Transient Velocity Inlet for an airfoil !

Titasse · May 10, 2010, 17:17

Hi,

I am trying to simulate the flow around an airfoil with an oscillating velocity inlet. I wanna keep constant the velocity's value (10m/s) but modify the angle of attack [-8deg ; 8deg]

I used the tutorial about the Transient Velocity Inlet Profile for Flow in a Tube (http://202.118.250.111:8080/fluent/F...df/node230.htm).

So, i created two different files, one for the unsteady in x-direction and the other for the y-direction. The thing is, i can select only one file under Fluent.

If someone, would be able to help me.

Cheers,

Titasse

skris2009 · May 11, 2010, 01:53

You need to read in 2 different vel profiles.
After doing this, when you set ur vel boundary condition, select 'components' and you can choose each of the vel profiles.
Hope this helps.

Titasse · May 11, 2010, 12:13

It is what i do, but i can compilate only one UDF file each time.
For exemple, i compilated the file in x-direction, i setted up in BC for x and after that i compilated the file in y-direction but my BC for x vanished.

Thank you for your help.

Titasse

skris2009 · May 12, 2010, 12:06

I'm not too sure if what you are saying is right, coz I've complied multiple UDFs for a single case file.
Since you just need a velocity profile, instead of a UDF can you use read a profile file? (Read-> Profile) Coz this I know for sure works. See Fluent manual for the profile file format.
Hope this helps.

May 10, 2010, 17:17	Transient Velocity Inlet for an airfoil !	#1
Titasse New Member Maxime Join Date: Apr 2010 Posts: 19 Rep Power: 16	Hi, I am trying to simulate the flow around an airfoil with an oscillating velocity inlet. I wanna keep constant the velocity's value (10m/s) but modify the angle of attack [-8deg ; 8deg] I used the tutorial about the Transient Velocity Inlet Profile for Flow in a Tube (http://202.118.250.111:8080/fluent/F...df/node230.htm). So, i created two different files, one for the unsteady in x-direction and the other for the y-direction. The thing is, i can select only one file under Fluent. If someone, would be able to help me. Cheers, Titasse

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
VOF Volume fraction in Velocity inlet	aruelle	FLUENT	2	May 10, 2024 11:17
UDF inlet velocity profile mismatch with Fluent	ChristineL	Fluent UDF and Scheme Programming	15	November 25, 2016 07:45
Problem with assigned inlet velocity profile as a boundary condition	Ozgur_	FLUENT	5	August 25, 2015 05:58
time varying inlet velocity	Zhe Liu	CFX	0	July 31, 2008 07:56
velocity more than INLET velocity	neu	FLUENT	3	May 13, 2003 05:56

May 11, 2010, 01:53		#2
skris2009 New Member Sowmya K Join Date: Nov 2009 Posts: 22 Rep Power: 17	You need to read in 2 different vel profiles. After doing this, when you set ur vel boundary condition, select 'components' and you can choose each of the vel profiles. Hope this helps.

May 11, 2010, 12:13		#3
Titasse New Member Maxime Join Date: Apr 2010 Posts: 19 Rep Power: 16	It is what i do, but i can compilate only one UDF file each time. For exemple, i compilated the file in x-direction, i setted up in BC for x and after that i compilated the file in y-direction but my BC for x vanished. Thank you for your help. Titasse

May 12, 2010, 12:06		#4
skris2009 New Member Sowmya K Join Date: Nov 2009 Posts: 22 Rep Power: 17	I'm not too sure if what you are saying is right, coz I've complied multiple UDFs for a single case file. Since you just need a velocity profile, instead of a UDF can you use read a profile file? (Read-> Profile) Coz this I know for sure works. See Fluent manual for the profile file format. Hope this helps.