Multiphase porous media model for heat and mass transfer during drying of agricultural products
Kumar, Chandan, Joardder, Mohammad Uzzal Hossain, Farrell, Troy W., Millar, Graeme J., & Karim, Azharul (2014) Multiphase porous media model for heat and mass transfer during drying of agricultural products. In 19th Australasian Fluid Mechanics Conference, 8-11 December 2014, RMIT University, Melbourne, VIC.
Modelling of food processing is complex because it involves sophisticated material and transport phenomena. Most of the agricultural products such fruits and vegetables are hygroscopic porous media containing free water, bound water, gas and solid matrix. Considering all phase in modelling is still not developed. In this article, a comprehensive porous media model for drying has been developed considering bound water, free water separately, as well as water vapour and air. Free water transport was considered as diffusion, pressure driven and evaporation. Bound water assumed to be converted to free water due to concentration difference and also can diffuse. Binary diffusion between water vapour and air was considered. Since, the model is fundamental physics based it can be applied to any drying applications and other food processing where heat and mass transfer takes place in porous media with significant evaporation and other phase change.
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