Study on Flow and Heat Transfer Characteristics of Porous Media in Engine Particulate Filters Based on Lattice Boltzmann Method

被引：11

作者：

Fu, Jiale ^{[1
]}

Zhang, Tiechen ^{[1
]}

Li, Menghan ^{[1
]}

Li, Su ^{[1
]}

Zhong, Xianglin ^{[2
]}

Liu, Xiaori ^{[1
]}

机构：

[1] Hebei Univ Technol, Sch Energy & Environm Engn, Tianjin 300401, Peoples R China

[2] China Automot Technol & Res Ctr, Natl Engn Lab Mobile Source Emiss Control Technol, Tianjin 300300, Peoples R China

来源：

ENERGIES | 2019年 / 12卷 / 17期

关键词：

particulate filters; porous media; lattice Boltzmann method; cellular automata method; NUMERICAL-SIMULATION; NATURAL-CONVECTION; IMMERSED BOUNDARY; BGK MODEL; FLUID; EFFICIENCY; DYNAMICS; INERTIA; LAW;

D O I：

10.3390/en12173319

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

To investigate the laminar flow characteristics of porous media in the inner core of engine particulate filters, a two-dimensional lattice Boltzmann-Cellular Automata (LB-CA) probabilistic model is used to simulate the flow characteristics of porous media. The variation of dimensionless permeability of various numerical structures on pore scale with Reynolds number is analyzed, and the heat transfer as well as particle filtration are considered. The results show that the flow law of different structures obeys Darcy law under the condition of low Reynolds number (Re < 1). The dimensionless permeability coefficient of the ordered structure is significantly higher than that of the disordered structure; however. the filtration efficiency of the ordered structure decreases. With the increase of Reynolds number, the heat transfer increases. Furthermore, it is found that the particle size has a great influence on the filtration efficiency.

引用

页数：29

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