[kuczmas]

Dear forumers,

is it possible to specify fixed total radiation wall heat flux using viewfactors radiation model in OpenFOAM?

I've looked into the boundary conditions for radiation in the path:

  /opt/openfoam211/src/thermophysicalModels/radiationModels/derivedFvPatchFields/

and the only available BC is greyDiffusiveRadiationViewFactor. And if we search for the implementation of this BC (ex. .../tutorials/heatTransfer/chtMultiRegionSimpleFoam/multiReagionHeaterRadioation/0/bottomAir/ ), for Qr we have:

boundaryField
{
  minX
  {
     type                   greyDiffusiveRadiationViewFactor;
     value                  uniform 0;
     emissivityMode    lookup;
     emissivity           uniform 1;
     Qro                    uniform 0;
  }
}

Does it mean that Qro is the specified total (net) radiative heat flux leaving the surface? Has anybody tried to use such a BC?

Any help is appreciated.

[kuczmas]

Ok, I did my homework and cheked the meaning of Qro inside the class of greyDiffusiveViewFactorFixedValueFvPatchScalarFiel d.H.

So Qro is "external radiative heat flux". Therefore, I think it is not possible to specify total (net) radiative heat flux at wall. Correct me if I'm wrong...