Local heat transfer on the entrance segment of a tube with a sharp inlet edge. 2. Correction for the entrance segment under turbulent boundary layer conditions

Abstract

A correction relation eX=f(Red;X/d) is proposed for the entrance segment, where turbulent flow occurs in a surface boundary layer developing upon completing the transient process. An elevated local heat transfer intensity in a separated flow region beyond a sharp inlet edge is considered to be a consequence of the M-shaped velocity field profile that exists over a substantial length of the entrance segment.