Abstract
In a storage drying just after arrival of new grains of rice, a new type of bins with an auger for grain mixing has been recently developed in order to prevent the cracking of grains due to over-drying at the bottom part of bins. In this paper, a new mathematical model was proposed considering the probability density function of moisture content of grains in order to quantify the scattering of moisture content of grains in bins and effect of controlling its irregularity during the drying processes. This type of drying process proceeds with the repetition of two modes, static and mixing.
The calculated results of time course of the average moisture content of grains by the model agreed well with the experimental results. Furthermore, by comparing the calculated results of the standard deviation of moisture content of grains within a bin with the experimental results, it was shown that this model can predict well both an increase in scattering the moisture content with time in the static mode and a decrease in its scattering with time in the mixing mode.
