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Optimization of Diesel Particulate Filter Using Composite Geometry by CFD Analysis

Vijayaraj.J, Dr. Swaminathan. M R

Existing research data suggests a variation in the soot thickness along the wall-flow filters of the DPF i.e. the soot cake thickness was uneven along the length(X-axis) of the channel. This project endeavors to explore the possibility of altering the geometry of the DPF filter and hence improve regeneration by achieving a normalised soot formation. A computational, three-dimensional approach to investigate the behavior of diesel soot particles in the micro-channels of a wall-flow, porous-ceramic particulate filter is presented. The flow field is simulated with a finite volume method. Darcy’s law was used to model the porous material. The permeability was obtained by fitting experimental data namely Inlet Velocity, Exit Pressure, mass flow rate and density At this stage the effort is focused on mainly reconstructing the soot formation on the walls of the filter. The pressure drop across the channel was taken a reference value for validating the CFD model. A commercial CFD Software FLUENT R15.0 is used to analyze the soot deposition process and results to be compared with that of conventional experimental data available