Authors: Feizollah Shahbazi, Ali Dowlatshah, Saman Valizadeh
Aerodynamic properties of solid materials have long been used to convey and separate seeds and grains during post harvest operations. The objective of this study was evaluation of the aerodynamic properties of mung bean seeds as a function of moisture content from 7.8 to 25% (w.b) and two grades of A and B referred to above and below a cut point of 4.8 mm in length. The results showed that as the moisture content increased from 7.8 to 25%, the terminal velocity of mung beans seeds increased following a polynomial relationship from 7.28 to 8.79 and 6.02 to 7.12 m/s, for grades A and B, respectively. Mung bean seeds at grade A had terminal velocities with a mean value of 8.05 m/s, while the seeds at grade B had a mean value of 6.46 m/s. The Reynold?s number of both grades A and B increased linearly with the increase of seeds moisture content. While, drag coefficient decreased with the increase of moisture content. Mathematical relationships were developed to relate the change in seeds moisture content with the obtained values of aerodynamics properties. The analysis of variance showed that moisture content was significant at the 1% probability level on the all aerodynamics properties of mung bean seeds.