[HTML][HTML] A review on turbulent flow over rough surfaces: Fundamentals and theories
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 …
convective flows by inducing perturbations in the velocity profile which affect surface drag …
Predicting the drag of rough surfaces
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 …
a challenge. Currently, the uncertainty is at least 10%, with consequences, for example, on …
Toward a universal roughness correlation
The effects of several surface parameters on equivalent sand roughness (ks) in fully rough
regime are investigated by means of direct numerical simulation (DNS) of flow in channels …
regime are investigated by means of direct numerical simulation (DNS) of flow in channels …
Comparison of turbulent boundary layers over smooth and rough surfaces up to high Reynolds numbers
Comparison of turbulent boundary layers over smooth and rough surfaces up to high
Reynolds numbers Page 1 J. Fluid Mech. (2016), vol. 795, pp. 210–240. c Cambridge …
Reynolds numbers Page 1 J. Fluid Mech. (2016), vol. 795, pp. 210–240. c Cambridge …
Impact of spanwise effective slope upon rough-wall turbulent channel flow
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 …
outer-layer similarity in both mean flow and turbulence statistics, which is attributed to …
High-resolution velocity measurement in the inner part of turbulent boundary layers over super-hydrophobic surfaces
Digital holographic microscopy is used for characterizing the profiles of mean velocity,
viscous and Reynolds shear stresses, as well as turbulence level in the inner part of …
viscous and Reynolds shear stresses, as well as turbulence level in the inner part of …
Data-driven prediction of the equivalent sand-grain height in rough-wall turbulent flows
This paper investigates a long-standing question about the effect of surface roughness on
turbulent flow: What is the equivalent roughness sand-grain height for a given roughness …
turbulent flow: What is the equivalent roughness sand-grain height for a given roughness …
An assessment of the ship drag penalty arising from light calcareous tubeworm fouling
A test coupon coated with light calcareous tubeworm fouling was scanned, scaled and
reproduced for wind-tunnel testing to determine the equivalent sand grain roughness ks. It …
reproduced for wind-tunnel testing to determine the equivalent sand grain roughness ks. It …
Secondary motion in turbulent pipe flow with three-dimensional roughness
The occurrence of secondary flows is investigated for three-dimensional sinusoidal
roughness where the wavelength and height of the roughness elements are systematically …
roughness where the wavelength and height of the roughness elements are systematically …
A fast direct numerical simulation method for characterising hydraulic roughness
We describe a fast direct numerical simulation (DNS) method that promises to directly
characterise the hydraulic roughness of any given rough surface, from the hydraulically …
characterise the hydraulic roughness of any given rough surface, from the hydraulically …