Can I alter the field static pressure using UDF?

anuarun · November 21, 2018, 05:39

Hello all,
I know that C_P(cell, thread) will call the local static pressure variable into the UDF for each cell. Is there any way by which I can alter the local static pressure? Something like a macro. For example, If I want to introduce a pressure correction in momentum equation, is there a way to do that with or without UDF?

obscureed · November 23, 2018, 03:51

Hi Anuarun,

Not really, not in Fluent. The Fluent solver is continually trying to get pressure and velocity to match, so it will fight against any unexplained variation to pressure. I think if you want to explore the details of solver numerics, OpenFOAM might be a better option.

Good luck!
Ed

anuarun · November 23, 2018, 05:17

Thank you Ed for your suggestion.

November 21, 2018, 05:39	Can I alter the field static pressure using UDF?	#1
anuarun New Member Anuja Vijayan Join Date: Mar 2017 Location: Thiruvananthapuram Posts: 23 Rep Power: 9	Hello all, I know that C_P(cell, thread) will call the local static pressure variable into the UDF for each cell. Is there any way by which I can alter the local static pressure? Something like a macro. For example, If I want to introduce a pressure correction in momentum equation, is there a way to do that with or without UDF?

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November 23, 2018, 03:51		#2
obscureed Senior Member Join Date: Sep 2017 Posts: 246 Rep Power: 11	Hi Anuarun, Not really, not in Fluent. The Fluent solver is continually trying to get pressure and velocity to match, so it will fight against any unexplained variation to pressure. I think if you want to explore the details of solver numerics, OpenFOAM might be a better option. Good luck! Ed

November 23, 2018, 05:17		#3
anuarun New Member Anuja Vijayan Join Date: Mar 2017 Location: Thiruvananthapuram Posts: 23 Rep Power: 9	Thank you Ed for your suggestion.