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Old   May 24, 2013, 22:19
Default Dilute species rxn
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Qi Guan
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Hi All,

I have a case of modelling a dilute species decomposition rxn in a heated tube reactor. The carrier gas is helium and constitutes 99.9% mole fraction of the incoming gas while the specie is the rest and can be called A. Under heating, reaction A -> B + C will happen. I want to use species transport + volume rxn to solve the problem.

My question is: when I define the mixture, should I define the list as:

A
B
C
helium

Should helium be one of the specie?


Thanks!
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Old   May 26, 2013, 00:41
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刘峰
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Quote:
Originally Posted by entropies View Post
Hi All,

I have a case of modelling a dilute species decomposition rxn in a heated tube reactor. The carrier gas is helium and constitutes 99.9% mole fraction of the incoming gas while the specie is the rest and can be called A. Under heating, reaction A -> B + C will happen. I want to use species transport + volume rxn to solve the problem.

My question is: when I define the mixture, should I define the list as:

A
B
C
helium

Should helium be one of the specie?


Thanks!
In my viewpoint, helium must be included. Becasue this can ensure mass conservation. FLUENT assume the mass fraction of the last species is 1-others. So in your mixture, you should include it.

Regards
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