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Center for Nonlinear Studies |
Recently, a diesel particulate filter (DPF) has been developed to trap particulate matters (PM) including soot in the after-treatment of exhaust gas. To construct better design and geometry of DPF for improving the filter efficiency, we need to examine the flow and pressure profiles in ceramic filter. However, it is difficult to conduct measurements inside the filter, and parameters evaluated by experiments are limited. In this study, we have conducted Lattice Boltzmann simulation on flow in porous media. To obtain the complex structure of filter with small pore size, we have numerically formed porous media based on self-aggregated fluids. Then, we have simulated flow with particles in porous filter. Flow change and pressure drop across the filter have been discussed. The chemical reaction is also included to consider the particle burning in the filter regeneration process.