Measurements in an urban-type boundary layer.
Measurements in an urban-type boundary layer.
Wind tunnel measurements of the boundary layer flow over a very rough surface comprising a staggered array of cubes are presented and discussed. Attention is concentrated on the near-wall region, including the canopy region below the tops of the roughness elements. Particle image velocimetry (PIV) and laser Doppler anemometry were used to identify the dominant features of the mean and turbulent flow and these are compared with the better-known features of the flow above the roughness. Spatial correlation data, extracted from the PIV images, are used to provide information about eddy structures and it is shown that these differ in some crucial respects from those typical of more classical boundary layers. The implications of the results are discussed in terms of their relevance to flows within the urban environment.
141-156
Reynolds, Ryan T.
16c859fe-e628-4ac5-a415-9cce14846791
Castro, Ian P.
66e6330d-d93a-439a-a69b-e061e660de61
July 2008
Reynolds, Ryan T.
16c859fe-e628-4ac5-a415-9cce14846791
Castro, Ian P.
66e6330d-d93a-439a-a69b-e061e660de61
Reynolds, Ryan T. and Castro, Ian P.
(2008)
Measurements in an urban-type boundary layer.
Experiments in Fluids, 45 (1), .
(doi:10.1007/s00348-008-0470-z).
Abstract
Wind tunnel measurements of the boundary layer flow over a very rough surface comprising a staggered array of cubes are presented and discussed. Attention is concentrated on the near-wall region, including the canopy region below the tops of the roughness elements. Particle image velocimetry (PIV) and laser Doppler anemometry were used to identify the dominant features of the mean and turbulent flow and these are compared with the better-known features of the flow above the roughness. Spatial correlation data, extracted from the PIV images, are used to provide information about eddy structures and it is shown that these differ in some crucial respects from those typical of more classical boundary layers. The implications of the results are discussed in terms of their relevance to flows within the urban environment.
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measurements_in_an_urban-type_boundary_layer.pdf
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Published date: July 2008
Organisations:
Engineering Sciences
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Local EPrints ID: 64353
URI: http://eprints.soton.ac.uk/id/eprint/64353
ISSN: 0723-4864
PURE UUID: fb4503a0-4c82-460f-9247-005fb1b05c7d
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Date deposited: 06 Jan 2009
Last modified: 15 Mar 2024 11:48
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Author:
Ryan T. Reynolds
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