Hello,I have a specific question to the internal emissivity:nIf I define an absorption coefficient for a solid under materials (e.g. 0.05 for aluminum) and define under Boundary Conditions an Internal Emissivity (e.g. 0.5) for an opaque wall made of aluminium, what is my effective emission coefficient for the wall in the simulation? 0.05, 0.025 or 0.5?nI use the DO model (gray model) and the WSGGM for the absorption coefficient of the liquid.nIf I understand correctly the Theory Guide in chapter, the absorption coefficient is the same as the emissivity, but why can I define two different values ​​then?nIs the Internal Emissivity the wall emissivity of formula 5-72?Thank you for your help and timenWith best regardsnArnen