Radiation modelling

Deeps

Hi all,

Is there any way I can define a wall which can absorb the incoming radiation but no emission or reflection takes place? I want to model a radiation problem to calculate radiation energy transfer between hot and cold plates and also between hot plate and the outside environment. Right now I have two solid bodies immersed in a fluid domain and a part of radiation emitted by these bodies is reflected back by the fluid domain walls. I want to assign properties to fluid domain walls in a way they will not emit or reflect any radiation.

I have tried emissivity as '0' but in that case there was no emission but all the incident radiation reflected back. I also tried emissivity '1' and room temperature boundary on fluid domain wall but still my results are not looking good.

I appreciate your help.

Deeps