Turbulent heat transfer over rough surfaces is crucial in natural and industrial processes, yet
it has received less attention than that of momentum transfer. Recently, research in this field …

Drawing inspiration from the distinctive textures of shark skin and the feathers and tails of
birds in flight, the convergent–divergent surface pattern shows potential in influencing …

Turbulent drag reduction (DR) through streamwise travelling waves of the spanwise wall
oscillation is investigated over a wide range of Reynolds numbers. Here, in Part 1, wall …

The effect of longitudinal riblets on the spatially developing Tollmien–Schlichting (T–S)
waves within the boundary layer is numerically investigated by direct numerical simulation …

In this study, we experimentally investigate the turbulent heat transfer characteristics of
rectangular channels equipped with miniature transverse, inclined, and V-shaped ribs, each …

This study examines the effects of surface topography on the flow and performance of a self-
propelled swimming (SPS) body. We consider a thin flat plate with an egg-carton roughness …

Numerical simulations provide unfettered access to details of the flow where experimental
measurements are difficult to obtain. This paper summarises the progress achieved in the …

We investigate experimentally the effects of micro-grooves on the development of a zero
pressure gradient turbulent boundary layer at two different values of the friction Reynolds …

Owing to the limited supply and pressure margin in the air system, a cooling technique
providing efficient heat transfer with lower flow loss is highly desirable for gas turbine …

Direct numerical simulations (DNSs) of spatially developing thermal turbulent boundary
layers over angle-ribbed walls were performed. Four rib angles (γ= 90°, 60°, 45° and 30°) …