The local heat transfer coefficient was obtained by using a heat flux meter of the infinitesimal area of heat transfer in mechanically agitated film apparatus with fixed blades.
The local heat transfer coefficient was dependent on the product of the number of blades and rotational speeds by 0.5th power. But the results did not coincide with penetration model due to different degree of turbulence in liquid film, which was affected by axial flow rate, viscosity, clearance and the number of blades.
As a result, the heat transfer in this experiment may be described as the penetration model in combination with empirical correction factor including above effects.
The results can be expressed as
$Nu=0.099(Rer. Pr)^{0.5} Ref^{0.164 }({\frac{δ}{R}})^{-0.124} B^{-0.423}$
with regression coefficient of 0.97.
