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Old   August 11, 2011, 01:29
Post Result file Help
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kid
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Hello All,

How do i extract value from result files in time stamp from OpenFOAM??

a cylinder flow was solved now i want to plot pressure around cylinder at all angles
at a particular distance. But i do not know how to extract the pressure value from "p" file.

Cheers
CFDkid

Last edited by kid; August 11, 2011 at 07:40. Reason: no response till now
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Old   August 11, 2011, 07:41
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kid
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Can you people help me please ?
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Old   August 11, 2011, 09:42
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David Gaden
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Hey kid,

You can used Paraview to visualize your data. I believe it has data extraction functionality, but I haven't used it. You can use OpenFOAM's "sample" application. I think you need to add a sampleDict file to your constant directory to use it. sample extracts data from a set of points, or a plane. You can also export OpenFOAM data to other post processors, such as Techplot.

I don't know much more... I'm more into solver development!

-Dave
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Old   August 11, 2011, 10:53
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hi kid,

you could use the writeCellCentres utility to get the xyz coordinates of the points, your p data is calculated

tobi
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Old   August 12, 2011, 02:20
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kid
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@Dave

Thank you will try sampleDict option

Quote:
Originally Posted by marupio View Post
Hey kid,

You can used Paraview to visualize your data. I believe it has data extraction functionality, but I haven't used it. You can use OpenFOAM's "sample" application. I think you need to add a sampleDict file to your constant directory to use it. sample extracts data from a set of points, or a plane. You can also export OpenFOAM data to other post processors, such as Techplot.

I don't know much more... I'm more into solver development!

-Dave
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Old   August 12, 2011, 02:22
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kid
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@tobi,
Well tried it from case directory, but it generated data for all the time step and cx,ccy,ccz
what are these files ?
Can i use it for getting data for particular cell ?

Cheers
CFDkid

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Originally Posted by flotob View Post
hi kid,

you could use the writeCellCentres utility to get the xyz coordinates of the points, your p data is calculated

tobi
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Old   August 30, 2011, 05:00
Thumbs up Para Inspector to spot values in given cell
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kid
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Hello everyone,
Q: How to get values at particular location from result files of OpenFOAM?
A: ParaView comes with a python tool called Para Inspector. First open the OpenFOAM solved case in ParaView. Now to under View option and check the "para Inspector"
It asks for X,Y,Z co ordinates of the spot one wants to get or fetch values. One can also select between range of variables for which the values are computed. Next Zoom in at the spot and you will find the computed value.

Following links are useful in the above regard:

http://www.vtk.org/Wiki/Data_Selection

Cheers,
CFDkid
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Old   August 30, 2011, 05:06
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Joel Lehikoinen
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Quote:
Originally Posted by kid View Post
Hello everyone,
Q: How to get values at particular location from result files of OpenFOAM?
A: ParaView comes with a python tool called Para Inspector. First open the OpenFOAM solved case in ParaView. Now to under View option and check the "para Inspector"
It asks for X,Y,Z co ordinates of the spot one wants to get or fetch values. One can also select between range of variables for which the values are computed. Next Zoom in at the spot and you will find the computed value.

Following links are useful in the above regard:

http://www.vtk.org/Wiki/Data_Selection

Cheers,
CFDkid
To obtain data values at single points, you can also use the probeLocations utility. For an example of probesDict, see $FOAM_TUTORIALS/postProcessing/sampling/probeLocations/probesDict.
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Old   August 30, 2011, 07:11
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kid
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Hello,
Will try it soon.

Cheers,
CFDkid
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