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problem in label patchID = mesh.boundaryMesh()[patchi]; |
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September 7, 2019, 10:49
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problem in label patchID = mesh.boundaryMesh()[patchi];
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#1 | ||
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Senior Member
Hojatollah Gholami
Join Date: Jan 2019
Posts: 171
Rep Power: 7  |
Dear All
I want to assign Ta value to boundaryField via internalField. I defined a Ta in only internalField. Then need to assign the center or surface value of near cells of boundary to its boundaryField, I used code Quote:
Quote:
regards, Hojatollah Last edited by Hgholami; September 7, 2019 at 13:07. |
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September 7, 2019, 15:52
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#2 |
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Senior Member
Daniel
Join Date: Mar 2013
Location: Noshahr, Iran
Posts: 348
Rep Power: 21 |
Dear Hgholami,
I think you need to see a few examples of how to use loops in OpenFOAM as the code you have posted doesn't make any sense apart from that error! I will describe a few basic information so you can try and make use of them in your code (I wrote these codes for the explanation purpose and you may find a few typos  ):1- Loop over the cell centers of a volScalarField variable, e.g. Ta Code:
scalarField& TaInternal = Ta.internalField();
// loops over cell centers of Ta
forAll (TaInternal, cellI)
{
TaInternal[cellI] = ...; // make your changes here
}
Code:
vectorField& TaInternal = Ta.internalField();
// loops over cell centers of Ta
forAll (TaInternal, cellI)
{
TaInternal[cellI].x() = ...; // make your changes here
TaInternal[cellI].y() = ...; // make your changes here
TaInternal[cellI].z() = ...; // make your changes here
// or directly with a vector
TaInternal[cellI] = vector::zero;
}
Code:
// loops over boundary patches which depend on your case
forAll (Ta.boundaryField(), patchI)
{
fvPatchScalarField& pTa = Ta.boundaryField()[patchI];
// This now loops over the faces of the corresponding boundary
forAll (pTa, faceI)
{
pTa[faceI] = ...; // make your changes here
}
}
Code:
// loops over boundary patches which depend on your case
forAll (Ta.boundaryField(), patchI)
{
fvPatchVectorField& pTa = Ta.boundaryField()[patchI];
// This now loops over the faces of the corresponding boundary
forAll (pTa, faceI)
{
pTa[faceI].x() = ...; // make your changes here
pTa[faceI].y() = ...; // make your changes here
pTa[faceI].z() = ...; // make your changes here
}
}
 olyPatch variable to a Foam::label which is not possible. If you need the patch ID, you can find it for example by its name:Code:
label patchID = mesh.boundaryMesh().findPatchID("name_of_your_desired_patch");
Regards, D. Khazaei |
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September 9, 2019, 13:01
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#3 | ||
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Senior Member
Hojatollah Gholami
Join Date: Jan 2019
Posts: 171
Rep Power: 7 |
Dear Khazaei
Yes. I think the above code had different types and it make the error. As my variable is scalar, so I use your third code and it compiled successfully. For check the solution, I use "Info" for print position of face center for a case. Quote:
Quote:
Last edited by Hgholami; September 9, 2019 at 15:33. |
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October 3, 2019, 12:36
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#4 |
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Member
Fabien Robaux
Join Date: Oct 2016
Posts: 51
Rep Power: 10 |
If you iterate over a patch, faceI will cover the indices of the PATCH faces. (from 0 to nFaces)
You either need to print the pTb_ faces or convert the local indice into global indice! What you do is you print mesh.Cf() , which returns the center of the MESH faces. (So the 117 first faces of the mesh) Code:
forAll(pTb_, faceI)
{
Info << pTb_[faceI]
<<" face indice: "<< faceI
<<" patch indice:"<<patchI<< endl;
}
(Look at the first output of each new patch : Code:
(0.01 0.00076882 0.0075)positionx0:4 (0.01 0.00076882 0.0075)positionx0:5 |
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