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how to output reslut along multiple lines

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Old   December 15, 2017, 03:49
Default how to output reslut along multiple lines
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Bingchuan
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Hi,

As we know, we can output results along a line using function singleGraph. We can define the start and end points in it. My question is how to output the results along multiple lines? Can I modify the singleGraph file like:
.....
start (x11, y11,z11);
end (x12,y12,z12);
fileds (U p);

start (x21,y21,z21);
end (x22,y22,z22);
fileds (U p);
...
where (x1i, y1i, z1i) are the start and end of the first line, (x2i, y2i, z2i) are the start and end of the second line.

Thanks.

Bingchuan

Last edited by bingchuan; December 19, 2017 at 03:47.
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Old   December 15, 2017, 08:50
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Just extract the data of 2 different plots in .csv file and then import in excel. In excel, you can combine both the graphs in a single figure.

Regards,
Rajan
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Old   December 15, 2017, 10:51
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Bruno Lebon
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This is the sort of thing that can be easily implemented in Python. Read the outputs from multiple line graphs and concatenate them.
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Old   December 19, 2017, 03:39
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Thanks Rajan.
Thanks Bruno.

Sorry, I didn't clarify my question clearly.

I was doing an unsteady simulition. Since the computational dimain is three dimensional, so I am going to write the results of the whole computional domain in large time interval. But the results along some lines need to be monitored during small time interval (e.g. line 1 and 2 in the sketch). So it is improssblie to extract data from the whole domain like Rajan said.

I planed to use the function objects singleGraph included by the "casedir/system/controlDict" , i.e.
...
funcitons
{
#includeFunc singleGraph
}
...
as recommend by https://cfd.direct/openfoam/user-gui...hs-monitoring/.

It works when sampling data along a line. However, I don't know how to sample data along a few lines just like line 1 and 2 in the sketch above.

Bests,
Bingchuan
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Old   December 19, 2017, 03:42
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Sorry, I failed to upload the sketch.

You can go to https://pan.baidu.com/s/1dEP3X7N
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Old   December 19, 2017, 04:23
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You need two simpleGraphs in your system directory. Just rename the template files to different file names, for example simpleGraph1 and simpleGraph2 and then include them in the controlDict.

functions
{
#includeFunc singleGraph1
#includeFunc singleGraph2
}
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Old   December 19, 2017, 05:48
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Quote:
Originally Posted by blebon View Post
You need two simpleGraphs in your system directory. Just rename the template files to different file names, for example simpleGraph1 and simpleGraph2 and then include them in the controlDict.

functions
{
#includeFunc singleGraph1
#includeFunc singleGraph2
}
It works.
Thank you Bruno.

Bests,
Bingchuan
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Old   September 16, 2020, 11:08
Default fatal error with singleGraph1
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I used the @blebon strategy but singleGraph1 is not a "type" that is allowed. Therefore, it is a fatal error.

@Bingchuan you succeeded is your task?

I'm trying to do the same thing.
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