Investigating turbulence in wind flow over complex terrain

Show simple item record O'Sullivan, John en Pecnik, R en Iaccarino, G en
dc.coverage.spatial Stanford University en 2012-06-27T22:12:23Z en 2010 en
dc.identifier.citation Stanford CTR Summer Program, Stanford University, 24 Jun 2010 - 20 Jul 2010. 129-139. 2010 en
dc.identifier.uri en
dc.description.abstract Increasing worldwide wind energy production means wind farms are being constructed in areas where the terrain is more complex. Two important features of wind flow over complex terrain are flow separation and anisotropic turbulence. The most commonly used simulation approaches for wind flow use the Reynolds-averaged Navier-Stokes (RANS) equations with a k − ε turbulence closure. A model using this closure has difficulty in estimating separation accurately and cannot represent turbulent anisotropy. In other applications the v^{2}f turbulence closure has shown good ability to predict flow separation. Similarly, the algebraic structure-based turbulence model (ASBM) has shown promise in capturing turbulent anisotropy. In the present study the flow over a representative hill that includes these features is calculated using the RANS equations with both the v2f and ASBM closures. A novel implementation of the ASBM closure is developed allowing a stable, smooth solution to be obtained. The results are compared with experimental data for the same flow, and a good agreement is obtained for the separated region and the Reynolds stress components. Wall functions are developed for the v2f closure to enable the simulation of higher Reynolds number flows both with and without surface roughness. The results are compared with experimental data and are shown to accurately capture the separated region. en
dc.description.uri en
dc.relation.ispartof Stanford CTR Summer Program 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. en
dc.rights.uri en
dc.title Investigating turbulence in wind flow over complex terrain en
dc.type Conference Item en
pubs.begin-page 129 en
pubs.end-page 139 en
pubs.finish-date 2010-07-20 en
pubs.start-date 2010-06-24 en
dc.rights.accessrights en
pubs.subtype Conference Paper en
pubs.elements-id 345439 en Engineering en Engineering Science en
pubs.record-created-at-source-date 2012-05-03 en

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