[lumpor]

My case uses a viewFactor radiation model combined with the solarLoad library (OFv2012) to calculate qr at the boundaries. I'm trying to get the right boundary conditions for 0/T to translate this into temperatures in the internal mesh.


The tutorials use compressible::turbulentTemperatureRadMixed as their BCs, but it seems to only be for multi-region cases. Mine is not.



Then I looked at externalWallHeatFluxTemperature, and greyDiffusiveRadiationViewFactor. The latter one seemed to fit my case the most. I'm unsure about what the parameters mean exactly though.


This is my current setup:

type                   greyDiffusiveRadiationViewFactor;
emissivityMode   lookup;
qro                    uniform 0.5;
value                 0.5;

Emissivity is already specified in randiationProperties.foam, so I'm guessing I should use emissivityMode lookup; to get their values.


But then what does qro stand for? And what does value stand for? I'm guessing value stands for the starting value for qr, but then what is qro?


I've tried different values, but either I get division by zero or FOAM FATAL ERROR: Negative initial temperature after a few iterations. How should I configure my BCs?



Thanks.