Locating near wall cells for evaporation model
 

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;

}
}
}

That should work :)

Cheers,

Lieven

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?