radiation on interfaces

Alex

Hello!!

I have to put a thermal radiation boundary condition (emissivity)on an interface between a solid domain and a fluid domain (air: non partecipating media). Have I to put same value of emissivity for both sides of the interface? Can I set an emiss=0 for the air side and an emiss=0.98 for the solid side of the interface? Am I rigth or this setting will give some problems?

Last question : when should I use "conservative interface flux" for a fluid-solid interface?

I use the monte carlo model

Thank you all for the help