Mathematical investigation of the effects of slicing on the osmotic dehydration of sphere and cylinder shaped fruits

Mohammad Sirousazar, Akbar Mohammadi-Doust and Bahram Fathi Achachlouei
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Mohammad Sirousazar: Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran
Akbar Mohammadi-Doust: Chemical Engineering Group, Faculty of Engineering and
Bahram Fathi Achachlouei: Food Science and Technology Group, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran

Czech Journal of Food Sciences, 2009, vol. 27, issue 2, 95-101

Abstract: The dehydration kinetics of the fruits with special geometries, i.e. spherical and cylindrical (e.g. apple, peach, banana, pineapple, etc.), were studied based on mathematical methods. The influence of the size reduction (slicing) of these fruits into smaller rings was also investigated. The mathematical modelling was performed based on the Fick's second law. The results showed that increasing the value of the water diffusion coefficient in fruit (for instance, via increasing the process temperature) promotes faster water migration from the fruit. Mathematical modelling also showed that the characteristic length of fruits (radius) is in an inverse relation to the dehydration kinetics. Comparing the results obtained with both the sphere- and cylinder-shaped fruits revealed that slicing the fruit into more thin rings makes a better condition for operating the osmotic dehydration process with a higher efficiency and a shorter duration.

Keywords: osmotic dehydration; slicing; mass transfer; mathematical modelling (search for similar items in EconPapers)
Date: 2009
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:27:y:2009:i:2:id:72-2008-cjfs

DOI: 10.17221/72/2008-CJFS

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