Dear Wilg,
About the isolated side, I meant to refer to the height, sorry for not having specified it clearer.
On the other hand, thank´s for your the paper you provided me.
I derived the nusselt number for a square-shaped duct which is isolated on one side. Considerations I´ve taken into account are: Hydrodynamic - thermal fully developed regimen, Hahagen-poiseuille velocity profile, all properties are constants. Unfortunately I haven´t other result which I can...
