Hi,
The "Surface Heat Transfer Coefficient" is calculated with "wall temperature", "total surface heat flux" and a "reference temperature". This reference temperature is a global value used on all faces. The accuracy of the surface htc (heat transfer coefficient) depends on the accuracy of the simulation and this reference or bulk temperature.
The "Wall Func. Heat Tran. Coef." depends on the local solution of the flow field in a cell next to a wall. It is completely independent of the surface heat flux. Therefore it exists also for adiabatic walls.
The "Net" is calculated based on area weighted average.
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