Accessing particular faces

deji · January 19, 2012, 17:24

Greetings to all at the OpenFOAM forum.

If I have a set of faces set aside, let's say 10 of them in my computational domain and those faces are:

label neededFaces, how can I get flow quantities of those particular faces only? I already have a surfaceScalarField of my entire domain, but I only want these 10 to use someplace else....So how can I do that Foamers?

linnemann · January 19, 2012, 21:29

Hi

I would use foamToVTK -faceSet and use Paraview to access the data using a programmable filter or python calculator.

Then you have access to your data only in those 10 faces, and can calculate your desired stuff.

http://www.vtk.org/Wiki/Python_Programmable_Filter

http://www.itk.org/Wiki/Python_Calculator

deji · January 19, 2012, 21:49

Thanks for the reply Niels. But I need those quantities for an LES wall function that I am implementing into OpenFOAM, so they are required at runtime. Any ideas? Thanks.

linnemann · January 19, 2012, 21:58

Hi

Well it didnt say it had to be runtime

I havent looked into the coding of it but just as MRFSimpleFoam operates on a faceSet/cellSet it must be possible to see how the Coriolis force is added to the faces/cells and then reusing that for your wall function.

deji · January 19, 2012, 22:02

Thanks much Niels, I am going to look into the code myself.

Cheers,
Deji

deji · January 20, 2012, 15:27

I do not think that solver is in OpenFOAM anylonger, atleast not in OpenFOAM-1.7. Do you know what version has the code?

linnemann · January 23, 2012, 03:43

For 1.7.x its in the tutorials/incompressible/MRFSimpleFoam/MRFSimpleFoam folder

For 2.x versions its in the regular place for solvers.

January 19, 2012, 17:24	Accessing particular faces	#1
deji Senior Member n/a Join Date: Sep 2009 Posts: 199 Rep Power: 17	Greetings to all at the OpenFOAM forum. If I have a set of faces set aside, let's say 10 of them in my computational domain and those faces are: label neededFaces, how can I get flow quantities of those particular faces only? I already have a surfaceScalarField of my entire domain, but I only want these 10 to use someplace else....So how can I do that Foamers?

January 19, 2012, 21:29		#2
linnemann Senior Member Niels Nielsen Join Date: Mar 2009 Location: NJ - Denmark Posts: 556 Rep Power: 27	Hi I would use foamToVTK -faceSet and use Paraview to access the data using a programmable filter or python calculator. Then you have access to your data only in those 10 faces, and can calculate your desired stuff. http://www.vtk.org/Wiki/Python_Programmable_Filter http://www.itk.org/Wiki/Python_Calculator __________________ Linnemann PS. I do not do personal support, so please post in the forums.

January 19, 2012, 21:58		#4
linnemann Senior Member Niels Nielsen Join Date: Mar 2009 Location: NJ - Denmark Posts: 556 Rep Power: 27	Hi Well it didnt say it had to be runtime I havent looked into the coding of it but just as MRFSimpleFoam operates on a faceSet/cellSet it must be possible to see how the Coriolis force is added to the faces/cells and then reusing that for your wall function. __________________ Linnemann PS. I do not do personal support, so please post in the forums.

January 23, 2012, 03:43		#7
linnemann Senior Member Niels Nielsen Join Date: Mar 2009 Location: NJ - Denmark Posts: 556 Rep Power: 27	For 1.7.x its in the tutorials/incompressible/MRFSimpleFoam/MRFSimpleFoam folder For 2.x versions its in the regular place for solvers. __________________ Linnemann PS. I do not do personal support, so please post in the forums.

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January 19, 2012, 21:49		#3
deji Senior Member n/a Join Date: Sep 2009 Posts: 199 Rep Power: 17	Thanks for the reply Niels. But I need those quantities for an LES wall function that I am implementing into OpenFOAM, so they are required at runtime. Any ideas? Thanks.

January 19, 2012, 22:02		#5
deji Senior Member n/a Join Date: Sep 2009 Posts: 199 Rep Power: 17	Thanks much Niels, I am going to look into the code myself. Cheers, Deji

January 20, 2012, 15:27		#6
deji Senior Member n/a Join Date: Sep 2009 Posts: 199 Rep Power: 17	I do not think that solver is in OpenFOAM anylonger, atleast not in OpenFOAM-1.7. Do you know what version has the code?