[liugx212]

Hi friends,

I am trying to get the plot of the case. After I used "foamJob buoyantFoam . hotRoom" and got computing result, but when I used the foamLog to plot, I was told as follows error, Could any friend do me a help?

Thanks a lot.

Error:
[liu@liu buoyantFoam]$ foamLog . hotRoom logFile
foamLog: Cannot read log logFile
or
[liu@liu buoyantFoam]$ foamLog . hotRoom log
foamLog: Cannot read log log

[hjasak]

Did you create the log file in the first place: this is the stuff that the solver writes on the screen (stored in a file). You should do somehing like

icoFoam <root> <case> | tee log

or similar: that will leave you a log file.


Hrv

[liugx212]

Hi Hrvoje Jasak,

Many thanks for your advice. I got some files in logs directory. But I also want to get the plot figure as your given on http://www.cfd-online.com/OpenFOAM_D...ages/1/17.html

Could you please give more advice?

Thanks again.

[hjasak]

Aha. Go to the logs directory and type

xmgrace Ux_0 Uy_0 p_0 k_0 epsilon_0

If you haven't got xmgrace, please install it - it will be one of the rpm packages or downloaded free off the web. You can then play with the legend and axes to get the picture you want.

Enjoy,

Hrv

[liugx212]

Hi Hrvoje Jasak,

Thanks so much. But I still have a question. I have some components such as p (pressure), rho (density) and T (temperature) etc which were defined in createFields file. But after running: icoFoam <root> <case> | tee log &
foamLog . hotRoom log. I only get some files as Ux_0 Uy_0 p_0 k_0 etc. Actually, I want to get the values for each components because I want to plot them with time. Could you please give some advice?

Thanks in advance.

[liugx212]

Hi friends,

Could you please give advice how to plot multi-component?

Thanks so much.

[fw407]

Hi everybody,

Sorry for digging out this old thread. I am also trying to make OF to plot the residual history for my case. As a test, I try to plot the residuarl history for plateHole. Afte having created the "logs" file, I cd into the "logs" directory and type

snail@snail-laptop:~/OpenFOAM/snail-1.3/run/tutorials/stressedFoam/plateHole/logs$ xmgrace UxFinalRes_0

I always get something like "xmgrace: Symbol `_XmStrings' has different size in shared object, consider re-linking" in the terminal, and there is not graph drawn in the grace. Does anybody know how to fix it?

(PS: I am using Ubuntu 7.10)

Thanks in advance!

feng

[olesen]

Looks like a mismatch in the motif versions.
If you try a plain "xmgrace" (without any arguments) and see the same error, you can be sure that it has nothing to do with OpenFOAM.

Take a look through Ubuntu or other Linux forums to see why the library and executable aren't matching.

[dmoroian]

It seems that your xmgrace software is not properly installed. Can you ran it at all?

Dragos

[fw407]

Hi Mark, Dragos,

Thanks for your quick reply!

I try a plain "xmgrace" and see the same error. There are some errors about compatibility in the process of installation,maybe "xmgrace" is not compatible with ubuntu 7.10.

Is there an alternative method of plotting the graph in OF?

feng