Convection effect on dendritic growt using phase-field method

Phase-field model was employed to quantitatively study the effect of convection on pattern selection and growth rate of 2D and 3D dendrite tip, as well as the effect of the different convection velocity on the dendritic growth. The calculated results show that crystal is asymmetric in the priority d...

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Bibliographic Details
Published in:China foundry 2010 (1), p.52-56
Main Author: Zhu Changsheng Wang Zhiping Gui Jin Xiao Rongzhen
Format: Article
Language:English
Subjects:
中上游地区
对流作用
晶体生长
枝晶尖端
生长速度
相场模型
相场法
计算结果
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Summary:Phase-field model was employed to quantitatively study the effect of convection on pattern selection and growth rate of 2D and 3D dendrite tip, as well as the effect of the different convection velocity on the dendritic growth. The calculated results show that crystal is asymmetric in the priority direction of growth under flow. The dentritic growth is promoted in the upstream region and suppressed in the downstream region. Convection can cause deviation in the dendrite growth direction and the preferred direction of the columnar crystals. It has been found that both primary dendrite stem and secondary dendrite arm deflect significantly towards upstream direction, secondary dendrite arm in upstream direction is more developed than the primary dendrite in downstream direction.
ISSN:1672-6421
2365-9459