Inlet function

Huski · February 12, 2013, 09:33

Hi all,

I'm trying to simulate the behavior of the abdominal aorta and I need of a inlet function that it changes with the radius like a target for archery or like concentric circles.
The inlet is a circle with the center in the origin of axis [0,0,0] and it is in the XZ plane. Screen.jpg

The inlet function is the velocity and I have the values in a chart.

I created an user function with an three dimensional interpolation (velocity,time, radius and Y value). Funcyion.jpg

After I created an expression called MyRad define of this expression:
sqrt((X Coordinate)^2+(Y Coordinate)^2) Expression.jpg

and a new variable called MYRAD.

After this I set up the new variable in the fluid domain and set up the inlet velocity in inlet boundary. Inlet_setting.jpg

I obtained a profile like in the picture Inlet.jpg

How can I do for obtain the right profile???

Thank you

Huski · February 12, 2013, 10:18

I found the solution there was a very banal error, but I don't know how to delete the post...
Thnk you all...

ghorrocks · February 12, 2013, 17:45

If you want me to I can delete the post, but it is better if you post a description of what the fix is so if people find it in future they can learn from it.

Huski · February 13, 2013, 04:59

In the expression I have made a very bad mistake, the inlet is in the plane XZ and the right expression is:

sqrt((X Coordinate)^2+(Z Coordinate)^2)

February 12, 2013, 09:33	Inlet function	#1
Huski New Member Luca Viaro Join Date: Nov 2012 Posts: 8 Rep Power: 13	Hi all, I'm trying to simulate the behavior of the abdominal aorta and I need of a inlet function that it changes with the radius like a target for archery or like concentric circles. The inlet is a circle with the center in the origin of axis [0,0,0] and it is in the XZ plane. Screen.jpg The inlet function is the velocity and I have the values in a chart. I created an user function with an three dimensional interpolation (velocity,time, radius and Y value). Funcyion.jpg After I created an expression called MyRad define of this expression: sqrt((X Coordinate)^2+(Y Coordinate)^2) Expression.jpg and a new variable called MYRAD. After this I set up the new variable in the fluid domain and set up the inlet velocity in inlet boundary. Inlet_setting.jpg I obtained a profile like in the picture Inlet.jpg How can I do for obtain the right profile??? Thank you

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February 12, 2013, 10:18		#2
Huski New Member Luca Viaro Join Date: Nov 2012 Posts: 8 Rep Power: 13	I found the solution there was a very banal error, but I don't know how to delete the post... Thnk you all...

February 12, 2013, 17:45		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,696 Rep Power: 143	If you want me to I can delete the post, but it is better if you post a description of what the fix is so if people find it in future they can learn from it.

February 13, 2013, 04:59		#4
Huski New Member Luca Viaro Join Date: Nov 2012 Posts: 8 Rep Power: 13	In the expression I have made a very bad mistake, the inlet is in the plane XZ and the right expression is: sqrt((X Coordinate)^2+(Z Coordinate)^2)