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Old   April 10, 2002, 12:09
Default Postprocessing
  #1
Dimitris
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I have a circular cyinder in axial flow and I'm calculating the temp. and heat transfer coeff. on the cylinder walls. After the simulation I export result files with the coordinates, temp, yplus and heat transfer coefficient because I want to plot them, but I only want to plot from the middle of the cylinder front, across the circumference to the middle of the backside of the cylinder, so I need values in a straight line. Until now I've been using matlab so I can sort the different nodes and interpolating them in a straight line but I wonder if CFX post can give me the results right away in a straight line or if CFX post itself can make a graph with what I want!!! Any ideas or suggestions anyone?
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Old   April 10, 2002, 17:49
Default Re: Postprocessing
  #2
Astrid
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Define a text file containing:

- the number of points

- the x y z -coordinates

For example:


4
1 1 1
2 1 1
3 1 1
4 1 1


Read in the polyline.

Export the variables you want on the polyline.
The polyline does not have to be a line. It can be just a bunch of random numbers.

Astrid
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Old   April 10, 2002, 19:03
Default Re: Postprocessing
  #3
Dimitris
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Well....I don't want to seem too stupid but I didn't quite follow you...can you perhaps explain one more time?
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Old   April 10, 2002, 23:06
Default Re: Postprocessing
  #4
Robin
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Hi Dimitris,

Create a Plane in Post which cuts through your cylinder. Then create a Polyline by intersecting the cylinder boundary and the plane. You can then create a graph using the polyline you have created and the variable you wish to plot. Alternatively, you could export the data from the polyline to a file and plot it in the application of your choice.

Robin
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Old   April 11, 2002, 09:45
Default Re: Postprocessing
  #5
cfd guy
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You're not the first one with this kind of problem. You might take a look at this link:
http://www.cfd-online.com/Forum/cfx_....cgi?read=1838
This topic was already explored.
cfd guy
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