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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental study on complex flow of a binary mixture in Czochralski configurations with different aspect ratios and rotation rates
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Experimental study on complex flow of a binary mixture in Czochralski configurations with different aspect ratios and rotation rates

机译：Czochralski构型中不同纵横比和旋转速率的二元混合物复杂流动的实验研究

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摘要

This paper reported the experimental study on complex flow stability of a binary mixture in the Czochralski configurations subjected to a radial temperature gradient. The working fluid was the n~ decane-hexane mixture with an initial mass fraction of 50%. Results show that the rotation of crucible and crystal can promote the flow destabilization at a small aspect ratio. However, the crucible rotation can suppress the flow instability at a large aspect ratio. When the thermocapillary Reynolds number exceeds a certain threshold value, the hydrothermal waves, the bud shaped and fringes spokes appear in proper order with the increase of the aspect ratio. Furthermore, the flow patterns are also dependent on the crystal and crucible rotation rates. When the crystal and crucible rotate synchronously, the temperature fluctuation frequency in the binary mixture is nearly the same with that in the pure fluid at a small aspect ratio; however, there is a large difference at a large aspect ratio. Moreover, the temperature fluctuation amplitude in the binary mixture is greater than that in the pure fluid at a small aspect ratio, but it is contrary at a large aspect ratio.
机译：本文报道了在径向温度梯度下切克劳斯基结构中二元混合物复杂流动稳定性的实验研究。工作流体是初始质量分数为50％的正癸烷/正己烷混合物。结果表明，坩埚和晶体的旋转可以在较小的纵横比下促进流动不稳定。然而，坩埚旋转可以以大的纵横比抑制流动不稳定性。当热毛细管雷诺数超过一定阈值时，随着长径比的增加，水热波，芽状和条纹状辐条会以适当的顺序出现。此外，流动方式还取决于晶体和坩埚的旋转速率。当晶体和坩埚同步旋转时，二元混合物中的温度波动频率与长径比小的纯流体中的温度波动频率几乎相同；但是，宽高比大时差异大。此外，在长宽比小的情况下，二元混合物中的温度波动幅度大于在纯流体中的温度波动幅度，但是在大长宽比的情况下则相反。

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  • 作者

    You-Rong Li; Lu Zhang; Li Zhang; Chun-Mei Wu;

  • 作者单位

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China;

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China;

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China;

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Complex flow; Binary mixture; Experiment; Cz configuration; Flow pattern;

    机译：复杂的流量;二元混合物实验;Cz配置;流型;

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