Effects of a forest clearing

An experimental and numerical assessment

Tetsuya Nakamura, Koji Fukagata, Antonio Segalini, P. Henrik Alfredsson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
PublisherTSFP-8
Volume1
ISBN (Electronic)9780000000002
Publication statusPublished - 2013 Jan 1
Event8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 - Poitiers, France
Duration: 2013 Aug 282013 Aug 30

Other

Other8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
CountryFrance
CityPoitiers
Period13/8/2813/8/30

Fingerprint

Turbulence
Large eddy simulation
Velocity measurement
Wind tunnels
Momentum
Statistics
Fluxes
Defects
Geometry

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Nakamura, T., Fukagata, K., Segalini, A., & Alfredsson, P. H. (2013). Effects of a forest clearing: An experimental and numerical assessment. In International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 (Vol. 1). TSFP-8.

Effects of a forest clearing : An experimental and numerical assessment. / Nakamura, Tetsuya; Fukagata, Koji; Segalini, Antonio; Alfredsson, P. Henrik.

International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013. Vol. 1 TSFP-8, 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nakamura, T, Fukagata, K, Segalini, A & Alfredsson, PH 2013, Effects of a forest clearing: An experimental and numerical assessment. in International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013. vol. 1, TSFP-8, 8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013, Poitiers, France, 13/8/28.
Nakamura T, Fukagata K, Segalini A, Alfredsson PH. Effects of a forest clearing: An experimental and numerical assessment. In International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013. Vol. 1. TSFP-8. 2013
Nakamura, Tetsuya ; Fukagata, Koji ; Segalini, Antonio ; Alfredsson, P. Henrik. / Effects of a forest clearing : An experimental and numerical assessment. International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013. Vol. 1 TSFP-8, 2013.
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