Discussion Forum

I'm trying to model a graphite furnace with a silica rod within it. Using surface to surface radiation feature I can get the furnace to radiate and the silica to receive the incident radiation. When I switch to radiation in participating media, to model the glass rod as semi-transparent using essentially the same boundary conditions, I can no longer get the glass rod to acknowledge that there is radiation impinging on it. Sometimes the simulation will run and I can see the radiation emitted from the graphite but when I look at the incident radiation on the rod it says that G is an undefined variable or that I'm missing something from the stiffness tensor. Am I missing some important boundary or initial condition that only applies to participating media radiation?