Abstract
Spout loading results in the accumulation of broken kernel and fine materials below the auger chute with spatial distribution over the radial direction. This hinders the air distribution affecting the proper execution of stored grain management practices with any stored bulk. For their optimal performance, it is necessary to assess the effect of systems characteristics on the fine material distribution.This study investigated a generalized dimensionless model of broken corn and foreign material (BCFM) distribution using the dimensionless analysis of the Buckingham theorem. The model considered practical loading parameters in the proposed equation to predict BCFM after the filling process. Practical filling parameters that were investigated includes fill pipe diameter, material flow rate and initial BCFM. Statistical parameters such as RMSE (root mean square error), Chi-square (χ2), coefficient of determination (R2), and MRDM (mean relative deviation modulus) were determined to assess the suitability of the developed model.The results showed that the generalized dimensionless model predicted fine material distribution in the experimental silo with reasonable accuracy. It predicted the nonlinear sifting effect across the radial direction and showed a higher concentration of fines near the bulk core section. It was observed that the sifting effect in a center-filled silo was more pronounced with a lower broken kernel.
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