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Reaction simulation in Fluent

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Old   February 1, 2013, 20:24
Default Reaction simulation in Fluent
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Ankur
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Do I need to use UDF (user-defined function) if I have 2 different reactions taking place in different zones in my model. [In my model there is a tube through the center of a Furnace in which combustion occurs. A different reaction takes place inside the tube which uses the heat released by combustion in the furnace]. So, will I need to define a UDF for the reaction in the tube or Fluent allows doing this without using a UDF ?

Someone plz help.
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Old   February 1, 2013, 22:38
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Ernesto
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Quote:
Originally Posted by ankur_kr View Post
Do I need to use UDF (user-defined function) if I have 2 different reactions taking place in different zones in my model. [In my model there is a tube through the center of a Furnace in which combustion occurs. A different reaction takes place inside the tube which uses the heat released by combustion in the furnace]. So, will I need to define a UDF for the reaction in the tube or Fluent allows doing this without using a UDF ?

Someone plz help.
No, you can easily enable different reactions in different zones via the boundary conditions panel (wall reactions) or in the cell zone panel ( reactions in a fluid zone).

No need for UDF
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Old   February 2, 2013, 01:44
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Hey thnx
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Old   May 28, 2013, 17:51
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Ankur
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Hi Ernesto,
When I try to run my simulation with 2 different reaction (mechanism) in different regions, I get the following error,

"ISAT cannot be used with two different gas phase mechanisms" .

Do you have any idea about how to overcome this problem ?
I tried to use 'Direct Integration' instead of 'ISAT' using the 'Integration Parameters' dialog box, but the problem persists.

Plz help.
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