HORTON, PIPE HYDRAULICS, AND THE ATMOSPHERIC BOUNDARY-LAYER

Around the turn of the century, when Horton was conducting his famous weir experiments, in the same laboratory Saph and Schoder recorded some pipe flow data that were to have a profound impact on the evolution of turbulent boundary layer theory. These, by way of Blasius's dimensional analysis, ultimately led Prandtl to derive the 1/7 power equation for the velocity profile; this in turn was the precursor of the logarithmic equation. the cornerstone of all present-day similarity formulations for the atmospheric boundary layer.