On the calculation of heat transfer rates in fully turbulent wall flows

A wall function for heat transfer is derived from the heat and mass transfer laws developed by Kader and Yaglom for turbulent wall flows. The wall function is used as a component of a prediction procedure to compute heat transfer rates in boundary layers, pipes, and wall jets. The results are generally in good agreement with the experimental data, but under most conditions the new function gives only a relatively minor improvement over existing functions. However, significant improvement is obtained for very large molecular Prandtl numbers.