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Velocity Field of Thermocapillary Convection in High Temperature Oxide Solution |
| JIN Wei-Qing1;YODA Shinichi2;JIANG Yuan-Fang3;LIANG Xin-An1;PAN Zhi-Lei1;SHEN Guo-Tu3;LIU Zhao-Hua1 |
| 1Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050
2Space Utilization Research Center, Office of Space Utilization System, NASDA, 2-1-1 Sengen, Tsukuba, Ibaraki 305, Japan
3Department of Physics, East China Normal University, Shanghai 200062
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| Cite this article: |
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JIN Wei-Qing, YODA Shinichi, JIANG Yuan-Fang et al 2001 Chin. Phys. Lett. 18 435-436 |
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Abstract We have investigated experimentally and theoretically the thermocapillary convective flow phenomena in a loop-shaped Pt wire heater of KNbO3(20wt.%) and Li2B4O7 solution. Optical evaluations in connection with thermocouple measurements made it possible to get a new type of thermocapillary convective flow in the considered system. To study the kinematical behavior of thermocapillary convection, we have measured the stream velocities of flow. In a theoretical analysis, the flow velocity due to thermocapillary effect alone was estimated by balancing the surface tension forces by viscous forces. The velocity distribution in the solution near the margin of the heater was obtained, which is in agreement with the experimental result.
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| Keywords:
78.20.Bh
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Published: 01 March 2001
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| PACS: |
78.20.Bh
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(Theory, models, and numerical simulation)
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