[dongest]

good Morning Foamer,
can somebody help me about this error happen by running rhoSimpleFoam,

thank you for your help

--> FOAM FATAL ERROR:
incompatible dimensions for operation
[U[0 1 -2 0 0 0 0] ] + [U[1 -2 -2 0 0 0 0] ]

From function checkMethod(const fvMatrix<Type>&, const fvMatrix<Type>&)
in file /opt/CFD/OpenFOAM/OpenFOAM-1.7.1/src/finiteVolume/lnInclude/fvMatrix.C at line 1191.

FOAM aborting

#0 Foam::error:rintStack(Foam::Ostream&) in "/opt/CFD/OpenFOAM/OpenFOAM-1.7.1/lib/linux64IccDPOpt/libOpenFOAM.so"
#1 Foam::error::abort() in "/opt/CFD/OpenFOAM/OpenFOAM-1.7.1/lib/linux64IccDPOpt/libOpenFOAM.so"
#2 Foam::tmp<Foam::fvMatrix<Foam::Vector<double> > > Foam:perator+<Foam::Vector<double> >(Foam::tmp<Foam::fvMatrix<Foam::Vector<double> > > const&, Foam::tmp<Foam::fvMatrix<Foam::Vector<double> > > const&) in "/opt/CFD/OpenFOAM/OpenFOAM-1.7.1/applications/bin/linux64IccDPOpt/rhoSimpleFoam"
#3 main in "/opt/CFD/OpenFOAM/OpenFOAM-1.7.1/applications/bin/linux64IccDPOpt/rhoSimpleFoam"
#4 __libc_start_main in "/lib64/libc.so.6"
#5 Foam::regIOobject::writeObject(Foam::IOstream::str eamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/CFD/OpenFOAM/OpenFOAM-1.7.1/applications/bin/linux64IccDPOpt/rhoSimpleFoam"
Aborted

[Bernhard]

How did you define the dimensions of U en p in the 0/ directory?

[dima]

Hi,
i got this kind of error a few times
and one reason was the dimension of pressure

in incompressible cases its
dimensions [0 2 -2 0 0 0 0];

and in compressible its
dimensions [1 -1 -2 0 0 0 0];

hope this helps you

regards, Dima

[dongest]

thank you!
the dimension fo U are [0 1 -1 0 0 0 0]
and for p I tried with [1 -1 -2 0 0 0 0] for compressible flow
and [0 2 -2 0 0 0 0] for imcompressible flow