Opaque - Thermal Radiation

Subha

Hai all,

I am doing a Fluid Solid CHT simulation. I have divided my fluid domain into different domains (one that is in contact with farfield boundaries and one that is in contact with solid regions) for simplicity. There are Fluid Fluid interfaces between these domains. I have set a Thermal Radiation Model to those Fluid domains which have the farfield boundary and I have set a Thermal Radiation BC to the farfield boundaries.

In this case, the Fluid Fluid interfaces become compulsarily opaque for Thermal Radiation. Is this right?

Or should I set the Fluid domain which have contact with the solid regions also to Thermal Radiation model and the Fluid Fluid interfaces to conservative interface flux?

Thank you.

Regards,

Subha.