Variation of the Sectional Drag Coefficient of a Group of Buildings with Packing Density |
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Authors: | J L Santiago O Coceal A Martilli S E Belcher |
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Institution: | (1) Environment Department, Research Center for Energy, Environment and Technology (CIEMAT), Av. Complutense 22, 28040 Madrid, Spain;(2) Department of Meteorology, University of Reading, PO Box 243, Reading, RG6 6BB, UK |
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Abstract: | Reynolds-averaged Navier–Stokes (RANS) simulations of turbulent flow over groups of buildings with different packing densities
are reported. The results for a selected packing density are compared with direct numerical simulations (DNS) previously validated
against wind-tunnel data. The present study is focused on average properties of the flow, especially on the drag coefficients,
and is a first attempt to provide information on these parameters (their values are not generally known) for a range of packing
densities, for a given staggered arrangement of cubes using RANS methods. However, some of the limitations of RANS have come
to light. Hence, it is recommended that such simulations are ‘calibrated’ against experimental or DNS data, as is done here. |
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Keywords: | Drag coefficient Packing densities Reynolds-averaged Navier– Stokes (RANS) simulations Staggered arrangement Urban canopy |
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