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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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.
|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
|Date Deposited:||19 Dec 2008|
|Last Modified:||01 Jun 2011 12:23|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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