[vahid.najafi]

Hi dear Foamers.
I have a probleb in fvSolution?
in my solver's fvSolution ,i have :

PIMPLE
{
momentumPredictor no;
nOuterCorrectors 1;
nCorrectors 2;
nNonOrthogonalCorrectors 1;
cAlpha 0;
nAlphaCorr 1;
nAlphaSubCycles 1;
}

and i have to change momentumPredictor no ---> to momentumPredictor yes ,i do this but i seen :


--> FOAM FATAL IO ERROR:
keyword snGrad(p_rgh) is undefined in dictionary "/home/vahid/OpenFOAM/vahid-2.0.1/run/ventmesh/exam/system/fvSchemes::snGradSchemes"
file: /home/vahid/OpenFOAM/vahid-2.0.1/run/ventmesh/exam/system/fvSchemes::snGradSchemes from line 54 to line 57.
From function dictionary::lookupEntry(const word&, bool, bool) const
in file db/dictionary/dictionary.C at line 400.
FOAM exiting


when i see above error i changed solve's fvSchemes :

snGradSchemes
{
default none;
snGrad(pd) limited 0.5;
snGrad(rho) limited 0.5;
snGrad(alpha1) limited 0.5;
}

change to :

snGradSchemes
{
default corrected;
}


but my problem is not solved and seen another error:

--> FOAM FATAL IO ERROR:
keyword UFinal is undefined in dictionary "/home/vahid/OpenFOAM/vahid-2.0.1/run/ventmesh/exam/system/fvSolution::solvers"
file: /home/vahid/OpenFOAM/vahid-2.0.1/run/ventmesh/exam/system/fvSolution::solvers from line 21 to line 121.
From function dictionary::subDict(const word& keyword) const
in file db/dictionary/dictionary.C at line 461.
FOAM exiting




please help me to change momentumPredictor no ---> to momentumPredictor yes Without any error!!!!??????

Thanaks for your attention.

[michielm]

The error message indicates that you have to specify settings for Ufinal. If you're unsure what to pick, I suggest just adding the following piece to your fvSolution:

UFinal
{
$U;
}

This will make sure that you use the same settings for UFinal as for U.

[saeid.oqaz]

hi. vahid jan.
you should add snGrad(p_rgh) in to fvSchemes dict in subDict snGradSchemes

[vahid.najafi]

dear michielm and saeid jan Thanks for your answers.

but i must say that, saeid's answer is perfect.

I Could solve my problem with your Guidelines.

[amin_jalalian]

Originally Posted by michielm

The error message indicates that you have to specify settings for Ufinal. If you're unsure what to pick, I suggest just adding the following piece to your fvSolution:

UFinal
{
$U;
}

This will make sure that you use the same settings for UFinal as for U.

Hi,

Do you know what is difference between U and UFinal ?