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Effects of a forest clearing: An experimental and numerical assessment
KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0001-8667-0520
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1146-3241
2013 (English)In: International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013, TSFP-8 , 2013, Vol. 1Conference paper, Published paper (Refereed)
Abstract [en]

The flow above a forest model with and without the presence of a clearing is investigated experimentally in a wind tunnel facility by means of Particle Image Velocimetry. The results have been analyzed in terms of basic velocity statistics and vertical integral length scale and a comparison of the two geometries is presented. In order to improve the current flow understanding and to complement the experimental results, Large Eddy Simulations of the same flows under similar operating conditions are planned. The experimental results indicate that the clearing is associated to a velocity defect in the mean velocity profile associated with a significant vertical momentum flux. The turbulence is redistributed amongst the various velocity components so that the streamwise velocity variance is reduced while the vertical velocity variance is enhanced. From the clearing windward edge the turbulence mixing contributes to the decrease of the vertical correlation length that increases again after the clearing trailing edge.

Place, publisher, year, edition, pages
TSFP-8 , 2013. Vol. 1
Keywords [en]
Computational fluid dynamics, Forestry, Large eddy simulation, Turbulence, Velocity, Velocity measurement, Wind tunnels, Mean velocity profiles, Operating condition, Particle image velocimetries, Stream-wise velocities, Velocity components, Velocity statistics, Vertical correlation, Wind-tunnel facilities, Shear flow
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-222985Scopus ID: 2-s2.0-85034064565ISBN: 9780000000002 (print)OAI: oai:DiVA.org:kth-222985DiVA, id: diva2:1193186
Conference
8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013; Poitiers-Futuroscope FrancePoitiers; France; 28 August 2013 through 30 August 2013
Funder
StandUp for Wind
Note

QC 20180326

Available from: 2018-03-26 Created: 2018-03-26 Last updated: 2019-09-04Bibliographically approved

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Segalini, AntonioAlfredsson, P. Henrik

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