International Scientific Journal

Thermal Science - Online First

online first only

Simulating flow and heat transfer in a variety of diesel particulate filter porous structures using lattice Boltzmann method

Particulate matter (PM) has important influences on premature human mortality. Diesel particulate filter (DPF) is one of the most effective means to reduce PM in exhaust gas. In order to study the three-dimensional flow characteristics of DPF porous structure, lattice Boltzmann method (LBM) is used to study the flow and heat transfer characteristics of different structures. In some software, the spherical structure is used as DPF porous structure. In paper, the spherical structure, the Quartet Structure Generation Set (QSGS) structure and the CT technique structure are constructed. The CT technique structure is constructed by the serial sections of DPF porous structure. The flow and heat transfer characteristics in different structures were simulated by LBM. The three-dimensional CT technique structure is constructed by superposing the serial section data of DPF. The results show that the pressure gradient and temperature gradient of structures are greatly affected by the structure. The pressure gradient and temperature gradient of the spherical structure is the lowest. The spherical structure and the QSGS structure are different from the porous structure of DPF in pressure gradient and temperature gradient. By comparing different structures, it can be seen that although the pressure gradients of the CT technique structure and the QSGS structure are similar, the temperature gradient of the two structures are more different.
PAPER REVISED: 2022-03-02
PAPER ACCEPTED: 2022-03-16
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