Abstract
In the present technical note a new method is provided for determining the heat transfer in the fluid flow in single-phase inside rough pipes. The model was tested by adjusting it with existing experimental quantities of a total of 33 different fluids, including gases, organic substances, water and air. The method presented is valid for a range of Prandtl number for single-phase from 0.65 to 4.5×104, Reynolds number for single-phase from 2.4×103 to 8.2×106, relative roughness in the interval 0.05≤e/d≤0.00005 and correction values of the viscosity factor between 0.006≤μF/μP≤177. In 868 data analyzed, for Re<1×104, the average error found was 18.51% in the 81.06% of the disposable experimental samples, while for 1×104≤Re, the average error found was 19.06% in 80.54% of the disposable samples.
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