Developed Turbulent Fluid Flow in Ducts with a Circular Cross-Section
This chapter presents derivation of the Nusselt number correlations for fluid flows over a flat surface. The formulae are also used to calculate the heat transfer coefficient on the inner surface of tubes. However, the coefficient values obtained in this manner should be treated as an approximation only, due to the fact that the fluid flow velocity distributions in a tube and over a flat surface differ from each other. The fluid mean temperature used to calculate the heat transfer coefficient is also different.