Fig. 14
From: Geometric effects in the design of catalytic converters in car exhaust pipes
Case of profile in (a): Time evolution of the total fraction of unburnt gas, z(x,t), when linear joints between the various components are used. Curves are numbered according to various times: the blue line is the initial state, the black line the solution at the final time, T=1. At the end of the duct, x=L, the value of the fraction of unburnt gas, z(L,T), injected into the atmosphere can be read