Properties of the inertial sublayer in adverse pressure-gradient turbulent boundary layers

The inertial sublayer of adverse pressure-gradient (APG) turbulent boundary layers is investigated using new experimental measurements ( $7000 \lesssim \delta ^+ 7800$ ), existing lower Reynolds number $\delta \approx 1000$ ) and computational ^+<800$ data sets, where ^+$ the friction number. In present set-up layer under modest APG conditions, Clauser PG parameter $\beta$ ${\leq }1.8$ . Well-resolved hot-wire are obtained at Flow Physics Facility University New Hampshire in region an ramp. Comparisons made with zero (ZPG TBL) similar numerical simulation main aims study centre on TBL degree to which its characteristics those ZPG TBL. This investigation utilizes equation-based analyses empirical approaches. Among other results, suggest that even though streamwise variance does not exhibit a logarithmic profile (unlike both TBLs distance-from-the-wall scaling sublayer. Theoretical arguments wall-distance resulting from self-similar dynamics consistent single velocity scale leading log-law mean as well multiple scales power-law profile.