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Old   April 26, 2004, 21:00
Default Species Transfer !!! Top Top Urgent!!!
Mohammed Shamol
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Hi everybody,

I am working on 2D combustion chamber. The reaction that takes place inside the chamber is ch4 + o2 = co2 + h20. So my mixture is here ch4 and o2 ( reactant) and my product is co2 and h20. I know there are 4 species inside the chamber . But I need to see Carbon monooxide (Co) as a part of my species inside the chamber. Then what I did I copied Co from fluid instead of mixture coz there is no co in methane-air mixture. But surprisingly carbon monoxide ( Co) didnt show up inside the chamber.

Can anyone tell me how can I solve the problem ? I want to see Co inside the chamber.

Pls let me know earliest

Thank you

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Old   April 27, 2004, 02:16
Default Re: Species Transfer !!! Top Top Urgent!!!
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Dear Mohammed

It is not that if u include CO in Materials panel, it will come out as product. U have to model/include the corresponding reactions in the Reactions panel.

CH4+3/2O2 ->CO+2H2O

According to the rate and the model which u have chosen and also depends on stochiometry only, ur final product is decided. Try to include the above reaction and check whether u are getting CO. If u want both CO and CO2, include this

C+CO2* - > 2CO

I think this will solve ur problem

Regards Karthick

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Old   April 27, 2004, 03:20
Default Re: Species Transfer !!! Top Top Urgent!!!
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Use the two-step methane/air mixture when selecting the mixture in the species transport model. CO is a product of this mixture and should hopefully solve your problem.

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