Mean flow and turbulence in unsteady canopy layers

W Li, MG Giometto - Journal of Fluid Mechanics, 2023 - cambridge.org
Non-stationarity is the rule in the atmospheric boundary layer (ABL). Under such conditions,
the flow may experience departures from equilibrium with the underlying surface stress …

Turbulence measurements: An assessment of Acoustic Doppler Current Profiler accuracy in rough environment

P Mercier, M Thiébaut, S Guillou, C Maisondieu… - Ocean …, 2021 - Elsevier
The deployment of tidal turbines requires a precise hydrodynamic characterisation of the
production site. Acoustic Doppler Current Profilers (ADCP), usually employed for measuring …

Asymmetric secondary flows above geometrically symmetric surface roughness

W Zhang, XIA Yang, X Zhu, M Wan… - Journal of Fluid …, 2023 - cambridge.org
The mean flow behaviour of a turbulent boundary layer over rough walls is expected to
exhibit symmetries that govern the flow dynamics. In particular, when roughness elements …

Large-eddy simulation of the urban boundary layer using drag-porosity modeling

Q Bucquet, I Calmet, L Perret, M Maché - Journal of Wind Engineering and …, 2023 - Elsevier
This work details the assessment of the performance of the drag-porosity model
implemented in ARPS (Advanced Regional Prediction System) atmospheric Large-Eddy …

Study of interscale interactions for turbulence over the obstacle arrays from a machine learning perspective

W Liu, Y Zou, X Li - Physics of Fluids, 2023 - pubs.aip.org
Investigating interactions between large-and small-scale motions is essential for
understanding turbulence over rough boundaries. The present work applies XGBoost …

Effects of the roughness height in turbulent boundary layers over rod-and cuboid-roughened walls

YK Choi, HG Hwang, YM Lee, JH Lee - … Journal of Heat and Fluid Flow, 2020 - Elsevier
Direct numerical simulations (DNSs) of spatially developing turbulent boundary layers
(TBLs) over two-dimensional (2D) rod-roughened walls and three-dimensional (3D) cuboid …

Assessment of inner–outer interactions in the urban boundary layer using a predictive model

K Blackman, L Perret, R Mathis - Journal of Fluid Mechanics, 2019 - cambridge.org
Urban-type rough-wall boundary layers developing over staggered cube arrays with plan
area packing density, is the height of the roughness elements. The synchronized two-point …

The structure of turbulence in unsteady flow over urban canopies

W Li, MG Giometto - Journal of Fluid Mechanics, 2024 - cambridge.org
The topology of turbulent coherent structures is known to regulate the transport of energy,
mass and momentum in the atmospheric boundary layer (ABL). While previous research has …

The influence of roughness-element-spacing on turbulent entrainment over spanwise heterogeneous roughness

Y Long, J Wang, C Pan - Physics of Fluids, 2023 - pubs.aip.org
Spanwise heterogeneous surfaces have been found to modulate local turbulent entrainment
by inducing large-scale secondary flows (SFs). This work aims to clarify the variations of the …

Direct Numerical Simulation of Turbulent Boundary Layer over Cubical Roughness Elements

M Yoon - Applied Sciences, 2024 - mdpi.com
The present study explores turbulence statistics in turbulent flow over urban-like terrain
using direct numerical simulation (DNS). DNS is performed in a turbulent boundary layer …