Spatially-averaged flow statistics within a canopy of large bluff bodies: results from direct numerical simulations


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), 862-875. (doi:10.2478/s11600-008-0025-y).

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Description/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.

Item Type: Article
ISSNs: 1895-6572 (print)
Related URLs:
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
University Structure - Pre August 2011 > School of Engineering Sciences > Aerodynamics & Flight Mechanics
ePrint ID: 64315
Date Deposited: 19 Dec 2008
Last Modified: 27 Mar 2014 18:45
URI: http://eprints.soton.ac.uk/id/eprint/64315

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