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-   -   Surface weighted average (https://www.cfd-online.com/Forums/openfoam-post-processing/80320-surface-weighted-average.html)

 francois September 22, 2010 09:23

Surface weighted average

Hi all,

Is there an utility with openFOAM or Paraview to compute the surface weighted average of a quantity such as temperature:
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$T_{mean}=\frac{\int_{A}T\vec{u}.d\vec{A}}{\int_{A }\vec{u}.d\vec{A}}$

where $A$ is the surface area ( a plane here) and $\vec{u}$ the velocity field.

Any help could be useful.
Thanks !

 francois September 23, 2010 11:22

I've found something that could be used on patches:

http://openfoamwiki.net/index.php/Co...unctionObjects

but I have to calculate those values on arbitrary locations.
Any ideas ?

Thanks

 sebastian May 16, 2012 08:38

Hi Francois,

did you find a solution for that? I'm interested in something similar.

Sebastian

really late solution

So I'm guessing you probably sorted this out, but just for the sake of anyone else who is looking into this, I found this solution:

https://cmake.org/pipermail/paraview...st/013201.html

So if you integrate over a surface with the integrate variables filter and then divide by the total area that will give you an area weighted average

 elham usefi November 30, 2016 11:06

Quote:
 Originally Posted by seanread (Post 583161) So I'm guessing you probably sorted this out, but just for the sake of anyone else who is looking into this, I found this solution: https://cmake.org/pipermail/paraview...st/013201.html So if you integrate over a surface with the integrate variables filter and then divide by the total area that will give you an area weighted average
thank you. it saved me:D:)

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