Drying of rough rice as a homogeneous matter was investigated. Rice grain was considered as a finite cylinder. An analytical solution of the unsteady diffusion equation based on Ficks law was obtained. Values of the effective diffusion coefficient were determined by minimizing the sum of the squared differences between the analytical solution and the experimental data, and a correlation in terms of the temperature and air velocity was developed. Agreement between the theoretical and experimental results are very good.
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Ece et al. (1993) studied this question.