[hvem10]

Dear All,

I have a problem where I have a fluid surrounded by different solids and want to solve the heat transfer in the solids. The solids are surrounded by still air and I need to specify the outer boundary as Convection and give the Heat Transfer Coefficient. I can find different normal values by searching but I can see that I get different results depending on which value I use The higher heat transfer coefficient I use the more heat flux out of the outer boundary. I don't know what the heat flux should be, but want to find out. How do I determine the correct heat transfer coefficient.
Thanks in advance