷 刘照华 |
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| 作者单位： | 中国科学院上海硅酸盐研究所，上海２０００５０ |
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| 基金项目： | 攀登计划(攀95-预-34)资助项目;
国家自然科学基金重点资助项目(59832080) |
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| 摘 要： | 利用高温熔体实时观察装置观察和研究了Ｂi12SiO2０熔体表面张力对流从稳态向振荡态的转变过程；稳态过程中的对流图样变化；可能与对流转变有关的两个对流区域的交叉；振荡态对流的分叉现象。
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| 关 键 词： | Bi12SiO20熔体 表面张力 实时观察 对流转变 |
| 文章编号： | 1000-324X(2001)01-0032-05 |
| 收稿时间： | 2000-1-7 |
| 修稿时间： | 2000年1月7日 |
Study on Bi12SiO20 Melt Marangoni Convection |
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| LIANG Xin-An,JIN Wei-Qing,PAN Zhi-Lei,LIU Zhao-Hua.Study on Bi12SiO20 Melt Marangoni Convection[J].Journal of Inorganic Materials,2001,16(1):32-36. |
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| Authors: | LIANG Xin-An JIN Wei-Qing PAN Zhi-Lei LIU Zhao-Hua |
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| Affiliation: | ShanghaiInstituteofCeramics;ChineseAcademyofScience;Shanghai200050;China |
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| 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 5-7Hz. 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. |
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| Keywords: | in-situ observation Bi12SiO20 Marangoni Convection oscillatory transition |
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