Title: CFD model development and validation of a thermonebulisation fungicide fogging system for postharvest storage of fruit
Authors: Delele, Mulugeta Admassue ×
Vorstermans, Ben
Creemers, Pieter
Tsige, Alemayehu Ambaw
Tijskens, Engelbert
Schenk, Ann
Opara, Linus U.
Nicolai, Bart
Verboven, Pieter #
Issue Date: 30-Jul-2011
Publisher: Applied Science Publishers
Series Title: Journal of Food Engineering vol:108 issue:1 pages:59-68
Abstract: Postharvest treatments of fruits in storage rooms using a fogging system is a recent development that
offer a promising means to reduce the use of fungicides in the orchards, where ecological and environmental
risks are higher than in the closed environment of the storage room. To investigate the effectiveness
of postharvest storage fungicide fogging systems, a computational fluid dynamics (CFD) model was
developed and validated. A discrete element (DE) method was applied to generate a random stacking of
spherical fruits in a typical bin. The CFD model was then employed to study explicitly the air and fungicide
particle flow through the bin vent holes and through the voids of the stack, and to predict the deposition
behaviour of the fungicide particle on the products. For model validation purposes, a standardized
set-up was used with a single fruit bin positioned in a cold store that was operated at different air flow
rates. Good agreement was found between measured and predicted results of deposition profiles of fungicide
particles. The deposition on the top layer of the fruit stack was higher than the bottom one, and
higher deposition was observed on the top sides than on the bottom sides of the fruit.
The effect of air flow rates and different bin handling parameters on fungicide particles flow and deposition
were investigated. Air circulation rates of 0 m3 h1 (no air circulation), 4080 m3 h1 and
6800 m3 h1 and 9520 m3 h1 were used. The highest fungicide deposition on the fruit was observed during
fogging without air circulation while the lowest deposition corresponded to fogging with the highest
air circulation rate. Covering the top of the bin with foil and removing the bottom plastic foam that is
usually placed on the bottom floor of the bin improves the uniformity of fungicide deposition throughout
the bin. Removing the bottom plastic liner increased the average deposition of the fungicide particles,
while covering the top of the bin decreased the average deposition.
ISSN: 0260-8774
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science