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 …

Whereas streamwise effective slope (surfaces in this study can lead to diminished levels of
outer-layer similarity in both mean flow and turbulence statistics, which is attributed to …

The skewness of the roughness height distribution is one of the key topographical
parameters that govern roughness effects on wall-bounded turbulence. In this paper …

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

Barnacle-type roughness can be considered as a hybrid form of roughness that combines
some of the topographical features of traditional regular rough surfaces composed of …

While blade surface roughness arising from in-service wear and/or the manufacturing
process greatly affects aero-thermal performance, the detailed underlying physical …

Surface roughness influences the release of avalanches and the dynamics of rockfall,
avalanches and debris flow, but is often not objectively implemented in natural hazard …

Direct numerical simulations (DNSs) are performed to investigate the roughness effects on
the statistical properties and the large-scale coherent structures in the turbulent channel flow …

In the last decade, with the growing demand for efficient and more sustainable products that
reduce our CO2 footprint, progresses in Additive Manufacturing (AM) have paved the way for …