Problem Description

The catalytic converter modeled here is shown in Figure  8.1. The nitrogen flows through the inlet with a uniform velocity of 22.6 m/s, passes through a ceramic monolith substrate with square shaped channels, and then exits through the outlet.

Figure 8.1: Catalytic Converter Geometry for Flow Modeling

While the flow in the inlet and outlet sections is turbulent, the flow through the substrate is laminar and is characterized by inertial and viscous loss coefficients along the inlet axis. The substrate is impermeable in other directions, which is modeled using loss coefficients whose values are three orders of magnitude higher than in the main flow direction.