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fixedGradient boundary condition

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Old   November 17, 2009, 21:44
Default fixedGradient boundary condition
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Senthil Kabilan
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Hi All,

I am working with scalarTransportFoam. I have specified a fixedGradient boundary condition at one of the boundary patches.

inlet
{
type fixedGradient;
gradient uniform 1.5;
}

I need to change the gradient value (i.e, 1.5) between iterations.

Any suggestions?

Thanks in advance!
Senthil
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Old   November 18, 2009, 15:43
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Senthil Kabilan
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Finally, I figured out how to do it...

if(mesh.boundaryField()[patchIMesh1].type() == "fixedGradient")
{
fixedGradientFvPatchScalarField& bufferMesh1= refCast<fixedgradientfvpatchscalarfield>(T.boundar yField()[patchIMesh1]);
scalarField& gradMesh1 = bufferMesh1.gradient();
forAll (bufferMesh1, faceI)
{
gradMesh1[faceI] = ...
}
}

Dont forget to include fixedGradientFvPatchScalarFields.H file before main()

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Old   December 3, 2009, 14:55
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Senthil Kabilan
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There is an error in the aforementioned code...it should be

if(T.boundaryField()[patchIMesh1].type() == "fixedGradient")

not

if(mesh.boundaryField()[patchIMesh1].type() == "fixedGradient")

Where T is the field that needs to be altered.
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