Modeling non-uniform airflow distribution in large grain silos using fluent

Based on Fluent software,simulate non-uniform airflow through large grain storage silos using Ergun′s equation.By describing material properties of a grain mass such as porosity and fines concentration and setting mathematical models,study the air-flow process of two cases,namely peaked grain with perforated floor ventilation and leveled grain with ring duct ventilation,obtain changes of velocity and static pressure.The results showed that peaked grain with perforated floor ventilation increased the resistance in silo center vertical direction,and in leveled grain with ring duct ventilation the air flow spread along the bottom of the silo wall,leading to non-uniform airflow.Investigation for non-uniform airflow,it′s significant to serve grain storage.