Heat and mass transfer modeling of the osmo-convective drying of聽yacon roots (Smallanthus sonchifolius)

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• 作者：Camila Augusto Perussello ; Ch ; an Kumar ; Fern ; a de Castilhos ; M.A. Karim
• 关键词：Multiphysics modeling ; Yacon ; Osmotic dehydration ; Convective drying ; Heat and mass transfer
• 刊名：Applied Thermal Engineering
• 出版年：5 February, 2014
• 年：2014
• 卷：63
• 期：1
• 页码：23-32
• 全文大小：1589 K

文摘

Osmotic treatments are often applied prior to convective drying of foods to impart sensory appeal aspects. During this process a multicomponent mass flow, composed mainly of water and osmotic agent, takes place. In this work, a heat and mass transfer model for the osmo-convective drying of yacon was developed and solved by the Finite Element Method using COMSOL Multiphysics^庐, considering a 2-D axisymmetric geometry and moisture dependent thermophysical properties. Yacon slices were osmotically dehydrated for 2聽h in a solution of sucralose and then dried in a tray dryer for 3聽h. The model was validated by experimental data of temperature, moisture content and sucralose uptake (R²聽>聽0.90).