The experiment was conducted to determine the airflow resistance of lathyrus. The raw material was brought from a university farm. Airflow resistances of three varieties of lathyrus (cv. NLK-40, Pratik and Ratan) were studied with a laboratory instrument at moisture content of 7.33 to 18.80, 6.75 to 18.30 and 7.90 to 19.40% (d.b.) for superficial air velocities ranging from 0.04 to 1.26, 0.04 to 1.40 and 0.04 to 1.48 m3 s-1 m-2 at bed depths of 0.2 to 0.6 m with bulk density ranging from 805 to 895, 795 to 875 and 770 to 850 kg m-3, respectively. The airflow resistance of lathyrus increased with increase in airflow rate, bulk density, bed depth and decreased with moisture content. Modified Shedd equation, Hukill and Ives equation and modified Erguns equation were examined for pressure drop prediction. Airflow resistance was accurately described by modified Shedd equation followed by Hukill and Ives equation and modified Erguns equation. The developed statistical model, comprising airflow rate, moisture content and bulk density, could fit the pressure drop data reasonably well.
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