A turbulence kinetic energy budget analysis in a windtunnel model canopy

W. Yue, W. Zhu, C. Meneveau, M. B. Parlange, H. S. Kang, Michael J Katz

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

Turbulent flow over a windtunnel model canopy composed of stalks is investigated by large eddy simulation (LES), and the computational results are compared with experimental data from Particle Image Velocimetry and Hotwire Anemometer measurements. There is very good agreement between the LES predictions and the experimental data. Inactive 'sloshing' motions are observed at the low levels of the model canopy. A detailed analysis of turbulent kinetic energy (TKE) budget indicates that the 'sloshing' motions are mainly driven by the pressure perturbations. Turbulence shear production is strong at the top of the stalks. The dissipation rate accounts for the largest TKE loss above the model canopy. Inside the model canopy, the work against the stalk drag is the major TKE loss. Deep inside the stalks, all the budget terms are relatively small in magnitude and the shear production nearly ceases, suggesting that the large-scale turbulent eddies are inhibited by the stalks.

Original languageEnglish
Title of host publication17th Symposium on Boundary Layers and Turbulence, 27th Conference on Agricultural and Forest Meteorology, 17th Conference on Biometeorology and Aerobiology
Number of pages4
Publication statusPublished - 2006
Externally publishedYes
Event17th Symposium on Boundary Layers and Turbulence, 27th Conference on Agricultural and Forest Meteorology, 17th Conference on Biometeorology and Aerobiology - San Diego, United States of America
Duration: 22 May 200625 May 2006

Conference

Conference17th Symposium on Boundary Layers and Turbulence, 27th Conference on Agricultural and Forest Meteorology, 17th Conference on Biometeorology and Aerobiology
CountryUnited States of America
CitySan Diego
Period22/05/0625/05/06

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