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Old   April 19, 2009, 21:00
Question CGNS for Tecplot
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Jacopo Biasetti
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Hi guys!

In a transient simulation, if you ask CFX to create CGNS output files, it does it but creates one file each timestep. So if I have 5 timestep I will have 5 files.
But Tecplot to work with unsteady simulations wants all the timesteps in one single CGNS file.
Do you know if exists a small program/code that can put together all the CGNS files in order to work with Tecplot?

Cheers
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Old   April 27, 2009, 11:45
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Check out the NASA GRC CGNS utlities (I personally use plot3d_to_cgns)

http://www.grc.nasa.gov/WWW/cgns/cgn...ies/index.html
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Old   April 29, 2009, 17:28
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Jacopo Biasetti
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Thanks man!

I feel stupid but... I don't know how to use it. I mean... I don't know how to use the cgnstools, since it requires also tcl... could you tell what I have to do?

Cheers

J
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Old   April 30, 2009, 08:14
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From what I understand, either Linux or Windows, all executables need to be ran from the command line. Since I have a Windows machine here, I start up cmd.exe and navigate to where the executable is.

If I do a
plot3d_to_cgns -help

Then I get all the required arguments and options. So, to actually do my plot3d to cgns conversion, my particular command is

./> plot3d_to_cgns -fc grid.fast flow.fast output.cgns

Where -f means formatted text, and -c means convert to primitive variables. After you install just navigate to the folder and do a help on the function to see whats required.
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Old   June 22, 2010, 11:35
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Mimou
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Hi minger,

How could install CGNS ? I'm using a VS .NET 2003 with f90. Thanks in advance.
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Old   November 4, 2010, 05:15
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Hamza Motiwala
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Hello,

I am new to this forum. Since the discussion was about CGNS, I thought of making a relevant request .I am looking for a working sample C program that can read and write data from an unstructured grid file in CGNS Format. Can anyone help me out with this problem please. Will really appreciate the help.

Thanks
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