Calculate volume average of volScalarField

tangd · August 21, 2006, 10:21

One easy question. How to calculate volume average of a volScalarField? I think the average() is not the function I want. Can somebody tell me? Thanks!

gschaider · August 21, 2006, 11:38

That's the problem with easy questions. Nobody wants to answer them because you can only embarrass yourself by saying somthing stupid.

Nevertheless:

sum(mesh.V()*myField)/sum(mesh.V())

(weighted average of the cell-values)

hjasak · August 21, 2006, 11:49

volScalarField a = ...;

a.weightedAverage(mesh.V());

Hrv

sam1364 · May 1, 2013, 14:37

so, what about surface average of a scalar field at specified boundary patch (like inlet)

how can I include that in my source code?

Quote:

Originally Posted by hjasak

volScalarField a = ...;

a.weightedAverage(mesh.V());

Hrv

August 21, 2006, 10:21	One easy question. How to calc	#1
tangd Member Dihao Tang Join Date: Mar 2009 Posts: 78 Rep Power: 17	One easy question. How to calculate volume average of a volScalarField? I think the average() is not the function I want. Can somebody tell me? Thanks!

August 21, 2006, 11:38	That's the problem with easy q	#2
gschaider Assistant Moderator Bernhard Gschaider Join Date: Mar 2009 Posts: 4,225 Rep Power: 51	That's the problem with easy questions. Nobody wants to answer them because you can only embarrass yourself by saying somthing stupid. Nevertheless: sum(mesh.V()*myField)/sum(mesh.V()) (weighted average of the cell-values) Luttappy, alainislas, openfoam_aero and 2 others like this. __________________ Note: I don't use "Friend"-feature on this forum out of principle. Ah. And by the way: I'm not on Facebook either. So don't be offended if I don't accept your invitation/friend request

August 21, 2006, 11:49	volScalarField a = ...; a	#3
hjasak Senior Member Hrvoje Jasak Join Date: Mar 2009 Location: London, England Posts: 1,907 Rep Power: 33	volScalarField a = ...; a.weightedAverage(mesh.V()); Hrv lpz456 likes this. __________________ Hrvoje Jasak Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk

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