Method for heat transfer calculation on fluid flow in single-phase inside rough pipes

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 x 10(4), Reynolds number for single-phase from 2.4 x 10(3) to 8.2 x 10(6), relative roughness in the interval 0.05 <= e/d <= 0.00005 and correction values of the viscosity factor between 0.006 <= mu(F)/mu(P) <= 177. In 868 data analyzed, for Re < 1 x 10(4), the average error found was 18.51% in the 81.06% of the disposable experimental samples, while for 1 x 10(4) <= Re, the average error found was 19.06% in 80.54% of the disposable samples.