Flowfield temperature modification through UDF

Hypersonicflow · April 11, 2011, 05:27

Hello,

I would like to introduce myself to this forum as quite a newbie when it comes to FLUENT UDFs.

I would kindy ask some of you to give me a clue how to:

Modify the temperature during the run in any cell (not just at the inlet).
Example: loop over all cells and if the velocity in a cell is larger than five, increase the temperature by one.

From the UDF manual, it is not really clear to me which command has to be used for this purpose. Is it DEFINE_ADJUST or any other comand?

Please excuse the simple nature of this question, but I would be really thankful for a short hint.

Robert

Amir · April 11, 2011, 06:01

Hi there,
you can use DEFINE_ADJUST here. in selecting define macros, you have to notice when and where it executes during iterations. this macro executes every iterations and you can make a loop over all cells so it's suitable.

regards,

Hypersonicflow · April 18, 2011, 14:27

Thanks for your help, Armir - Problem solved.

Robert

April 11, 2011, 05:27	Flowfield temperature modification through UDF	#1
Hypersonicflow New Member Robert Join Date: Apr 2011 Posts: 7 Rep Power: 15	Hello, I would like to introduce myself to this forum as quite a newbie when it comes to FLUENT UDFs. I would kindy ask some of you to give me a clue how to: Modify the temperature during the run in any cell (not just at the inlet). Example: loop over all cells and if the velocity in a cell is larger than five, increase the temperature by one. From the UDF manual, it is not really clear to me which command has to be used for this purpose. Is it DEFINE_ADJUST or any other comand? Please excuse the simple nature of this question, but I would be really thankful for a short hint. Robert

April 18, 2011, 14:27	Thanks	#3
Hypersonicflow New Member Robert Join Date: Apr 2011 Posts: 7 Rep Power: 15	Thanks for your help, Armir - Problem solved. Robert

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April 11, 2011, 06:01		#2
Amir Senior Member Amir Join Date: May 2009 Location: Montreal, QC Posts: 735 Blog Entries: 1 Rep Power: 23	Hi there, you can use DEFINE_ADJUST here. in selecting define macros, you have to notice when and where it executes during iterations. this macro executes every iterations and you can make a loop over all cells so it's suitable. regards,