CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   FLUENT (https://www.cfd-online.com/Forums/fluent/)
-   -   Dilute species rxn (https://www.cfd-online.com/Forums/fluent/118318-dilute-species-rxn.html)

entropies May 24, 2013 22:19
Dilute species rxn
 
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!

Liufeng_ustb May 26, 2013 00:41
Quote:
Originally Posted by entropies (Post 429905)
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


All times are GMT -4. The time now is 17:37.