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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Experimental study on the magnetic convection in a vertical cylinder
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Experimental study on the magnetic convection in a vertical cylinder

机译：垂直圆柱体中磁对流的实验研究

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The flow of paramagnetic fluid inside a cylinder placed in a bore of a superconducting magnet was studied experimentally. single-phase closed thermosyphon configuration was employed. The lower side wall of the cylindrical enclosure was heated while the upper side wall was cooled with the thin adiabatic interface in between. The experiment was carried out with an aqueous solution of glycerol. The magnetic susceptibility of the working fluid was increased by adding Gd(NO3)(3) x 6H(2)O and was measured by a magnetic susceptibility balance. The encapsulated liquid crystal slurry (KWN-2025, Japan Capsular Product Inc.) dispersed in the working fluid was illuminated in the middle height horizontal cross-section of the enclosure to visualize the temperature field. The color images of flow mode were taken by a digital camera. The average heat transfer rates were also measured. Depending on the Rayleigh number, different spoke patterns were observed. The number of angular structures (spokes) increased with increase not only in the Rayleigh number but also in the strength of magnetic field. The heated fluid was repelled by the magnetic field, while the cooled fluid was attracted. The magnetic field enhanced the heat transfer rate. (c) 2005 Elsevier Inc. All rights reserved.
机译：实验研究了放置在超导磁体孔中的圆柱体内顺磁性流体的流动。采用单相封闭热虹吸配置。加热圆柱形外壳的下侧壁，同时冷却上侧壁，并在两者之间形成薄绝热界面。实验用甘油水溶液进行。通过添加Gd（NO3）（3）x 6H（2）O来增加工作流体的磁化率，并通过磁化率平衡进行测量。将分散在工作流体中的封装的液晶浆料（KWN-2025，Japan Capsular Product Inc.）照射在外壳的中高水平横截面上以可视化温度场。流动模式的彩色图像由数码相机拍摄。还测量了平均传热速率。根据瑞利数，观察到不同的辐条图案。角结构（辐条）的数量不仅随着瑞利数的增加而增加，而且随着磁场强度的增加而增加。加热的流体被磁场排斥，而冷却的流体被吸引。磁场提高了传热速率。 （c）2005 Elsevier Inc.保留所有权利。

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