asking usage of UDF in changing boundary condition

teguhtf · December 2, 2010, 01:03

Dear All,
I wanna simulate flow around building in FLUENT 6.2 .. By using unsteady option. the direction of wind change in some hours. so i must change my boundary condition ( as velocity inlet and then i change it as wall). How i can do that??
can I use UDF to solve my case??
Thanks
Teguhtf

ComputerGuy · December 3, 2010, 22:14

Teguhtf,

I assume that you have a box surrounding your building for the wind to flow, and also that one face of that box is where the wind enters.

If this is the case, it's quite simple to specify the x,y,and z components of the wind's velocity, and UDF's can be used to vary this velocity with time.

I hope this helps.

ComputerGuy

December 2, 2010, 01:03	asking usage of UDF in changing boundary condition	#1
teguhtf Senior Member teguh hady Join Date: Aug 2009 Location: Saga, Japan Posts: 222 Rep Power: 17	Dear All, I wanna simulate flow around building in FLUENT 6.2 .. By using unsteady option. the direction of wind change in some hours. so i must change my boundary condition ( as velocity inlet and then i change it as wall). How i can do that?? can I use UDF to solve my case?? Thanks Teguhtf __________________ Now Or Never!!! Last edited by teguhtf; December 2, 2010 at 01:14. Reason: repairing

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December 3, 2010, 22:14		#2
ComputerGuy Senior Member Real Name :) Join Date: Jan 2010 Location: United States Posts: 192 Rep Power: 16	Teguhtf, I assume that you have a box surrounding your building for the wind to flow, and also that one face of that box is where the wind enters. If this is the case, it's quite simple to specify the x,y,and z components of the wind's velocity, and UDF's can be used to vary this velocity with time. I hope this helps. ComputerGuy