2024-03-29T08:11:34Z
https://nagoya.repo.nii.ac.jp/oai
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2023-01-16T04:06:11Z
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Combustion simulation with Lattice Boltzmann method in a three-dimensional porous structure
Yamamoto, Kazuhiro
52357
Takada, Naoki
52358
Misawa, Masaki
52359
Lattice Boltzmann method
3D computer tomography
Porous media
Diesel particulate filter
Soot
To simulate the flow in a three-dimensional porous structure, we have used the Lattice Boltzmann method (LBM). The distribution functions for flow, temperature, and concentration fields are solved to simulate the regeneration process of diesel particulate filter (DPF). For a benchmark study, we have conducted the calculation in simple geometry. To change the flow characteristics such as porosity and tortuosity, obstacles of different number and size are selected, which are randomly placed in the duct. The flow pattern is changed with obstacle size even at the same porosity. To confirm the validity of our calculation, the results are compared with the empirical relationships of the Blake–Kozeny and Ergun equations, in the non-dimensional form using the Ergun coordinates of Reynolds number and friction factor. Numerical results show good agreements with the empirical predictions. Soot combustion is well simulated to show the effects of oxygen on the reaction rate. Finally, the real porous geometry has been tested. The porous structure of Ni–Cr metal has been obtained by the three-dimensional computer tomography technique. Results show that the inhomogeneous flow is observed, and there are regions where the temperature is locally higher. This information is indispensable for the better design of DPF. LBM can be a good tool for combustion simulation in porous media.
journal article
Elsevier
2005-01
application/pdf
Proceedings of the Combustion Institute
1
30
1509
1515
http://dx.doi.org/10.1016/j.proci.2004.08.030
http://hdl.handle.net/2237/20031
1540-7489
https://nagoya.repo.nii.ac.jp/record/17947/files/35.pdf
eng
https://doi.org/10.1016/j.proci.2004.08.030
NOTICE: This is the author's version of a work that was accepted for publication in Proceedings of the Combustion Institute. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms, may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Proceedings of the Combustion Institute. v.30, n.1, 2005, p.1509–1515, DOI: http://dx.doi.org/10.1016/j.proci.2004.08.030