The effect of shear flow on the dendritic characteristics
The effect of shear flow on the dendritic characteristics
复制标题
剪切流对枝晶特性的影响
DOI:
10.1016/j.matlet.2011.05.009
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发表时间:
2011-08
影响因子:
3
通讯作者:
Changli Chen
中科院分区:
文献类型:
--
作者:
Jianyuan Wang;Wei Zhai;Kexin Jin;Changli Chen
Directional dendritic growth of transparent succinonitrile (SCN)–3.5wt.% H2O alloy in the presence of shear flow is in-situ observed. The variation of dendritic characteristics, including growth tilting angle, primary arms spacing, and dendrite tip radius are quantitatively measured in wide flow rate (U) and pulling rate (V) regimes. The experimental data show that, the titling angle towards the upstream side is in proportional to (U/V)0.6. This could be explained by the reason that the dendritic growth process is mainly influenced by the solute diffusion competition between lateral direction and normal direction. Based on this, a mathematic model, which agrees well with the experimental data, is proposed to describe the correlation among the dendritic scales, shear flow rate and pulling rate.
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