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-   -   Volume average of a scalar? (https://www.cfd-online.com/Forums/fluent/83588-volume-average-scalar.html)

mecarlg January 4, 2011 13:30

Volume average of a scalar?
 
Hello,

Can anybody help me with this please? I have a flow field with one volume and I want to calculate the volume averaged scalar concentration in a sub-volume.

It is easy to do for the whole volume (report->volume integrals) but how do you create a sub-volume not part of the mesh file? You can only create points, lines and surfaces in the Fluent GUI, any tricks for creating a volume?

I have released the scalar from a sub-volume using a UDF but I'm having difficulty calculating the scalar concentration in other sub-volumes. I do have other models with the volumes decomposed already but its not very efficient if you need to know a volume average somewhere else.

Any help is much appreciated.

Carlos.


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