[engeagle]

Hello,

I will use radiation model (DO) in my simulation. But I didn't use it before, so I have some problems. In my simulation, one wall temperature is 1273 K. Temperature is 293 K for other walls. This is a furnace. Air flows inside the furnace. But I don't know absorption coefficient, scattering coefficient, refractive index, emissivity values. How can I decide these values? Are these values important for only air? Also, can these values important for wall material? I couldn't be sure of it, because there is no wall thickness in the model. In addition, How can I obtain better convergence?

Thank you.