incompatible dimensions for operation

shakirbsm · November 3, 2014, 05:56

Dear foamers

I have wrote solver for a coupled system which is working fine for the cavity case but when I run this solver for a different 3D domain then i get this error which is quite strange for me.
Can somebody help?

--> FOAM FATAL ERROR:
incompatible dimensions for operation
[Un[0 1 -2 0 0 0 0] ] + [Un[0 2 -3 0 0 0 0] ]

From function checkMethod(const fvMatrix<Type>&, const fvMatrix<Type>&)
in file /home/nshakir/OpenFOAM/OpenFOAM-2.2.2/src/finiteVolume/lnInclude/fvMatrix.C at line 1314.

RodriguezFatz · November 3, 2014, 06:10

For some reason you try to add two values with different units and openFoam complains about that. Units are shown in the way [kg m s K kgmol A d], so you try to add "m/s^2" and "m^2/s^3".

Edit: You say your code worked in a different case. Then, it is most likely that one of your input / boundary condition files (k, nu, ...) has the wrong dimension at the top of the file!

shakirbsm · November 3, 2014, 06:29

Dear Philipp

The solver is running for cavity case and taking the same case but with different 3D domain and only one different condition that is on boundary (rotatingWallVelocity) I get this error. So the only reason for this error can be this condition but I don't know how to sort it out.

Regards
Noman

shakirbsm · November 3, 2014, 06:50

Dear Philipp

Sorry, it was my bad, I found the error in transportProperties, dimensions of a parameter were wrong. Problem solved now.
Thanks for pointing.

Regards
Noman

November 3, 2014, 05:56	incompatible dimensions for operation	#1
shakirbsm New Member Noman Shakir Join Date: Feb 2014 Posts: 5 Rep Power: 12	Dear foamers I have wrote solver for a coupled system which is working fine for the cavity case but when I run this solver for a different 3D domain then i get this error which is quite strange for me. Can somebody help? --> FOAM FATAL ERROR: incompatible dimensions for operation [Un[0 1 -2 0 0 0 0] ] + [Un[0 2 -3 0 0 0 0] ] From function checkMethod(const fvMatrix<Type>&, const fvMatrix<Type>&) in file /home/nshakir/OpenFOAM/OpenFOAM-2.2.2/src/finiteVolume/lnInclude/fvMatrix.C at line 1314.

November 3, 2014, 06:10		#2
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 27	For some reason you try to add two values with different units and openFoam complains about that. Units are shown in the way [kg m s K kgmol A d], so you try to add "m/s^2" and "m^2/s^3". Edit: You say your code worked in a different case. Then, it is most likely that one of your input / boundary condition files (k, nu, ...) has the wrong dimension at the top of the file! __________________ The skeleton ran out of shampoo in the shower.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Incompatible dimensions for operation	pramodopen4foam	OpenFOAM	10	January 4, 2024 05:51
modified solver gives this message: "incompatible dimensions for operation"	sajad6	OpenFOAM Programming & Development	3	October 30, 2014 08:02
Incompatible dimensions	sfigato	OpenFOAM Running, Solving & CFD	2	January 22, 2013 18:50
Incompatible dimensions....	Amiga500	OpenFOAM Running, Solving & CFD	13	June 1, 2012 08:20
incompatible dimensions for operation (rhoSimpleFoam)	dongest	OpenFOAM Running, Solving & CFD	3	July 19, 2011 05:51

November 3, 2014, 06:29		#3
shakirbsm New Member Noman Shakir Join Date: Feb 2014 Posts: 5 Rep Power: 12	Dear Philipp The solver is running for cavity case and taking the same case but with different 3D domain and only one different condition that is on boundary (rotatingWallVelocity) I get this error. So the only reason for this error can be this condition but I don't know how to sort it out. Regards Noman

November 3, 2014, 06:50		#4
shakirbsm New Member Noman Shakir Join Date: Feb 2014 Posts: 5 Rep Power: 12	Dear Philipp Sorry, it was my bad, I found the error in transportProperties, dimensions of a parameter were wrong. Problem solved now. Thanks for pointing. Regards Noman