Skin-friction and Reynolds number scaling of turbulent channel flow

An experimental study was conducted on smooth-wall, fully-developed, turbulent channel flow. The Reynolds number (\textit{Re}$_{m})$ based on the channel height and the bulk mean velocity ranged from 10,000 -- 300,000. Measurements of the flow rate and the streamwise pressure gradient allowed the skin-friction coefficient ($C_{f})$ to be determined, and its variation with Reynolds number will be discussed and compared with previous investigations. Two-component LDV measurements were also made at friction Reynolds numbers \textit{Re}$_{\tau }$ = 1,000 -- 6,000. The scaling of both the mean flow and the Reynolds stresses will be examined. In particular, the variation in these quantities with Reynolds number will be discussed.