# Discrete Data As Boundary Condition in CFX-Pre

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 November 10, 2011, 22:22 Discrete Data As Boundary Condition in CFX-Pre #1 Senior Member   Ashkan Javadzadegan Join Date: Sep 2010 Posts: 234 Rep Power: 7 Hi all, I have following discrete data of time dependent pressure distribution and I want to impose these discrete data as inlet boundary condition in CFX-Pre. I would be too pleased if anybody help me to do that. Time Pressure 016.54770.0117.88940.0219.67840.0322.8090.0429.51760.0538.46230.0645.17090.0746.95980.0848.74870.0950.53770.152.7739 Thank you very much. AshtonJ

 November 11, 2011, 01:33 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,795 Rep Power: 84 Use a 1D interpolation function.

November 12, 2011, 00:20
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Quote:
 Originally Posted by ghorrocks Use a 1D interpolation function.
Thanks for your kind reply. I tried to use 1D interpolation function, however, I was asked to enter the coordinate for each pressure value. I'd like to let you know that I have average pressure at each time interval. I mean, at different times, I have pressure values (a time dependent distribution) and don't have the coordinate. Please let me know what the coordinate is for my problem.
Thank you very much
AshtonJ

 November 13, 2011, 18:03 #4 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,795 Rep Power: 84 Coordinate? Then you used a 3D interpolation function. You need a 1D interpolation function.

 November 13, 2011, 21:46 #5 Senior Member   Ashkan Javadzadegan Join Date: Sep 2010 Posts: 234 Rep Power: 7 Image1 URL: http://imageshack.us/photo/my-images...nfunction.jpg/ Image2 URL: http://imageshack.us/photo/my-images/528/mydata.jpg/ Again thanks for your attention. I attached an image(1D interpolation Funcation.jpg) which shows that for 1D function, I need to specify the coordinate of each value. My data is also attached as an image. Please have a look and let me know how I can use the attached data as BC. Thank you very much AshtonJ

 November 14, 2011, 06:16 #6 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,795 Rep Power: 84 I see. In your case you define pressure as the result unit and time as the argument units. Then your coordinates are (time, pressure).

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