基于格子玻尔兹曼模型的微米级铝颗粒氧化层传热熔化特性

doi:10.13229/j.cnki.jdxbgxb.20230677

吉林大学学报(工学版) ›› 2025, Vol. 55 ›› Issue (4): 1197-1206.doi: 10.13229/j.cnki.jdxbgxb.20230677

基于格子玻尔兹曼模型的微米级铝颗粒氧化层传热熔化特性

应若蒙¹(),商高屹²,刘振超¹(),王等旺³,王盛¹

^1.西安交通大学能源与动力工程学院，西安 710049
^2.西安交通大学电气绝缘与电力设备国家重点实验室，西安 710049
^3.西北核技术研究所，西安 710024

收稿日期:2023-06-30 出版日期:2025-04-01 发布日期:2025-06-19
通讯作者: 刘振超 E-mail:Ruomeng@stu.xjtu.edu.cn;lzhchao@xjtu.edu.cn
作者简介:应若蒙（1997-），女，博士. 研究方向：颗粒的熔化与燃烧.E-mail： Ruomeng@stu.xjtu.edu.cn
基金资助:
国家自然科学基金项目(11872318)

Heat transfer and melting characteristics of micronmeter-sized aluminum particle oxide layers based on lattice Boltzmnn model

Ruo-meng YING¹(),Gao-yi SHANG²,Zhen-chao LIU¹(),Deng-wang WANG³,Sheng WANG¹

^1.School of Energy and Power Engineering，Xi'an Jiaotong University，Xi'an 710049，China
^2.State Key Laboratory of Electrical Insulation and Power Equipment，School of Energy and Power Engineering，Xi'an Jiaotong University，Xi'an 710049，China
^3.Northwest Institute of Nuclear Technology，Xi'an 710024，China

Received:2023-06-30 Online:2025-04-01 Published:2025-06-19
Contact: Zhen-chao LIU E-mail:Ruomeng@stu.xjtu.edu.cn;lzhchao@xjtu.edu.cn

摘要/Abstract

摘要：

建立了基于焓的二维格子玻尔兹曼模型（LBM），研究了不同边界条件以及不同颗粒粒径下微米级铝颗粒氧化层在熔化过程中的温度分布、平均液相分数和熔化结束时间。结果表明：自然对流浮升力对熔化特性有着显著影响；在单个加热壁加热时，自然对流的浮升力使下壁面加热时的熔化进程最快，上壁面时的最慢；当两个加热壁共同作用时，上下加热壁条件下的熔化最快，与左右加热壁的条件相比，熔化时间缩短了18.05%；随着加热壁的数量增多，熔化效率的提升效果减弱。通过计算发现，与单加热壁相比，双加热壁、三加热壁和四加热壁的熔化效率分别提升了21%、73%和75%。冷壁面的存在使熔化进程变慢，但影响仅存在于熔化进程的后半段。此外，颗粒粒径的增大可以加速熔化，但这一特征也会随着粒径的增大逐渐减弱。

关键词: 工程热物理, 格子玻尔兹曼, 液相分数, 熔化特性

Abstract:

In this paper， a two-dimensional lattice Boltzmann model based on enthalpy was established to study the temperature distribution， average liquid fraction and melting end time of the oxide layer of micronmeter-sized aluminum particles under different boundary conditions and particle sizes. The results show that the natural convection buoyancy has a significant effect on the melting characteristics. When a single heating wall is heated， due to the influence of natural convection buoyancy， the melting process of the lower wall is the fastest， and the melting speed of the upper wall is the slowest. When the two heating walls act together， the melting speed of the upper and lower heating walls is the fastest， and the melting time is shortened by 18.05% compared to the conditions of the left and right heating walls. As the number of heating walls increases， the improvement effect of melting efficiency weakens. Through calculation， it was found that compared with a single heating wall， the melting efficiency of double heating walls， three heating walls， and four heating walls increased by 21%， 73%， and 75%， respectively. The presence of a cold wall slows down the melting process， but the impact only exists in the latter half of the melting process. In addition， an increase in particle size can accelerate melting， but this characteristic will gradually weaken as the particle size increases.

Key words: engineering thermophysics, lattice Boltzmann, liquid fraction, melting characteristics

中图分类号:

TK16

应若蒙,商高屹,刘振超,王等旺,王盛. 基于格子玻尔兹曼模型的微米级铝颗粒氧化层传热熔化特性[J]. 吉林大学学报(工学版), 2025, 55(4): 1197-1206.

Ruo-meng YING,Gao-yi SHANG,Zhen-chao LIU,Deng-wang WANG,Sheng WANG. Heat transfer and melting characteristics of micronmeter-sized aluminum particle oxide layers based on lattice Boltzmnn model[J]. Journal of Jilin University(Engineering and Technology Edition), 2025, 55(4): 1197-1206.

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物理量	实际单位	LB单位
长度L	1 μm	1
黏度υ	0.407×10⁶（m²/s）	1/6
比热容C_p	1 250 J/（kg?K）	9.65×10⁴
熔融潜热L_f	16.435×10⁶（J/kg）	2.84×10⁶

基于格子玻尔兹曼模型的微米级铝颗粒氧化层传热熔化特性

Heat transfer and melting characteristics of micronmeter-sized aluminum particle oxide layers based on lattice Boltzmnn model

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