Airflow Resistance of Wheat and Barley Affected by Airflow Direction, Filling Method and Dockage

ABSTRACT RESISTANCE to airflow was measured in cleaned and uncleaned wheat and cleaned barley. At an air velocity of 0.077 m/s resistances to vertical airflow compared with horizontal airflow were up to 60% higher for wheat and 115% for barley. Based on an air velocity of 0.077 m/s airflow resistances for layer filling (e.g. similar to filling a bin with a spreader) were higher than end filling (e.g. similar to filling a bin with stationary spout) by 25 to 35% for vertical airflow and 50 to 75% for horizontal airflow.