A liquid diffusion model to describe drying of whole bananas using boundary-fitted coordinates

Article

da Silva, Wilton Pereira, Hamawand, Ihsan and e Silva, Cleide M.D.P.S.. 2014. "A liquid diffusion model to describe drying of whole bananas using boundary-fitted coordinates." Journal of Food Engineering. 137, pp. 32-38. https://doi.org/10.1016/j.jfoodeng.2014.03.029
Article Title

A liquid diffusion model to describe drying of whole bananas using boundary-fitted coordinates

ERA Journal ID9657
Article CategoryArticle
Authorsda Silva, Wilton Pereira (Author), Hamawand, Ihsan (Author) and e Silva, Cleide M.D.P.S. (Author)
Journal TitleJournal of Food Engineering
Journal Citation137, pp. 32-38
Number of Pages7
Year2014
PublisherElsevier
ISSN0260-8774
1873-5770
Digital Object Identifier (DOI)https://doi.org/10.1016/j.jfoodeng.2014.03.029
Web Address (URL)http://www.sciencedirect.com/science/article/pii/S0260877414001423
Abstract

This article uses a liquid diffusion model to describe convective drying of whole bananas. The experiments were carried out with drying air temperatures at 40, 50, 60 and 70 degrees C. A two-dimensional numerical solution in generalized coordinates of the diffusion equation with boundary condition of the third kind, obtained through the finite volume method, was used to describe the process. A structured nonorthogonal grid was obtained by digitization of the photography of the fruit. In order to determine the thermo-physical properties, an optimizer was coupled with the numerical solution. The model proposed
in this article, which includes shrinkage and variable effective moisture diffusivity, well describes drying for all the experimental conditions, and makes it possible to predict the moisture distributions at any given time. The determination coefficients were greater than 0.99970 and the chi-squares were less than 8.33*10-4.

Keywordsgeneralized coordinates; irregular geometry; real geometry variable effective mass diffusivity; moisture distribution
ANZSRC Field of Research 2020400403. Chemical engineering design
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Byline AffiliationsFederal University of Campina Grande, Brazil
National Centre for Engineering in Agriculture
Institution of OriginUniversity of Southern Queensland
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