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首页> 外文期刊>International Journal of Heat and Mass Transfer >Measurement of solute diffusivities. Part III. From solutal convection dominated transport to quasi-diffusive transport
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Measurement of solute diffusivities. Part III. From solutal convection dominated transport to quasi-diffusive transport

机译：溶质扩散率的测量。第三部分从对流占主导的运输到准扩散运输

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摘要

This paper presents an analytical and experimental investigation of the new ground-based method for diffusion measurements in liquid metals presented in the two companion papers [Int. J. Heat Mass Transfer 17 (2001) 1639] and [Int. J. Heat Mass Transfer 44 (2001) 3345]. The configuration under consideration is a horizontal capillary tube submitted to a vertical steady magnetic field; the temperature field is assumed isothermal. The aim of this third part is to introduce a single description of transport in a diffusion experiment over a wide range of parameters (namely magnetic field intensity and experimental duration), which overlaps both the two asymptotic models previously presented. The experimental results, obtained in two different apparatus, are in good agreement with the analytical model and exhibit a fair repeatability. The impurity diffusion coefficient of Bi in Sn is measured at 275℃ and near the fusion point, in good agreement with recent microgravity data.
机译：本文介绍了两种伴随论文中提出的对液态金属扩散测量的新地面方法的分析和实验研究。热传质17（2001）1639]和[Int。 J.热质传递44（2001）3345]。所考虑的配置是水平毛细管受到垂直稳定磁场的作用。假定温度场是等温的。第三部分的目的是对扩散实验中的各种参数（即磁场强度和实验持续时间）的迁移进行单一描述，该参数与先前介绍的两个渐近模型都重叠。在两种不同的仪器中获得的实验结果与分析模型非常吻合，并且具有相当的可重复性。 Bi在Sn中的杂质扩散系数是在275℃和接近熔点的条件下测定的，与最近的微重力数据吻合良好。

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