An experimental study on the engineering, frictional, and aerodynamic properties of pearl millet grain was conducted which are essential to design different post-harvest gadgets such as threshers, winnowers, and storage bins. The study was conducted within the moisture content range from 9.2% to 20.9% (wb). Within the said range it is observed the with increasing moisture content the linear dimension such as length, width and thickness increased. With an increase in moisture content, the geometrical mean diameter, arithmetic mean diameter, square mean diameter, and equivalent mean diameter increased from 1.39 to 1.65 mm, 1.65 to 1.98 mm, 2.30 to 3.09 mm and 1.73 to 1.98 mm, respectively. The coefficient friction for glass, mild steel surface, GI sheet, and plywood increased linearly from 0.365 to 0.398, 0.402 to 0.414, 0.396 to 0.412, and 0.339 to 0.357, respectively with an increase in moisture content. It was observed that plywood has the lowest coefficient friction whereas mild stee

Pearl millet, engineering properties, terminal velocity, aspect ratio, coefficient of friction

The present study provides a piece of comprehensive basic information about the engineering, frictional and aerodynamic properties of pearl millet grain for designing small scale post-harvest machinery especially a pearl millet thresher for small and marginal farmers which include the coefficient of friction for designing of sieve slope, angle of repose for designing of hopper and feeding chute, terminal velocity for designing of blower and aspirator and grain size (GMD, SMD, AMD & EQD) for designing of sieve openings, size of holes and concave clearance.

Panda, S. , Swain, S.K. , Behera, D., Mohanty, D.K., Mohapatra, A.K., Rayaguru, K. and Dash, A.K. (2021). Moisture Dependent Physical and Engineering Properties of Pearl Millet Grains. Biological Forum – An International Journal, 13(2): 345-351.