Study of the effect of moisture on terminal velocity of the grain in some common paddy rice varieties in Iran

الملخص EN

Grain terminal velocity (TV) is one of the aerodynamic properties of the grain that plays a key role in the design of transfer and separation of mix of materials machines.

In this study, this element was calculated theoretically in three varieties of rice husk (Khazar, Hashemi and Hybrid) in terms of grain moisture content (10, 14, 18 and 22 % w.b.) and then was analyzed and evaluated.

The results showed that Hashemi and Hybrid, respectively, have the most (10.832 m/s) and the least (9.816 m / s) mean values in grain TV.

By changing the grain moisture content from 10 to 22 % w.b., the mean TV increased significantly from 9.228 m/s to 11.336 m / s.

The highest amount of average TV (12.245 m/s) was obtained in tests with Hashemi moisture content of 22 % w.b.

and the lowest (9.128 m / s) in the tests with Khazar variety with a moisture content of 10% w.b.