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 …

The effect of spanwise wavelength of surface heterogeneity on turbulent secondary flows Page
1 J. Fluid Mech. (2020), vol. 894, A7. c The Author(s), 2020. Published by Cambridge University …

Secondary flows can develop in turbulent boundary layers that grow over surfaces with
spanwise inhomogeneities. In this article, we demonstrate the formation of secondary flows …

An experimental investigation of a turbulent boundary-layer flow over a heterogeneous
surface is carried out to examine the mean flow and turbulence characteristics, and to …

The effect of spanwise heterogeneous surface geometry on turbulent boundary layer
secondary flows and on skin friction is investigated experimentally. The surfaces consist of …

Turbulent flow over a surface with streamwise-elongated rough and smooth stripes is
studied by means of direct numerical simulation (DNS) in a periodic plane open channel …

Direct numerical simulations of turbulent boundary layers over longitudinal surface
roughness are performed to investigate the impact of the surface roughness on the mean …

The role of turbulent large-scale streaks or large-scale motions in forming subaqueous
sediment ridges on an initially flat sediment bed is investigated with the aid of particle …

We investigate the behaviour of large-scale coherent structures in a spanwise-
heterogeneous turbulent boundary layer, using particle image velocimetry on multiple …

Surface structuring in form of streamwise-aligned triangular ridges is investigated in the
framework of a fully developed turbulent channel flow with constant wall temperatures of …