Formation of Porous Structure and Fluid Simulation
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概要
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Recently, more strict regulations for emission standards for automotive manufactures are being set in many countries including Japan. To reduce particulate matters (PM) including soot, a diesel particulate filter (DPF) of ceramic porous material has been developed. However, since the structure of DPF is very complex, it is difficult to understand the flow and phenomena in the filter. In this study, we simulate the flow in porous media by the Lattice Boltzmann method. The porous structure is formed in two-phase self-aggregative fluids to obtain uniform and non-uniform inner structure with different porosity and wetted surface. Results show that the flow pattern is largely changed when the inner porous structure is different. Resultantly, the pressure drop in the flow direction is changed at the interface of two different porous media. It is interesting to note that the friction factor in the uniform or non-uniform porous media is in good agreement with predicted value by Ergun equation.
- 社団法人 日本流体力学会の論文