Cavity Radiation in Abaqus 6.11

[NeilC8]

I am trying to analyse 3D heat transfer through a clay brick with three circular holes in the centre. There is a boundary condition of 303K set on one side of the brick and then 278K on the other. the analysis worked when I did not set any surface interactions so the holes in the centre were acting as being fully insulated but in real life the holes will act like a cavity. I've set the interactions all up properly (I think!) but the job will not solve and gives me this error:

The model attributes absolute zero temp must be set. It is required for the following interactions:
CantralCavityInteractions
The model attributes Stefan-Boltzmann constant must be set. It is required for the following interactions:
CantralCavityInteractions

I have these two values but just cant find where to put them in! Is there a icon in the model tree called 'Model Attributes'???

 

[csbarone]

You need to right click on the model name in the model tree and go to edit attributes. From there add absolute zero and Stefan–Boltzmann constant.

 

[loki3000]

lookup 5.1.5 Conductive, convective, and radiative heat transfer in an exhaust manifold
in the example problems manual