Accessibility navigation

How to parametrize urban-canopy drag to reproduce wind-direction effects within the canopy

Santiago, J. L., Coceal, O. and Martilli, A. (2013) How to parametrize urban-canopy drag to reproduce wind-direction effects within the canopy. Boundary-Layer Meteorology, 149 (1). pp. 43-63. ISSN 0006-8314

Full text not archived in this repository.

It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1007/s10546-013-9833-y


The mean wind direction within an urban canopy changes with height when the incoming flow is not orthogonal to obstacle faces. This wind-turning effect is induced by complex processes and its modelling in urban-canopy (UC) parametrizations is difficult. Here we focus on the analysis of the spatially-averaged flow properties over an aligned array of cubes and their variation with incoming wind direction. For this purpose, Reynolds-averaged Navier–Stokes simulations previously compared, for a reduced number of incident wind directions, against direct numerical simulation results are used. The drag formulation of a UCparametrization ismodified and different drag coefficients are tested in order to reproduce the wind-turning effect within the canopy for oblique wind directions. The simulations carried out for a UC parametrization in one-dimensional mode indicate that a height-dependent drag coefficient is needed to capture this effect.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:34596

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation