Title: Modelling the Effect of Tree Foliage on Sprayer Airflow in Orchards
Authors: Melese Endalew, Ayenew ×
Debaer, Christof
Rutten, Nick
Vercammen, Jef
Delele, Mulugeta Admasu
Ramon, Herman
Nicolai, Bart
Verboven, Pieter #
Issue Date: Jan-2011
Publisher: D. Reidel Pub. Co.
Series Title: Boundary-Layer Meteorology vol:138 issue:1 pages:139-162
Abstract: The effect of tree foliage on sprayer airflow through pear trees in a fruit orchard was studied and modelled in detail. A new three-dimensional (3-D) computational fluid dynamics model that integrates the 3-D canopy architecture with a local closure model to simulate the effect of the stem and branches and leaves of trees separately on airflow was developed. The model was validated with field observations made in an experimental orchard (pcfruit, Sint-Truiden, Belgium) in spring and summer 2008 and was used to investigate the airflow from three air-assisted orchard sprayers (Condor V, Duoprop and AirJet quatt). Velocity magnitudes were measured before and behind leafless and fully-leafed pear canopies across the row while the operating sprayers are passing along the row, and were compared with the simulations. The simulation results predicted the measured values well with all the local relative errors within 20%. The effect of foliar density on airflow from the three air assisted sprayers was manifested by changing the magnitude and direction of the sprayers' air velocity behind the canopy, especially at the denser regions of the canopy and by changing the pattern of velocity decay horizontally along the jet. The developed methodology will also allow a thorough investigation of atmospheric airflow in canopy structures.
ISSN: 0006-8314
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
× corresponding author
# (joint) last author

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