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forceCoeffs plot error

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Old   April 29, 2019, 11:17
Default forceCoeffs plot error
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Joe lee
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Hi Foamers, I used pimpleFoam to simulate an external flow, then I used the command:
Code:
foamMonitor ./postProcessing/forceCoeffs1/0/forceCoeffs.dat
to plot my coefficients.
However, while my coefficient looks fine inside forceCoeffs.dat and log.pimpleFoam, the plot looks absolutely different from the data.
Here is the plot:

It seems all the value lies on the line only at time 0.

May I know how to fix this?

In case you need the whole case, I uploaded to google drive:
https://drive.google.com/open?id=1EO...XIBP5iN33xp3rW

Thank you very much!!
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Old   April 29, 2019, 12:52
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This is an axis scaling issue on the gnuplot script part.


Disable the auto scaling and use a manual one ranging for such as 0 < y < 1 for plotting...
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Old   April 29, 2019, 14:02
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Quote:
Originally Posted by mzzmrt View Post
This is an axis scaling issue on the gnuplot script part.


Disable the auto scaling and use a manual one ranging for such as 0 < y < 1 for plotting...
May I know how to set the scaling?
I am just simply typing in
Code:
foamMontion /.postProcessing/forceCoeffs1/0/forceCoeffs.dat
I am not using any script, so I don't know how to regulate the scaling .. Thanks
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Old   April 30, 2019, 06:58
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I seems you are using a tool named foamMonitor and it uses gnuplot for drawing graphs automatically. I have no idea what foamMonitor is doing anyway so you have dig in the code.
Or you can directly import the *.dat file into any spreadsheet software and draw the graph manually.
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Old   April 30, 2019, 12:42
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Joe lee
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Quote:
Originally Posted by mzzmrt View Post
I seems you are using a tool named foamMonitor and it uses gnuplot for drawing graphs automatically. I have no idea what foamMonitor is doing anyway so you have dig in the code.
Or you can directly import the *.dat file into any spreadsheet software and draw the graph manually.
Thank you. I think it will import it in spreadsheet then.
By the way, may I know if I have to use a script, how should I construct it? Is there any example coding? Thanks a lot!
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Old   May 8, 2019, 09:39
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This kind of scripting is easy. I guess this thread will help:


Tutorial of how to plot residuals !
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Old   May 11, 2019, 11:59
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Quote:
Originally Posted by mzzmrt View Post
This kind of scripting is easy. I guess this thread will help:


Tutorial of how to plot residuals !
Thanks a lot. I will look into it
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