Turbulent film flow heat transfer at high film Reynolds number

This investigation presents experimental measurements for the local heat transfer of turbulent film flow inside vertical tubes at high film Reynolds numbers with varying interfacial shear stress. Most experimental data available now for water vapor condensation in vertical tubes have been limited to film Reynolds number values under 2500 (Ref = Γ/μ1) and low shear stress ranges. Here a novel experimental system was constructed for measuring local heat fluxes in downward turbulent flow with a pregenerated liquid film. This work both extended the experimental database to film Reynolds numbers of 10,000 and fills out the database to high shear values