Accurately predicting turbulent heat transfer over rough walls: a review of measurement equipment and methods

Abstract

Studying turbulent heat transfer over rough surfaces is vital for enhancing heat transfer efficiency in various practical applications. This research presents an in-depth examination of the commissioning of a heated floor boundary layer wind tunnel facility, specifically focussing on addressing the uncertainties in measuring heat transfer over rough walls. Our findings show that minor variations in the slope of the inner-scaled mean temperature profile (κh) on a heated smooth wall have a marginal effect on the estimates of friction temperature and heat transfer coefficients across a range of friction Reynolds numbers (900≲Reτ≲3700) when using the Clauser fit method. Direct heat transfer meas..