Anyone do reaction simulation in CFX??

Stein · June 27, 2009, 22:29

I am simulating reaction in CFX now?
There two ways to simulate reaction in CFX as follows:
1: Define source terms for mass fraction and energy equation
2: Use built-in FRC model in CFX to simulate directly.
But problem present,what the difference between these two methods.
First one seems to more complicated,cause it needs to edit source terms by CEL,but the sencod one dose not.
So ,I am puzzled about the second one, where is the sources term or how does CFX deal with source terms in this method.Cause by this way ,user does not need to define source terms manually.Why? I cant get it .

So,someone has similar experience and problem can help me explain this,thank you very much.

ghorrocks · June 28, 2009, 20:14

Hi,

Why not start with the tutorial examples - number 15 is reacting flow in a mixing tube and number 30 is coal combustion so they look like good starting points for you.

Glenn Horrocks

Stein · June 28, 2009, 21:20

I have practiced those two cases already,so I meet those two problem above.I want to know the theory by which CFX modeling reaction.It is also about Energy equation.
Which one I shoule use,thermal energy or total energy equation.I really stuck with that problem for a long time.

June 27, 2009, 22:29	Anyone do reaction simulation in CFX??	#1
Stein New Member Stein Join Date: Apr 2009 Location: Shanghai in China Posts: 11 Rep Power: 17	I am simulating reaction in CFX now? There two ways to simulate reaction in CFX as follows: 1: Define source terms for mass fraction and energy equation 2: Use built-in FRC model in CFX to simulate directly. But problem present,what the difference between these two methods. First one seems to more complicated,cause it needs to edit source terms by CEL,but the sencod one dose not. So ,I am puzzled about the second one, where is the sources term or how does CFX deal with source terms in this method.Cause by this way ,user does not need to define source terms manually.Why? I cant get it . So,someone has similar experience and problem can help me explain this,thank you very much.

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June 28, 2009, 20:14		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Hi, Why not start with the tutorial examples - number 15 is reacting flow in a mixing tube and number 30 is coal combustion so they look like good starting points for you. Glenn Horrocks

June 28, 2009, 21:20		#3
Stein New Member Stein Join Date: Apr 2009 Location: Shanghai in China Posts: 11 Rep Power: 17	I have practiced those two cases already,so I meet those two problem above.I want to know the theory by which CFX modeling reaction.It is also about Energy equation. Which one I shoule use,thermal energy or total energy equation.I really stuck with that problem for a long time.