Spatially-averaged flow statistics within a canopy of large bluff bodies: results from direct numerical simulations
Spatially-averaged flow statistics within a canopy of large bluff bodies: results from direct numerical simulations
The flow within a canopy of large bluff bodies is highly turbulent and spatially heterogeneous. Results from direct numerical simulations over groups of cubical obstacles are analysed using the double-averaging methodology. The obstacles occupy a significant fraction of the canopy space; this gives rise to substantial dispersive stresses within the canopy. The underlying bluff-body turbulent dynamics is different from typical canopy turbulence, and this is reflected in the double-averaged statistics. The spatially-averaged velocities, stresses and drag force depend significantly upon the layout of the obstacles. An ongoing challenge is to parameterise these spatially-averaged quantities in terms of the obstacle geometry and layout.
862-875
Coceal, Omduth
c89d9de1-c311-4203-b6ea-b72eb48fa4f9
Thomas, T. Glyn
bccfa8da-6c8b-4eec-b593-00587d3ce3cc
Belcher, Stephen E.
2418e58c-7f4f-4890-ad8d-a89531f7f4d3
September 2008
Coceal, Omduth
c89d9de1-c311-4203-b6ea-b72eb48fa4f9
Thomas, T. Glyn
bccfa8da-6c8b-4eec-b593-00587d3ce3cc
Belcher, Stephen E.
2418e58c-7f4f-4890-ad8d-a89531f7f4d3
Coceal, Omduth, Thomas, T. Glyn and Belcher, Stephen E.
(2008)
Spatially-averaged flow statistics within a canopy of large bluff bodies: results from direct numerical simulations.
Acta Geophysica, 56 (3), .
(doi:10.2478/s11600-008-0025-y).
Abstract
The flow within a canopy of large bluff bodies is highly turbulent and spatially heterogeneous. Results from direct numerical simulations over groups of cubical obstacles are analysed using the double-averaging methodology. The obstacles occupy a significant fraction of the canopy space; this gives rise to substantial dispersive stresses within the canopy. The underlying bluff-body turbulent dynamics is different from typical canopy turbulence, and this is reflected in the double-averaged statistics. The spatially-averaged velocities, stresses and drag force depend significantly upon the layout of the obstacles. An ongoing challenge is to parameterise these spatially-averaged quantities in terms of the obstacle geometry and layout.
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Published date: September 2008
Organisations:
Aerodynamics & Flight Mechanics
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Local EPrints ID: 64315
URI: http://eprints.soton.ac.uk/id/eprint/64315
ISSN: 1895-6572
PURE UUID: ec7698b8-410b-49d7-8c53-d4d515c3568e
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Date deposited: 19 Dec 2008
Last modified: 15 Mar 2024 11:47
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Author:
Omduth Coceal
Author:
T. Glyn Thomas
Author:
Stephen E. Belcher
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