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Fields generated form functionObjects

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Old   May 16, 2022, 09:17
Default Fields generated form functionObjects
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Zeinab Abosedaira
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Hello all,
So I am trying to calculate the velocity magnitude at certain positions so I am using probes functionObject. Before this, I used mag functionObject to calculate the velocity magnitude.

Now, when I am trying to use the probe on the new field Umag, the functionObject doesn't actually recognize it. This made me think that there might be a difference between the original fields and the fields calculated from postProcessing. I am curious to know the difference between them if there is any.

Thank you so much!
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Old   May 17, 2022, 06:00
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Saleh Abuhanieh
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Hi,


The generated field by the functionOject "mag" is not registered in the memory like the ones you may see them inside the OpenFOAM solvers.


That's why the probs functionObject could not see it.


Regards,
Saleh
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Old   May 17, 2022, 17:14
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Zeinab Abosedaira
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Hello Saleh,
thank you for your reply. Since I am interested in OpenFOAM development. I was thinking about editing the mag function in order to register the field in the memory. I think it's going to be a good exercise. I need to understand how fields are added to the memory. If you can help me with explaining that or giving me a tutorial to watch or so. Thank you!
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Old   May 18, 2022, 13:44
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Saleh Abuhanieh
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Hi Zeinab,

You may check the objectRegistry documentation.

https://openfoamwiki.net/index.php/O...objectRegistry


The IOobject is used in all the OpenFOAM solvers. Check any createFields.H.

Then you may check the forces functionObject since the Cd and Cl can be used by another functionObjects.

I hope that was useful.

Regards,

Saleh
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