Surface roughness can significantly influence the fluid dynamics and heat transfer in
convective flows by inducing perturbations in the velocity profile which affect surface drag …

Reliable full-scale prediction of drag due to rough wall-bounded turbulent fluid flow remains
a challenge. Currently, the uncertainty is at least 10%, with consequences, for example, on …

In the fully rough regime, proposed models predict a scaling for a roughness heat-transfer
coefficient, eg the roughness Stanton number can remain an apt description of the flow …

A new approach based on the power mean is suggested for defining an equivalent
homogeneous roughness length kehr which takes into account patchiness or …

This study presents an experimental dataset documenting the evolution of a turbulent
boundary layer downstream of a rough-to-smooth surface transition. To investigate the effect …

Several high-resolution scale-resolving simulations are carried out to examine the effect of
riblets on the mean and turbulent statistics of a zero-pressure-gradient boundary layer. The …

In this study, we develop an analytical model to predict the turbulent boundary layer
downstream of a step-change in the surface roughness where upstream flow conditions are …

This study investigates the impact of complex heterogeneous terrain on mean wind speed
and turbulence intensity, highlighting the significance of terrain configuration in the wind …

A flat-plate turbulent boundary layer (TBL) is experimentally subjected to a family of 22
favourable–adverse pressure gradients (FAPGs) using a ceiling panel of variable convex …

Based on experimental data acquired with particle image velocimetry, we examine turbulent
boundary layers that are subjected to an abrupt change in wall roughness in the streamwise …