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-   -   How can I implement multistep reactions in CFX? (http://www.cfd-online.com/Forums/cfx/24327-how-can-i-implement-multistep-reactions-cfx.html)

Harry July 30, 2007 08:48

How can I implement multistep reactions in CFX?
 
I found some reduced multiple-step reactions for methane-air mixture. And I want to import it into CFX. But I do not know how can I achieve it.

Does anyone can help me?

Thanks-Harry

opaque July 30, 2007 12:14

Re: How can I implement multistep reactions in CFX
 
Dear Harry,

Have you looked at how ANSYS CFX does the multiple step reactions? Try using one of the provided mechanisms work, and copy/paste from there.

Opaque


Harry July 31, 2007 09:20

Re: How can I implement multistep reactions in CFX
 
Thanks, Opaque

I find several reaction mechanisms in CFX installation folder. Without NO formation, there are:

Methane Air WD1--one step;

Methane Air WD2--two steps;

Methane Air WGS--five steps;

Methane Air FLL STP

Right? Is there any limitation when using them?

If I have a reaction model, with several species and several reactions, how can I use it in CFX?

Thank you!


opaque July 31, 2007 10:58

Re: How can I implement multistep reactions in CFX
 
Dear Harry,

There is no chemical reaction import mechanism in CFX; therefore, you must type the CCL using the supplied mechanism as a template.

Look into your CFX installation directory for the file

etc/reactions-extra/REACTIONS-standard.ccl

The syntax of how to write your own mechanism is described.

Opaque



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