udf, help plz

aminepoxnet · July 16, 2012, 20:06

I have a question,
can we make a boundary condition like pressure inlet, stable by UDF? my boundary pressure increases every time step and I want to make it not to increase and be stable.
thanks a lot for your attention and help

flotus1 · July 17, 2012, 03:14

If the pressure at your pressure inlet boundary condition rises although you provided a constant value in the fluent setup, then there is something wrong with the rest of the setup.
A UDF for pressure won't solve this problem.

aminepoxnet · July 17, 2012, 08:17

thank for your help
do you know which setups would make this problem?

flotus1 · July 17, 2012, 08:41

Since I know nothing about the setup, I don't know what could cause the error.

July 16, 2012, 20:06	udf, help plz	#1
aminepoxnet New Member amin masumi Join Date: Jul 2012 Posts: 17 Rep Power: 14	I have a question, can we make a boundary condition like pressure inlet, stable by UDF? my boundary pressure increases every time step and I want to make it not to increase and be stable. thanks a lot for your attention and help

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July 17, 2012, 03:14		#2
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,427 Rep Power: 49	If the pressure at your pressure inlet boundary condition rises although you provided a constant value in the fluent setup, then there is something wrong with the rest of the setup. A UDF for pressure won't solve this problem.

July 17, 2012, 08:17		#3
aminepoxnet New Member amin masumi Join Date: Jul 2012 Posts: 17 Rep Power: 14	thank for your help do you know which setups would make this problem?

July 17, 2012, 08:41		#4
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,427 Rep Power: 49	Since I know nothing about the setup, I don't know what could cause the error.