[barracuda]

Hi, I am following video tutorial https://www.youtube.com/watch?v=BG-dkp7z1fI

pitzdaily case.

See 6:24

Error:
Unable to set reference cell for field p
Please supply either pRefCell or pRefPoint

Why is this needed? It is not in the tutorial.

I have noticed there exists a topic about similar problem, but not with pitzdaily and they did not mention what exactly they changed in the fvSolution.

Just a moment, I will send the code.

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 5 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
location "system";
object fvSolution;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

solvers
{
p
{
solver GAMG;
tolerance 1e-08;
relTol 0.1;
smoother GaussSeidel;
}

"(U|k|epsilon|omega|f|v2)"
{
solver smoothSolver;
smoother symGaussSeidel;
tolerance 1e-08;
relTol 0.1;
}
}

SIMPLE
{
nNonOrthogonalCorrectors 0;
consistent yes;

residualControl
{
p 1e-6;
U 1e-6;
"(k|epsilon|omega|f|v2)" 1e-3;
}
}

relaxationFactors
{
equations
{
U 0.7; // 0.9 is more stable but 0.95 more convergent
".*" 0.3; // 0.9 is more stable but 0.95 more convergent
}
}


// ************************************************** *********************** //

[einstein_zee]

Originally Posted by barracuda

Hi, I am following video tutorial https://www.youtube.com/watch?v=BG-dkp7z1fI

pitzdaily case.

See 6:24

Error:
Unable to set reference cell for field p
Please supply either pRefCell or pRefPoint

Why is this needed? It is not in the tutorial.

I have noticed there exists a topic about similar problem, but not with pitzdaily and they did not mention what exactly they changed in the fvSolution.

Just a moment, I will send the code.

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 5 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
location "system";
object fvSolution;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

solvers
{
p
{
solver GAMG;
tolerance 1e-08;
relTol 0.1;
smoother GaussSeidel;
}

"(U|k|epsilon|omega|f|v2)"
{
solver smoothSolver;
smoother symGaussSeidel;
tolerance 1e-08;
relTol 0.1;
}
}

SIMPLE
{
nNonOrthogonalCorrectors 0;
consistent yes;

residualControl
{
p 1e-6;
U 1e-6;
"(k|epsilon|omega|f|v2)" 1e-3;
}
}

relaxationFactors
{
equations
{
U 0.7; // 0.9 is more stable but 0.95 more convergent
".*" 0.3; // 0.9 is more stable but 0.95 more convergent
}
}


// ************************************************** *********************** //

this is already addressed in here "https://www.cfd-online.com/Forums/openfoam-pre-processing/62259-fvsolution-prefcell-prefvalue.html".

[barracuda]

Thank you so much.
https://cfd.direct/openfoam/user-guide/fvsolution/

However I got an error.

wait a moment to paste it:

Reading field U

Reading/calculating face flux field phi



--> FOAM FATAL IO ERROR:
Illegal master cellID 0. Should be 0..0

file: /home/fsx/OpenFOAM/fsx-5.0/run/LaminarPipe3d/system/fvSolution.SIMPLE from line 39 to line 47.

From function bool Foam::setRefCell(const volScalarField&, const volScalarField&, const Foam::dictionary&, Foam::label&, Foam::scalar&, bool)
in file cfdTools/general/findRefCell/findRefCell.C at line 58.


My code here:


SIMPLE
{
nNonOrthogonalCorrectors 0;
consistent yes;
pRefCell 0;
pRefValue 0;
residualControl
{
p 1e-6;
U 1e-6;
"(k|epsilon|omega|f|v2)" 1e-3;
}
}

relaxationFactors
{
equations
{
U 0.7; // 0.9 is more stable but 0.95 more convergent
".*" 0.3; // 0.9 is more stable but 0.95 more convergent
}
}

I tested 0 , 0.0 and 0. values, all results error.

Refence to cfdTools/general/findRefCell/findRefCell.C
in unknown location (I cannot find cfdTools directory)

[barracuda]

p:

boundaryField
{
inlet
{
type zeroGradient;
}

outlet
{
type fixedValue;
value uniform 0;
}

wall
{
type zeroGradient;
}
}

U:


boundaryField
{
inlet
{
type fixedValue;
value uniform (0502464 0 0);
}

outlet
{
type zeroGradient;
}

wall
{
type noSlip;
}

}

Please see the error in the post above

Edit:
checkMesh outputs mesh is OK

[barracuda]

Finally I have solved that:

SIMPLE
{
nNonOrthogonalCorrectors 0;
consistent yes;
residualControl
pRefCell 0;
pRefValue 0.0;
{
pRefCell 0;
pRefValue 0.0;
p 1e-6;
U 1e-6;
"(k|epsilon|omega|f|v2)" 1e-3;
}
}