Author(s): S.A. Al-Yahya and H.M.M. Moghazi
Article publication date: 1998-04-01
Vol. 16 No. 1 (yearly), pp. 223-239.
169
Keywords
airflow resistance, static pressure, barley grain
Abstract
An experimental study has been performed in order to measure drops in static pressure across columns of barley grain. It was designed to determine the effect of grain moisture content, grain depth, flow rate and bin diameter on resistance to airflow. Airflow ranging 2 from 0.1 to 0.7 m3 s-1 m-2 , moisture content levels of 8, 15, 17 and 21.7% (wet basis), bed depths of 31, 62, 93 and 124 cm and bin diameter of 15.24, 20.32 and 25.4 cm. Airflow resistance was accurately described by the well known Shedd's equation. Resistance to airflow decreased with increased grain moisture content and decreased airflow rate and bed depths. The airflow resistance increases as the decrease of the bin diameter especially at high grain moisture content.