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Locating near wall cells for evaporation model

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Old   January 30, 2014, 14:34
Default Locating near wall cells for evaporation model
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Hi everyone,

I am trying to simulate evaporation due to high heat flux on a specific wall. I have written following lines to locate the near wall cells where the evaporation occurs.
At this moment I am only considering a constant value for evaporation (GammaGL[iCell] = 20).
I was wondering if these lines locate the near wall cells and employ the evaporation rate on the near wall cells?

Thanks for your help.


const fvPatchList& patches = mesh.boundary();

forAll(patches, patchi)
{

const fvPatch& thePatchItselfWall = patches[patchi];

if (isA<wallFvPatch>(thePatchItselfWall))
{
forAll(thePatchItselfWall, iFace)
{
label iCell = thePatchItselfWall.faceCells()[iFace];
vector iCellCentre = mesh.cellCentres()[iCell];

GammaGL[iCell] = 20;

}
}
}
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Old   January 30, 2014, 18:09
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Lieven
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That should work

Cheers,

Lieven
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Old   February 4, 2014, 03:56
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I am also going to implement a similar behaviour in the future. I was planning to add a source term for rho in the first cell layer, based on the heat flux going into the wall. The wall would have a fixedValue boundary condition matching the evaporation temperature of the material. Do you think this is a possible approach or are there better methods?
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