[bobo5195]

I think that you might be wrong there. A thermal boundary layer (thin layer of liquid above the surface) , is where conduction is the dominant transfer medium in the fluid. Conduction does occur in fluids but it only dominates over small distances such as the exit of the jets on the storm seris of blocks. What your effectively saying is that the prandtl number is infinite, whihc is not the case.

My estimation is that the exit to the storm is all thermal boundary layer. If it is not boundary layer then it should be by design as by definition the boundary layer is where most of the special luvly heat transfer takes place, or at least the major part of the thermal gradient.

Conduction is heat transfer in a stationary medium; not nescessarly a solid.