Abstract
An analytical and experimental study is performed in this study to evaluate the discharge rate of grain flow from different discharge gates of a grain seeder. Three different apertures (circular, rectangular, and square with approximately the same area) are considered in the experiments. Based on the results obtained in this study, discharge rate of the circular aperture is the maximum. In contrast, the square aperture has a minimum discharge rate. It is also found that, with increasing the grain height in the tank, the discharge rate does not change significantly. Regarding the non-uniform and oscillating discharge from a square aperture, it is not recommended to be used for discharging grain materials from a reservoir, grain drills, storage tanks, or silos.
