Point Interpolation
Hi all,
is there a class to interpolate a vector or a scalar from the cells faces to the cells points or directly from the cell centers to the cells points? For example, How to get the gradient of a given quantity defined at the cells points? thanks andrea |
If you are using 1.6-extend, it is available in the volPointInterpolation class.
See a snippet here: http://openfoamwiki.net/index.php/Op...tInterpolation I can't find the class in 1.7.1, so I'm not sure where it went. |
Hi David,
thanks for reply! I have already tried volPointInterpolation, but without success:(! In OF 1.7.1 is under src/finiteVolume/interpolation/volPointInterpolation. I tried something like: volVectorField gradA = fvc::grad(alpha1); pointVectorField gradC = volPointInterpolate::interpolate(gradA); maybe is not the correct syntax...Do you know which is the correct one to call this class? thanks again andrea |
try volPointInterpolation::interpolate
I've never actually used it, though... |
Hi, sorry for the late response. Thanks for your help. I still get an error:
now i simply write pointScalarField alphaC = volPointInterpolation::interpolate(alpha1_); fo get the alpha values on the vertices. Here the error: Making dependency list for source file interfaceProperties.C SOURCE=interfaceProperties.C ; g++ -m64 -Dlinux64 -DWM_DP -Wall -Wextra -Wno-unused-parameter -Wold-style-cast -Wnon-virtual-dtor -O3 -DNoRepository -ftemplate-depth-40 -I/opt/OpenFOAM/OpenFOAM-1.7.1/src/finiteVolume/lnInclude -IlnInclude -I. -I/opt/OpenFOAM/OpenFOAM-1.7.1/src/OpenFOAM/lnInclude -I/opt/OpenFOAM/OpenFOAM-1.7.1/src/OSspecific/POSIX/lnInclude -fPIC -c $SOURCE -o Make/linux64GccDPOpt/interfaceProperties.o interfaceProperties.C: In member function ‘void Foam::interfaceProperties::calculateK()’: interfaceProperties.C:152: error: cannot call member function ‘Foam::tmp<Foam::GeometricField<Type, Foam::pointPatchField, Foam::pointMesh> > Foam::volPointInterpolation::interpolate(const Foam::GeometricField<Type, Foam::fvPatchField, Foam::volMesh>&) const [with Type = double]’ without object interfaceProperties.C:152: warning: unused variable ‘alphaC’ make: *** [Make/linux64GccDPOpt/interfaceProperties.o] Error 1 Any idea of why?? Regards andrea |
Hi,
first you shoud define your "Vol to Point interpolator" in the following manner: for example: interpolate a volScalarField s from cell to points volPointInterpolation interpolateVolPoint (mesh); pointScalarField sP = interpolateVolPoint.interpolate(s); and don't forget to add #include "volPointInterpolation.H" Cheers, Sandro |
Any luck Andrea????
Also, has anybody utilized/ported this code for new versions of OF? Im using OF230. James |
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Hello Sandro, Have you had any experience in edgeCorrectedVolPointInterpolation class? I cannot make any object of this class by : const pointMesh& pMesh = pointMesh::New(mesh); const volPointInterpolation& cpi2=edgeCorrectedVolPointInterpolation::New(mesh, pMesh); |
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