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How to create a USER (planar) SURFACE

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Old   May 27, 2015, 11:43
Default How to create a USER (planar) SURFACE
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Hello!
I'm trying (unfortunately without any success so far) to create a "user surface" in CFX-Post.
I've read the manual at page 103 (ANSYS CFX 15), but cannot understand the concept of "connectivity". Is there someone who could write down an example of a user plane surface made up of 2 faces each one of which formed by 4 points so that I can finally understand the syntax?

Thanks, thanks so much
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Old   May 27, 2015, 15:12
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Sure - draw a picture of what you want and we can try to help.
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Old   May 27, 2015, 17:34
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Here is how you get one to understand the file structure.

Load your definition/results file into CFD-Post

Create a plane by any method

Go to File/Export

Select the plane you just created and export to a .csv file. Do not forget to include the connectivity setting, so you can get the "[Faces]" block in the file.

Open the .csv file and notice/compare with the description in the documentation.
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Old   May 28, 2015, 03:49
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Quote:
Originally Posted by RicochetJ View Post
Sure - draw a picture of what you want and we can try to help.
Thanks so much for your help! I take a second to try opaque's advice
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Old   May 28, 2015, 04:40
Default The points
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Quote:
Originally Posted by RicochetJ View Post
Sure - draw a picture of what you want and we can try to help.
UPDATE!!!
These are the points requested:
Face 1
P1 = (400,-400)
P2 = (0,-400)
P3 = (0,-700)
P4 = (400,-700)

Face 2
P1 = (0,-400)
P2 = (-400,-400)
P3 = (-400,-700)
P4 = (0,-700)

Thanks again
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Old   May 8, 2020, 14:54
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As described before, I have created a user surface in CFX POST and exported it to a .csv file. Now I want to create a user surface in CFX PRE. Therefore, i have imported the .csv file, but I get the following error:





ERROR
Error detected when trying to read data from the file for '/LIBRARY/USER LOCATION DEFINITIONS/USER SURFACE:User Surface 1':

Invalid format in file '....', line 5.
After reading name of profile data set, saw '[Data]' section heading.
Expected to read: '[Reference CoordFrame]' section heading, '[Parameters]' section heading, or '[Spatial Fields]' section heading.






How can I solve this problem? I need that surface in CFX PRE.
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Old   May 8, 2020, 15:25
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I found a solution on my own. In CFX POST export select:


Type --> BC Profil


Profil Type --> Custom


Activate Face Connectivity
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Old   June 16, 2020, 02:37
Default Another solution.
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Quote:
Originally Posted by _CFXPost.book.pdf/Ref_PostCCLAppendix.pdf
USER SURFACE : Allows the user to read an external file while contains elements describing a
general 3D surface, with local variable values optionally specified on each node. The surface
can interact with CFD data and can be coloured using local variables or domain variables.

I suppose that the User surface was designed to receive information from other software results. So I thought that I could create a fake and quick simulation with the similar mesh but just with surface I want to show the result.

It works for me, see the following pictures for the summarized procedure.


01_the original model.




02_Fake Model to obtain the modified mesh and exporting:



03_The original model, importing the modified mesh surface



04_Surface loaded.






05_Sowing the surface only


06_ Showing results in the User Surface
Attached Images
File Type: png 01_original.png (104.4 KB, 156 views)
File Type: png 02_fakeExport.png (91.3 KB, 151 views)
File Type: png 03_import.png (146.5 KB, 151 views)
File Type: png 04_fakeloaded.png (97.0 KB, 148 views)
File Type: png 05_show surface only.png (71.8 KB, 147 views)
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Last edited by camposrf; June 26, 2020 at 02:35. Reason: adding pictures
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Old   June 26, 2020, 03:12
Default 06_ Showing results in the User Surface
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Quote:
Originally Posted by camposrf View Post
06_ Showing results in the User Surface
I had to post an additional comment to show the last picture.


06_ Showing results in the User Surface
Attached Images
File Type: png 06_showresoults.png (68.2 KB, 143 views)
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Last edited by camposrf; June 26, 2020 at 03:14. Reason: Adding picture
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