期刊
OPEN PHYSICS
卷 20, 期 1, 页码 349-369出版社
DE GRUYTER POLAND SP Z O O
DOI: 10.1515/phys-2021-0016
关键词
lattice Boltzmann method; particulate filters; porous media; cellular automata method; Quartet Structure Generation Set
资金
- National Natural Science Foundation of China [52005149]
- Natural Science Foundation of Hebei Province [E2018202064]
- National Engineering Laboratory for Mobile Source Emission Control Technology [NELMS2017B06]
- State Key Laboratory of Engines, Tianjin University [K2020-15]
In this article, the Lattice Boltzmann Method (LBM) is used to study the flow and heat transfer characteristics of diesel particulate filter wall porous media. The study reveals that the distribution of porous media structure has an impact on the heat transfer and flow characteristics. Complex structures are analyzed to understand their effects on the flow and heat transfer characteristics.
To study the flow and heat transfer characteristics of diesel particulate filter wall porous media, Lattice Boltzmann Method (LBM) is used to simulate and analyze different structures in this article. On studying the heat transfer and flow characteristics of regular structures such as parallel and staggered structures, it is proved that the distribution of porous media structure has an effect on the heat transfer and flow characteristics. The effects of different structure distributions on the flow and heat transfer characteristics are analyzed by studying the complex structures such as random structure and the structure of Quartet Structure Generation Set (QSGS). The influences of different fiber diameters on the parameters under the parallel arrangement, the staggered arrangement, and the random arrangement is considered. The flow and heat transfer characteristics of the QSGS structure and Sierpinski carpets structure are also considered. Under the same porosity, different fiber diameters have effect on dimensionless permeability coefficient, pressure gradient, and filtration efficiency. The different structures of porous media affect the temperature and pressure distribution. For the relatively complex structure, the flow resistance is greater. The increase in Re will reduce the temperature gradient, and with the increase in Re, the flow in the structure will be more uniform.
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