A computational fluid dynamics model was used to simulate the flow field of catalytic converter, and which was compared with the experimental results as to demonstrate the model validation.

The more evenly distributed the fluid entering the carrier of catalytic converter in the exhaust pipe, the better results of catalysis and transformation can be got.

A two-dimension model for the flow field in catalytic converter was established, and the steady state flow was simulated with the computational fluid dynamics (CFD) code.