[OpenFOAM] Integrate Variables using PAraFoam

nandiganavishal · April 16, 2009, 17:55

Hi,

I have a simple rectangular geometry and I have say three variables, C1,C2 and U. Now I would like to find the difference of C1 and C2 across the cross section, that is integrate (C1-C2) with respect to dy. similarly I would like to calculate the average velocity U across the cross the section i.e integrate U with respect to dy. I have the files of C1, C2 and U. How can I do this in OpenFoam (paraFoam).. Currently I am loading the data in matlab and then doing it but it looks a bit tedius as the data points generated from blockmesh are not uniform and further C1,C2, U files have values in the internal fields. Hence it is very difficult to integrate them across all the points using Matlab.. I would like to know how such things are can be implemented in openfoam,...

Kindly give your suggestions.

Thanks

Regards

Vishal

dmoroian · April 17, 2009, 04:54

Isn't IntegrateVariables filter in paraview, what you are asking for?

nandiganavishal · April 17, 2009, 13:38

Hi Dragos,

You are correct, I would like to use the integrate variables filter but I don't know how exactly I should use them.. Could you throw some light with regard to this... (as in give a short procedure)

Thanks

Regards

Vishal

April 16, 2009, 17:55	Integrate Variables using PAraFoam	#1
nandiganavishal Senior Member Vishal Nandigana Join Date: Mar 2009 Location: Champaign, Illinois, U.S.A Posts: 208 Rep Power: 18	Hi, I have a simple rectangular geometry and I have say three variables, C1,C2 and U. Now I would like to find the difference of C1 and C2 across the cross section, that is integrate (C1-C2) with respect to dy. similarly I would like to calculate the average velocity U across the cross the section i.e integrate U with respect to dy. I have the files of C1, C2 and U. How can I do this in OpenFoam (paraFoam).. Currently I am loading the data in matlab and then doing it but it looks a bit tedius as the data points generated from blockmesh are not uniform and further C1,C2, U files have values in the internal fields. Hence it is very difficult to integrate them across all the points using Matlab.. I would like to know how such things are can be implemented in openfoam,... Kindly give your suggestions. Thanks Regards Vishal

April 17, 2009, 04:54	IntegrateVariables	#2
dmoroian Senior Member Dragos Join Date: Mar 2009 Posts: 648 Rep Power: 20	Isn't IntegrateVariables filter in paraview, what you are asking for?

April 17, 2009, 13:38	integrate variables	#3
nandiganavishal Senior Member Vishal Nandigana Join Date: Mar 2009 Location: Champaign, Illinois, U.S.A Posts: 208 Rep Power: 18	Hi Dragos, You are correct, I would like to use the integrate variables filter but I don't know how exactly I should use them.. Could you throw some light with regard to this... (as in give a short procedure) Thanks Regards Vishal

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