DIFFUSION COEFFICIENTS FOR PREDICTING ROUGH RICE RE-WETTING BEHAVIOR |
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Authors: | M. A. Basunia T. Abe |
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Affiliation: | Department of Biomechanical Systems , Ehime University , Tarumi 3-5-7, Matsuyama, 790-8566, Japan |
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Abstract: | ABSTRACT Thin-layer re-wetting experiments were conducted with medium grain rough rice in the temperature range of 17.8 to 45°C and for relative humidities between 56 and 89.3%, with initial moisture contents in the range of 10.26 to 12.71% dry-basis to determine the diffusion coefficient of rough rice. Recent efforts to characterize the re-wetting characteristics of rough rice are summarized. New equation for temperature dependent liquid diffusion coefficients for medium grain rough rice are presented. The diffusion coefficient in re-wetting was lower than the drying. The results presented here, over typically five day re-wetting, will be useful in studying the longer term moisture transfer process occurring during ventilated storage. |
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Keywords: | Thin-layer moisture transfer oven temperature relative humidity |
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