[Sagun]

Hello,

I am getting this error while trying to run my case files:

--> FOAM FATAL ERROR:
LHS and RHS of + have different dimensions
dimensions : [0 2 -2 0 0 0 0] + [1 -1 -2 0 0 0 0]


From function operator+(const dimensionSet&, const dimensionSet&)
in file dimensionSet/dimensionSet.C at line 514.

FOAM aborting

#0 Foam::error:rintStack(Foam::Ostream&) in "/opt/openfoam211/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
#1 Foam::error::abort() in "/opt/openfoam211/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
#2 Foam:perator+(Foam::dimensionSet const&, Foam::dimensionSet const&) in "/opt/openfoam211/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
#3
at interFoam.C:0
#4
in "/opt/openfoam211/platforms/linuxGccDPOpt/bin/interFoam"
#5 __libc_start_main in "/lib/i386-linux-gnu/libc.so.6"
#6
in "/opt/openfoam211/platforms/linuxGccDPOpt/bin/interFoam"


I think this has something to do with the dimensions of pressure (the ones which I have used are [0 2 -2 0 0 0 0]).

Any help will be much appreciated.

[Bernhard]

Dimension of pressure in interFoam should be [1 -1 -2 0 0 0 0];

In incompressible and single phase solver, usually, p/rho is used instead of just p. You're trying to use the former one for interFoam, which is not correct.

[Sagun]

Thank you so much. It worked!

But now I am getting time step continuity errors in my simulations. I just went through some of the old forums on the same and found out that they are related to the pressure solver tolerance. Typical values that I'm getting:

time step continuity errors : sum local = 6.68285e-06, global = -5.08031e-07, cumulative = -0.000199826


Is the cumulative value too big and a cause for concern? If yes, how can I fix it?

[akidess]

Originally Posted by Sagun

I just went through some of the old forums on the same and found out that they are related to the pressure solver tolerance.

Originally Posted by Sagun

If yes, how can I fix it?

Did you try your own suggestion?

[Sagun]

Hello!

No I haven't tried that yet since my simulations are still running. I figured that I should let it run atleast once and see what the results looks like.

But is the cumulative value too large and something to be worried about?