[1] Liang Wenqing, , Lei Gang, et al. Impact of a background velocity field on solidification growthof single-crystal nuclei using the PF-LBM [J]. Journal of Southeast University (English Edition), 2022, 38 (4): 373-382. [doi:10.3969/j.issn.1003-7985.2022.04.006]

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Impact of a background velocity field on solidification growthof single-crystal nuclei using the PF-LBM()

基于PF-LBM背景速度场对单晶核凝固生长的影响

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

38

Issue:

2022 4

Page:

373-382

Research Field:

Energy and Power Engineering

Publishing date:

2022-12-20

Info

Title:

Impact of a background velocity field on solidification growthof single-crystal nuclei using the PF-LBM

基于PF-LBM背景速度场对单晶核凝固生长的影响

Author(s):

Liang Wenqing ¹;  2;  3;  Lei Gang²;  Xun Qining⁴;  Shu Zhiyong¹;  3;  Wang Tianxiang²Qian Hua¹;  Zhao Dongliang¹;  Zheng Xiaohong¹

¹ School of Energy and Environment, Southeast University, Nanjing 210096, China
² State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing 100028, China
³ State Key Laboratory of Technologies in Space Cryogenic Propellants-SEU Research Center, Nanjing 210096, China
⁴ Shandong Institute of Non-metallic Materials, Jinan 250031, China

梁文清 ¹;  2;  3;  雷刚²;  荀其宁⁴;  疏志勇 ¹;  3;  王天祥 ²钱华 ¹;  赵东亮 ¹;  郑晓红¹

¹ 东南大学能源与环境学院, 南京 210096; ² 航天低温推进剂技术国家重点实验室, 北京 100028; ³ 航天低温推进剂技术国家重点实验室东南大学基地, 南京 210096; ⁴ 山东非金属材料研究所, 济南 250031

Keywords:

single-crystal nucleus;  coupled velocity field;  simulation;  lattice Boltzmann method

单晶核;  耦合速度场;  模拟;  格子玻尔兹曼方法

PACS:

TK91

DOI:

10.3969/j.issn.1003-7985.2022.04.006

Abstract:

To promote/inhibit ice formation in the natural environment and industrial systems, the growth and evolution process of ice single-crystal nuclei were simulated using the phase field-lattice Boltzmann method(PF-LBM), and the influence of a background flow field on the growth of single-crystal nucleus dendrites was also analyzed. The results show that the flow field makes dendrite growth asymmetric. The growth of dendrites is more developed on the upstream side than on the downstream side. The dendrite tip growth rate and tip radius are greater on the upstream side than on the downstream side. The solid phase ratio is greater with a background flow field than without one. The higher the flow velocity is, the more developed the dendrites on the upstream side, the faster the dendrites grow, and the higher the dendrite tip growth rate. The dendrites on the backflow side have a lower flow rate and a lower degree of supercooling than those on the upstream side, which inhibits the solidification process, the growth rate is slow, and the dendrites are underdeveloped.

在自然环境和工业系统中为了促进/抑制冰的形成, 采用相场-粒子玻尔兹曼方法模拟了冰单晶核的生长演化过程, 并分析背景流场条件对单晶核晶枝生长的影响.结果表明:背景流场使枝晶生长呈现不对称形状, 即迎流侧的单晶核晶枝远比背流侧晶枝发达;迎流侧晶枝顶端生长速率远大于背流侧的枝晶生长速率, 上游侧的晶枝尖端半径大于背流侧的晶枝尖端半径;在有背景流场条件下, 单晶核的固相比大于无背景流场.背景流场的流速越高, 迎流侧枝晶越发达, 枝晶生长速度越快, 枝晶尖端生长速度也越快.背流侧的流场流速较低, 过冷度低于迎流侧, 抑制了凝固过程, 生长速度较慢, 枝晶生长受到抑制.

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Memo

Memo:

Biographies: Liang Wenqing(1977—), male, doctor, lecturer; Zheng Xiaohong(corresponding author), female, doctor, associate professor, xhzheng@seu.edu.cn.
Foundation item: The National Key Research and Development Program of China(No.2020YFB1506203).
Citation: Liang Wenqing, Lei Gang, Xun Qining, et al. Impact of a background velocity field on solidification growth of single-crystal nuclei using the PF-LBM[J].Journal of Southeast University(English Edition), 2022, 38(4):373-382.DOI:10.3969/j.issn.1003-7985.2022.04.006.

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