[jcastello]

Hello!

I'm new on OpenFoam and I've been practicing and reading a lot about it, but now I've had a problem that I couldn't solve, and I've been looking a lot about it.

I followed a tutorial from The Foam House, the chapter 2, Plane parallel plates case.
(http://the-foam-house5.webnode.es/pr...l-plates-case/)

I've followed everything they said, and when I run icoFoam, appears this.

FOAM FATAL IO ERROR:
keyword pFinal is undefined in dictionary "/home/joan/FoamCases/ppWall/system/fvSolution.solvers"

This is the fvSolution:

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1606+ |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii ;
class dictionary ;
location "system" ;
object fvSchemes ;
}
// ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ //
solvers
{
p
{
solver PCG;
preconditioner DIC;
toleance 1e-06;
relTol 0;
}
U
{
solver PBiCG;
preconditioner DILU;
tolerance 1e-05;
relTol 0;
}
}

PISO
{
nCorrectors 2;
nNonOrthogonalCorrectors 0;
pRefCell 0;
pRefValue 0;
}
// ************************************************** ******************************* //

Also before this problem I had another one similar that I think I solved, console showed me this:

FOAM FATAL IO ERROR:
keyword laplacian(nu[0,U) is undefined in dictionary "/home/joan/FoamCases/ppWall/system/fvSchemes.laplacianSchemes"

fvSchemes:

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1606+ |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii ;
class dictionary ;
location "system" ;
object fvSchemes ;
}
// ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ //

ddtSchemes
{
default Euler ;
}
gradSchemes
{
default Gauss linear ;

grad ( p ) Gauss linear ;
}
divSchemes
{
default none ;
div(phi,U) Gauss linear ;
}

laplacianSchemes
{
default Gauss linear orthogonal ;
laplacian (nu,U) Gauss linear orthogonal ;
laplacian ((1|A(U)),p) Gauss linear orthogonal ;
}
interpolationSchemes
{
default linear ;
interpolate (HbyA) linear ;
}
snGradSchemes
{
default orthogonal ;
}
fluxRequired
{
default no;
p ;
}

// ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ //

For solving it I replaced on laplacianSchemes the line of default none; for default Gauss linear orthogonal ;

I showed the last problem thinking that can be useful to solve the problem of pFinal.

Hope you can help me with this!

Thank you for your time!

[Tobi]

Hello Jcastello,

• There are code-Tags for representing code (or file content); this is a better formating than using italic fonts.

• The following problem:

FOAM FATAL IO ERROR: 
keyword laplacian(nu[0,U) is undefined in dictionary "/home/joan/FoamCases/ppWall/system/fvSchemes.laplacianSchemes"

is related to the fact that you did something interesting. I don't know what you changed (and I will not check your link) but it seems that you implemented a new equation or changed the laplacian guy from

fvm::laplacian(nu, U)

to something like that:

fvm::laplacian(nu, U, "laplacian(nu[0,U)")

The third argument is the name of the discretization scheme that you need to define in fvSchemes. If we do not write the third argument, FOAM will build the default one which whould be laplacian(nu,U). But sometimes it is better to define an own one like (just an example):

fvm::laplacian(nu, U, "laplacian(foobar-I-Am-A-Rabbit,PleaseSolveMe)")

Doing so, you will overwrite the default name with the new one. Hence, you need to define the discretization scheme for that term based on the new name.

• The problem with pFinal is also wired because pFinal is normally used if you use the PIMPLE algorithm. However, to get rid of that problem you have to add the following line to your fvSolution:

pFinal
{
   $p;
   relTol 0;
}

Note
The things that I mentioned above may solve your problem but I highly recommend to check the stuff you did again because it seems really strange and that you did something wrong. To know if you are running in PISO or PIMPLE mode, you can check the output of the solver.

[jcastello]

Ok! I will try to change all this that you are saying.

Also thank you for the tips!

[mbfranklin@gmail.com]

Thank you for the pFinal tip, saved my icoFoam/a$$

[HappyS5]

Hello,

I thought this information might help another newbie.

As a simple reminder, when using icoFoam, a transient solver, make sure you change the ddtScheme in fvSchemes to something other than steadystate. Euler is often used.