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 …

Quadrant analysis is a simple, but quite useful, turbulence data-processing technique that
has been widely used, principally in the investigation of turbulent shear flows. This article …

Studying the microclimate of plant canopies has long motivated scientists in various
research fields such as agronomy, ecology or silviculture, and almost a century has passed …

We compare the turbulence statistics of the canopy/roughness sublayer (RSL) and the
inertial sublayer (ISL) above. In the RSL the turbulence is more coherent and more efficient …

A new turbulent inflow generator technique that can be used as inflow boundary condition
for LES of lower atmospheric boundary flow (ABL) is proposed based on synthesizing …

In the last two decades substantial advances have been made in the understanding of the
scientific basis of urban climates. These are reviewed here with attention to sustainability of …

We study the dynamics of turbulent boundary layer flow over a heterogeneous topography
composed of roughness patches exhibiting relatively high and low correlation in the …

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 …

The city of London, UK, has seen in recent years an increase in the number of high-rise/multi-
storey buildings (“skyscrapers”) with roof heights reaching 150 m and more, with the Shard …

Further to our previous large-eddy simulation (LES) of flow over a staggered array of uniform
cubes, a simulation of flow over random urban-like obstacles is presented. To gain a deeper …