Turbulent temperature profiles and heat exchange law in single-phase flow in pipes

Some continuous relationships are presented for the description of velocity and temperature laws of the wall in a turbulent fluid flow together with a new formula for the calculation of heat exchange of a single-phase fluid in pipes. From the laws of the wall structural characteristics of turbulent flow can be derived: the profiles of turbulent viscosity and Reynolds shear stress, the turbulent conductivity and turbulent heat flux density, and the turbulent Prandtl number over the whole pipe radius. The universal heat transfer correlations which is deduced from the logarithmic descriptions of the velocity and temperature profiles is valid for Prandtl numbers exceeding 0.7. (orig.)