DO radiation model
 

Hello, I am modelling radiation inside an enclosure using Fluents DO model. Some of the enclosure boundaries are semi-tranparent. Since I have some specular reflecting areas inside the enclosure (diffus fraction < 1), in some solids occur temperatures below any temperatures specified at the boundaries, which makes physically absolutely no sense. Has anyone similar problems or any good advice in order to avoid such problems in radiation calculation?

Thanks in advance. Jan