Numerical Calculation of the 3-Dimensional Motion of Wind-borne Debris

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dc.contributor.author Richards, Peter en
dc.contributor.author Williams, N en
dc.contributor.author Laing, B en
dc.contributor.author McCarty, M en
dc.contributor.author Pond, M en
dc.date.accessioned 2012-03-14T00:30:51Z en
dc.date.issued 2008 en
dc.identifier.citation Journal of Wind Engineering and Industrial Aerodynamics 96(10-11):2188-2202 01 Oct 2008 en
dc.identifier.issn 0167-6105 en
dc.identifier.uri http://hdl.handle.net/2292/14289 en
dc.description.abstract Most previous studies of wind-borne debris have only considered two-dimensional (2D) motion. While this can demonstrate many basic principles, it is a special case that is unlikely to occur in a real storm situation. In these 2D cases, the normal force coefficient and the position of the centre of pressure are only functions of the angle of attack. In addition, the centre of pressure is always located on the plane of symmetry. In the present study, rectangular plates with side length ratios of 1, 2 and 4 and long rods with sectional side length ratios of 1, 2 and 3 were wind tunnel tested at a range of angles of attack and tilt angles. The results clearly show that the force coefficients depend on both of these angles. Further it is shown that the centre of pressure moves both towards and across the wind. A model for this movement is presented. A 6-degree-of-freedom (6-DoF) trajectory model is presented, which makes use of the measured forces and the model for the centre of pressure position. This programme also incorporates damping terms and hysteresis effects due to dynamic stall and apparent camber. It is shown that the computed trajectories reasonably match those observed with model plates and rods in free flight. The trajectory model is used to predict the three-dimensional motion of full-scale plates. It is shown that this motion includes significant lateral movement and that horizontal speeds very close to, or even exceeding, the wind speed are predicted. en
dc.publisher Elsevier en
dc.relation.ispartofseries Journal of Wind Engineering and Industrial Aerodynamics en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0167-6105/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Numerical Calculation of the 3-Dimensional Motion of Wind-borne Debris en
dc.type Journal Article en
dc.identifier.doi 10.1016/j.jweia.2008.02.060 en
pubs.begin-page 2188 en
pubs.volume 96 en
dc.rights.holder Copyright: Elsevier en
pubs.end-page 2202 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 81363 en
pubs.record-created-at-source-date 2010-09-01 en


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