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 …

Ablative thermal protection systems have experienced renewed interest in the past decade
owing to the retirement of NASA's Space Shuttle fleet and the US presidential mandate to …

The interaction of the overlying turbulent flow with riblets, and its impact on their drag
reduction properties are analysed. In the so-called viscous regime of vanishing riblet …

Dense particle suspensions are widely encountered in many applications and in
environmental flows. While many previous studies investigate their rheological properties in …

The interaction of the overlying turbulent flow with a riblet surface and its impact on drag
reduction are analysed. The 'viscous regime'of vanishing riblet spacing, in which the drag …

Computations of channel flow with rough walls comprising staggered arrays of cubes having
various plan area densities are presented and discussed. The cube height h is 12.5% of the …

Results are presented from an experimental study of shallow flow in a channel partially
obstructed by an array of circular cylinders. The cylinder array is a model for emergent …

Natural and engineered surfaces are never smooth, but irregular, rough at different scales,
compliant, possibly porous, liquid impregnated or superhydrophobic. The correct numerical …

The effect of the variations of the permeability tensor on the close-to-the-wall behaviour of a
turbulent channel flow bounded by porous walls is explored using a set of direct numerical …

We present an efficient solver for massively-parallel direct numerical simulations of
incompressible turbulent flows. The method uses a second-order, finite-volume pressure …