Abstract
Logarithmic wall laws of mean axial velocity and temperature are obtained for the heated inner wall of a vertical concentric annular channel from measurements in turbulent liquid flow. The temperature wall law has limited generality because Prandtl number only in the range 7–8 is considered. When the influence of the buoyancy force as indicated by the parameter Gr q Pr Re 4 becomes large, the velocity and temperature data do not follow the respective wall laws.
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