| Kobi_Faust |
March 22, 2019 10:52 |
non consistent wallHeatFlux from solid to liquid
Hi all,
I'm having a problem with the coupling of different materials via mappedWall in between a solid and a liquid region.
If I look (in the postProcessing) at the heatfluxes of the coupled patches all the solid-to-solid transitions perfectly fit (power outflow of the one patch equals inflow of the other patch).
But ALL solid-to-water transitions don't. Thereby the heat-flux of the solid (to water) meets the estimated outflow, but the heat flux of the adjoining water area is around 40 % smaller.
Any ideas on this?
The model runs without any warnings and also all other results (pressure, velocity, etc.) are looking reasonable.
Details:
Solver: chtMultiRegionFoam
My model has several solid regions and a water region. Each region is meshed seperatly with an unstructured mesh. The connecting patches are coupled via the mappedWall boundary option:
The following code sections are not complete, but I think all necessery parts should be given. (Otherwise it would be too extensive).
Solid Region 1: constant/Meat_15/polyMesh/boundary
Code:
/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 6
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class polyBoundaryMesh;
location "constant/polyMesh";
object boundary;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
6
(
Meat_15_phi_innen
{
type mappedWall;
sampleMode nearestPatchFaceAMI;
sampleRegion Cladding_innen;
samplePatch Cladding_innen_phi_aussen_to_Meat_15;
offsetMode uniform;
offset ( 0 0 0 );
nFaces 17268;
startFace 87464;
}
...
)
Solid Region 2: constant/Cladding_innen/polyMesh/boundary
Code:
/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 6
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class polyBoundaryMesh;
location "constant/polyMesh";
object boundary;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
12
(
Cladding_innen_phi_innen_to_Wasser
{
type mappedWall;
sampleMode nearestPatchFaceAMI;
sampleRegion Wasser;
samplePatch Wasser_innen_phi_innen;
offsetMode uniform;
offset ( 0 0 0 );
nFaces 336126;
startFace 1679966;
}
Cladding_innen_phi_aussen_to_Meat_15
{
type mappedWall;
sampleMode nearestPatchFaceAMI;
sampleRegion Meat_15;
samplePatch Meat_15_phi_innen;
offsetMode uniform;
offset ( 0 0 0 );
nFaces 50154;
startFace 2302500;
}
...
)
Water Region: constant/Wasser/polyMesh/boundary
Code:
/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 6
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class polyBoundaryMesh;
location "constant/polyMesh";
object boundary;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
24
(
Wasser_innen_phi_innen
{
type mappedWall;
sampleMode nearestPatchFaceAMI;
sampleRegion Cladding_innen;
samplePatch Cladding_innen_phi_innen_to_Wasser;
offsetMode uniform;
offset ( 0 0 0 );
nFaces 575864;
startFace 16477096;
}
...
)
The termperature coupling is done with "compressible::turbulentTemperatureCoupledBaffleMi xed"
Solid Region 1: 0/Meat_15/T
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 4.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
location "0/fuel1";
object T;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [ 0 0 0 1 0 0 0 ];
internalField uniform 310;
boundaryField
{
Meat_15_phi_innen
{
type compressible::turbulentTemperatureCoupledBaffleMixed;
value uniform 310;
Tnbr T;
kappaMethod solidThermo;
}
...
}
Solid Region 2: 0/Cladding_innen/T
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 4.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
location "0/fuel1";
object T;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [ 0 0 0 1 0 0 0 ];
internalField uniform 310;
boundaryField
{
Cladding_innen_phi_innen_to_Wasser
{
type compressible::turbulentTemperatureCoupledBaffleMixed;
value uniform 310;
Tnbr T;
kappaMethod solidThermo;
}
Cladding_innen_phi_aussen_to_Meat_15
{
type compressible::turbulentTemperatureCoupledBaffleMixed;
value uniform 310;
Tnbr T;
kappaMethod solidThermo;
}
...
}
Water Region: 0/Wasser/T
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 4.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
location "0/coolant";
object T;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [ 0 0 0 1 0 0 0 ];
internalField uniform 310.14;
boundaryField
{
Wasser_innen_phi_aussen
{
type compressible::turbulentTemperatureCoupledBaffleMixed;
value uniform 310;
Tnbr T;
kappaMethod fluidThermo;
}
...
}
Thanks for any idea and solution!! |
