[CHUMMAR]

Hello Guys,


I am quite new to openfoam and was trying a turbulent heat transfer case. I edited the blockmesh file for the tutorials>heatTransfer>buoyantPimpleFoam>hotRoomBo ussinesq. Introduced a cubical block with a hot wall (673K) on the left side and a cold wall (193K) on the right side wall. when i ran the case through openFoam for 10000 iterations it is not writing a folder at 100 interval mark which i gace in the controlDict and also no heat transfer is seen between the hot and cold wall.


WHAT AM I DOING WRONG ..... Pls Help

[Yann]

Hi Amal,

Does the solver run properly? Can you post the log files here please?

Thanks,
Yann

[CHUMMAR]

these are the log files...... I blocked the log.setFields file from being written.


the other two log files are here


log.blockMesh
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 7
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
Build : 7-1ff648926f77
Exec : blockMesh
Date : Apr 07 2022
Time : 11:13:08
Host : "chummar-GL553VE"
PID : 4186
I/O : uncollated
Case : /home/chummar/OpenFOAM/chummar-7/run/realone/turbtrial
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10)
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Creating block mesh from
"/home/chummar/OpenFOAM/chummar-7/run/realone/turbtrial/system/blockMeshDict"
Creating block edges
No non-planar block faces defined
Creating topology blocks
Creating topology patches

Creating block mesh topology

Check topology

Basic statistics
Number of internal faces : 0
Number of boundary faces : 6
Number of defined boundary faces : 6
Number of undefined boundary faces : 0
Checking patch -> block consistency

Creating block offsets
Creating merge list .

Creating polyMesh from blockMesh
Creating patches
Creating cells
Creating points with scale 1
Block 0 cell size :
i : 0.5
j : 1
k : 0.5

Writing polyMesh
----------------
Mesh Information
----------------
boundingBox: (0 0 0) (10 10 10)
nPoints: 4851
nCells: 4000
nFaces: 12800
nInternalFaces: 11200
----------------
Patches
----------------
patch 0 (start: 11200 size: 400) name: floor
patch 1 (start: 11600 size: 400) name: ceiling
patch 2 (start: 12000 size: 200) name: hotwall
patch 3 (start: 12200 size: 200) name: coldwall
patch 4 (start: 12400 size: 400) name: fixedWalls

End



log.bouyantPimpleFoam


/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 7
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
Build : 7-1ff648926f77
Exec : buoyantPimpleFoam
Date : Apr 07 2022
Time : 11:13:09
Host : "chummar-GL553VE"
PID : 4187
I/O : uncollated
Case : /home/chummar/OpenFOAM/chummar-7/run/realone/turbtrial
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10)
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0



--> FOAM FATAL IO ERROR:
keyword PIMPLE is undefined in dictionary "/home/chummar/OpenFOAM/chummar-7/run/realone/turbtrial/system/fvSolution"

file: /home/chummar/OpenFOAM/chummar-7/run/realone/turbtrial/system/fvSolution from line 22 to line 65.

From function const Foam::dictionary& Foam::dictionary::subDict(const Foam::word&) const
in file db/dictionary/dictionary.C at line 708.

FOAM exiting





THANKS

[Yann]

Thank you Amal,

Have a look at your buoyantPimpleFoam log file. The solver did not run because it misses the PIMPLE dictionary in the fvSolution file.

You have to fix this error.

Yann

[CHUMMAR]

in the controlDict bouyantPimpleFoam is called but


fvSolution


/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 8
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
location "system";
object fvSolution;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

solvers
{
p_rgh
{
solver PCG;
preconditioner DIC;
tolerance 1e-08;
relTol 0.01;
}

"(U|e|k|epsilon)"
{
solver PBiCGStab;
preconditioner DILU;
tolerance 1e-05;
relTol 0.1;
}
}

SIMPLE
{
nNonOrthogonalCorrectors 0;

pRefCell 0;
pRefValue 0;

residualControl
{
p_rgh 1e-2;
U 1e-4;
e 1e-2;

// possibly check turbulence fields
"(k|epsilon|omega)" 1e-3;
}
}

relaxationFactors
{
fields
{
p_rgh 0.7;
}
equations
{
U 0.3;
e 0.5;
"(k|epsilon|R)" 0.7;
}
}


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






fvSchemes


/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 8
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
location "system";
object fvSchemes;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

ddtSchemes
{
default steadyState;
}

gradSchemes
{
default Gauss linear;
}

divSchemes
{
default none;

div(phi,U) bounded Gauss upwind;
div(phi,e) bounded Gauss upwind;

div(phi,k) bounded Gauss upwind;
div(phi,epsilon) bounded Gauss upwind;

div(phi,Ekp) bounded Gauss linear;

div(((rho*nuEff)*dev2(T(grad(U))))) Gauss linear;
}

laplacianSchemes
{
default Gauss linear corrected;
}

interpolationSchemes
{
default linear;
}

snGradSchemes
{
default corrected;
}


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


Is this cause of mentioning simple in fvSolution instead of pimple

[Yann]

Yes, you are probably using a fvSolution file from a steady case (like buoyantSimpleFoam).
If your case is based on the hotRoomBoussinesq tutorial (tutorials>heatTransfer>buoyantPimpleFoam>hotRoomB oussinesq), try to replace your fvSolution file by the one from the tutorial.

Yann