On the accuracy of the interdiffusion measurements at low and moderate Rayleigh numbers. Some computational considerations

X. Ruiz; J. Pallares; F.X. Grau

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On the accuracy of the interdiffusion measurements at low and moderate Rayleigh numbers. Some computational considerations

机译：关于中低瑞利数互扩散测量的准确性。一些计算上的考虑

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Using a typical shear cell arrangement, the degree of accuracy attained in the determination of the interdiffusion coefficients at low and moderate thermal and solutal Rayleigh numbers is analyzed here. It is concluded that, despite the marked directionality of these Fickian processes, thermal convective contamination is always negligible in real experiments but solutal convective contamination can be important even for moderate values of the solutal Rayleigh number. Nevertheless, in the range of values investigated and due to the above-mentioned directionality, the solutal convection could be minimized orienting the cell in such a way that its axis remains constantly aligned with the direction of the external disturbance.

机译：使用典型的剪切单元布置，在这里分析在确定中低热瑞利数和瑞利数时的互扩散系数中获得的精度。结论是，尽管这些Fickian过程具有明显的方向性，但在实际实验中热对流污染始终可以忽略不计，但即使对于中等瑞利数的数值，对流污染也很重要。然而，在所研究的值的范围内并且由于上述方向性，可以以使单元的轴保持与外部扰动的方向始终对准的方式使对流最小化。

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来源
《International Journal of Heat and Mass Transfer》 |2010年第20期|P.3708-3720|共13页
作者
X. Ruiz; J. Pallares; F.X. Grau;
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作者单位

Institut d'Estudis Espacials de Catalunya, IEEC, Barcelona, Spain Applied Physics Lab., Universitat Rovira i Virgili, Tarragona, Spain;

rnMechanical Engineering Department, Universitat Rovira i Virgili, Tarragona, Spain;

rnMechanical Engineering Department, Universitat Rovira i Virgili, Tarragona, Spain;

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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
diffusion coefficients; numerical models; microgravity conditions; melted semiconductors; liquid metals;

机译：扩散系数;数值模型微重力条件;熔化的半导体液态金属;

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On the accuracy of the interdiffusion measurements at low and moderate Rayleigh numbers. Some computational considerations

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