| INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Phase-field simulation dendritic growth under forced convection with hypergravity |
| Jianjing Zheng(郑建靖)1,2,†, Xuanxuan Zhou(周旋旋)1,2, Daosheng Ling(凌道盛)1,2, and Kunming Song(宋坤明)1,2 |
1 Institute of Hypergravity Science and Technology, Zhejiang University, Hangzhou 310058, China;
2 Key Laboratory of Soft Soils and Geoenvironmental Engineering (Ministry of Education), Zhejiang University, Hangzhou 310058, China |
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Abstract The phase-field method is used to study the free dendritic crystal growth under forced convection with hypergravity, the hypergravity term is introduced into the liquid-phase momentum equation to examine the dendritic growth. The paper focuses on the morphology of dendrite growth as well as the tip radius of the upstream dendritic arm and the average growth velocity of dendrite tips under different hypergravity levels. The results show that the morphology of dendrite changes significantly under represent simulation conditions when the hypergravity reaches $35\bm g_0$, the upstream dendritic arm will bifurcate and the horizontal dendrite arms gradually tilt upwards. This change is mainly caused by the hypergravity and flow changing the temperature field near the dendrite interface. In addition, before the morphology of the dendrite is significantly altered, the radius of the tip of the dendrite upstream arm becomes larger with the increase in hypergravity, and the average growth velocity will increase linearly with it. The morphology of dendritic growth under different hypergravity and the changes in the tip radius along with the average growth velocity of the upstream dendritic tip with hypergravity are given in this paper. Finally, the reasons for these phenomena are analyzed.
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Received: 16 March 2025
Revised: 10 May 2025
Accepted manuscript online: 04 June 2025
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PACS:
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81.10.Aj
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(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
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| Fund: This work was supported by the National Natural Science Foundation of China (Grant No. 52588202). |
Corresponding Authors:
Jianjing Zheng
E-mail: zhengjianjing@zju.edu.cn
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Cite this article:
Jianjing Zheng(郑建靖), Xuanxuan Zhou(周旋旋), Daosheng Ling(凌道盛), and Kunming Song(宋坤明) Phase-field simulation dendritic growth under forced convection with hypergravity 2025 Chin. Phys. B 34 108102
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