LATTICE BOLTZMANN SIMULATION OF DYNAMIC OXYGEN ADSORPTION IN COAL BASED ON FRACTAL CHARACTERISTICS

被引：3
|
作者：
Li, Zijin [1 ]
Guo, Huiyan [1 ]
Zhou, Hongxiang [1 ]
Guo, Chang [2 ]
Nie, Rongshan
Liang, Xiaoyu [1 ,2 ]
机构：
[1] China Jiliang Univ, Coll Metrol & Measurement Engn, Hangzhou, Peoples R China
[2] China Jiliang Univ, Coll Qual & Safety Engn, Hangzhou, Peoples R China
来源：
THERMAL SCIENCE | 2023年 / 27卷 / 4A期
关键词：
coal oxygen adsorption; fractal dimension; pore structure; lattice Boltzmann method; HEAT-TRANSFER;
D O I：
10.2298/TSCI220718202L
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The issue of coal spontaneous combustion greatly threatens the production safety of coal mining, storage, and transportation. It is significant to study oxygen adsorption understand the mechanism of coal spontaneous combustion. In this paper, based on the fractal dimension of coal and the self-similar fractal geometry, the internal pore structure of coal is modeled. Then, the lattice Boltzmann method is employed to conduct the numerical simulation of oxygen adsorption in coal. Compared with the existing experimental data and numerical simulation, the lattice Boltzmann method is verified to be correct. The numerical results indicate that in the process of oxygen adsorption in coal, the preferential flow occurs when the large pores connect to the channel. In the meantime, the large diffusion coefficient leads to an early time for adsorption equilibrium. The oxygen adsorption increases with an increased adsorption rate constant. Pore structure plays a significant role in the adsorption behavior of oxygen in coal. The results can provide theoretical support for reducing coal spontaneous combustion and ensuring coal mine safety in production.
引用
收藏
页码：2789 / 2800
页数：12
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