Hi,
I am building a 3D model and plan to have a Heat-Transfer BC that will go on the surface layer and simulate monthly average temperature of the ground and I'm having some trouble. The documentation says in addition to a reference temperature (which I have) and an in/out transfer rate, however I'm not sure how to set this up the transfer rate parameter.
The documentation states that the transfer rate is thermal conductivity divided by the thickness (? = ?/d), but the “thickness” parameter is not defined. My model has four different layers, each with different thermal conductivities and thickness's, so I'm not sure what value to use.
When determining the transfer rate, would I use the thickness of each layer as my thickness value? Or should I use the overall thickness of the model for each layer (i.e. if 1st layer is 10m thick, use 10m. If the 2nd layer is 5m thick, use 15m, etc.)?
Thanks in advance