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Title: Dehydration of apple tissue: Intercomparison of neutron tomography with numerical modelling
Authors: Aregawi, Wondwosen Abebe
Defraeye, Thijs
Saneinejad, Saba
Vontobel, Peter
Lehmann, Eberhard
Carmeliet, Jan
Derome, Dominique
Verboven, Pieter
Nicolai, Bart # ×
Issue Date: Dec-2013
Publisher: Pergamon Press
Series Title: International Journal of Heat and Mass Transfer vol:67 pages:173-182
Abstract: A multiphysics model was applied to study the moisture loss accompanied by large mechanical deformation of apple tissue samples (Malus × domestica Borkh. cv. ‘Braeburn’) during dehydration. The model incorporated a water transport model and a nonlinear viscoelastic deformation model and was solved using the finite element method. Satisfactory model performance was indicated, based on a comparison of the total water loss, the transient water distribution profiles and the mechanical deformation profiles, measured using quantitative neutron tomography. This indicated that the numerical model is a viable alternative to (neutron) experiments. A particular advantage of the model, compared to the experiments, is that it allows to quantify the hygro-stresses during drying, which showed that during dehydration, the surface of the sample attempts to shrink but is restrained by the inner wet tissue. Although access to facilities which produce neutrons is limited, neutron imaging also showed large potential for studies on fruit dehydration, as accurate quantification of the water content was possible.
URI: 
ISSN: 0017-9310
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
Department of Civil Engineering - miscellaneous
× corresponding author
# (joint) last author

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