Hello, I am trying to simulate a chemical reactor heat exchanger with two mixtures of components. So, I have two channels, each with a mixture of different species and a wall. In the wall there are an endothermal surface reaction in one side and an exothermal surface reaction in other side. My problem is to define the two mixtures and to associate it to each channel. Fluent don't allow to define more than one mixture. Do you have any idea to solve this problem? With thanks in advance for your attention, Jorge

If you are using FLuent version of 6.2.16, you can do by defining the mixtures in the user defined database.

Dear Shanti, Thanks for your reply. I think I solved the problem, I have one mixture with all species and several reactions and mechanisms associated to the channels. Now I have another problem in simulate the wall catalytic combustion. The temperature contours is near constant and if I turn on the heat surface reactions in species model menu I get divergence (Gauss_Elimination: singular matrix). Jorge

[MASOUD]

Originally Posted by Jorge Facao
;130634

Hello, I am trying to simulate a chemical reactor heat exchanger with two mixtures of components. So, I have two channels, each with a mixture of different species and a wall. In the wall there are an endothermal surface reaction in one side and an exothermal surface reaction in other side. My problem is to define the two mixtures and to associate it to each channel. Fluent don't allow to define more than one mixture. Do you have any idea to solve this problem? With thanks in advance for your attention, Jorge

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Hi there,
Do you mind if I ask you a question for defining two different mixtures in one geometry?
Masoud