Help:something about boundry condition

bright181 · January 4, 2011, 05:17

I have a problem: I want the boundry condition of a face to be a wall from 0 to 1s while the boundry condition to be a pressureinlet for 1s to 2s.(it's a 3d mesh)
Can I use udf to do this thing?
Thank you in advance.

fluentuser1 · January 5, 2011, 10:11

You could write a UDF that run every time step, and read the flow time. when you want to change the boundary then change the boundary. Maybe use the define adjust macro. I have not written UDF for several years and have forgotten the details. But I think this option is possible.

January 4, 2011, 05:17	Help:something about boundry condition	#1
bright181 New Member zhuliang Join Date: Nov 2010 Location: China Posts: 13 Rep Power: 16	I have a problem: I want the boundry condition of a face to be a wall from 0 to 1s while the boundry condition to be a pressureinlet for 1s to 2s.(it's a 3d mesh) Can I use udf to do this thing? Thank you in advance.

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January 5, 2011, 10:11		#2
fluentuser1 New Member Joey Join Date: Jan 2011 Posts: 6 Rep Power: 15	You could write a UDF that run every time step, and read the flow time. when you want to change the boundary then change the boundary. Maybe use the define adjust macro. I have not written UDF for several years and have forgotten the details. But I think this option is possible.