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Dear all,

I am using the standard solver rhoPorousSimpleFoam to model porous medium(catalyst converter) flow. I met one problem that I can not slolve. Hope anyone here give me some hints.

This is about adiabatic flow in one converter. The middle of the converter is catalyst, in which the flow is modeled with porous medium methodology.

I found that the outlet tempeature is increase by 20K compared with inlet temperature. But there is no energy input, all wall boundary is thermal adiabatic. When the flow resistance coef is decrease by 2 orders or there is no porous zone, results show temperature will not be increased. I summarize the question in one PPT file.

Any comments are appreciated. Thanks