wallHeatFlux function returns zeros
 

Hello OpenFoamers!

I am quite new in Openfoam and trying to setup radiation heat transfer case using viewFactor model.

I was able to run simulation successfully, but wallHeatFlux function specified in controlDict returns zeros for min/max/integral heat fluxes on the hotWall.

Could you please suggest where I am wrong with my case setup?

Case setup is attached.

Thanks in advance for any help!