Articles
CFD optimization algorithm for a moving boundary problem of isothermal drying and shrinkage
Article number
1382_6
Pages
41 – 50
Language
English
Abstract
A moving-boundary FEM model describing isothermal drying of fruit was employed as an inverse problem to estimate water diffusivity and peel resistance, including shrinkage.
Water diffusivity and peel resistance were estimated using the Levenberg-Marquardt (L-M) optimisation algorithm based on drying data.
The surface resistance is the sum of the peel and boundary layer resistances, the latter being negligible compared to the former.
The estimated peel resistance is found to decrease by 62% as the drying temperature increases from 45 to 65°C and by 55% as the drying temperature increases from 55 to 65°C. The proposed model efficiently predicts water content, shrinkage and water diffusivity.
Water diffusivity and peel resistance were estimated using the Levenberg-Marquardt (L-M) optimisation algorithm based on drying data.
The surface resistance is the sum of the peel and boundary layer resistances, the latter being negligible compared to the former.
The estimated peel resistance is found to decrease by 62% as the drying temperature increases from 45 to 65°C and by 55% as the drying temperature increases from 55 to 65°C. The proposed model efficiently predicts water content, shrinkage and water diffusivity.
Authors
D. Lentzou, A.G. Boudouvis, V. Karathanos, G. Xanthopoulos
Keywords
figs, water diffusivity, surface resistance, COMSOL, inverse method
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