The Study of ANSYS/FLOTRAN Application in 3 Dimension Steady Simulation of Airflow Field in Greenhouse

ANSYS/FLOTRAN software was used to research Mechanically Ventilated Multi-span Plastic Greenhouse's 3-D steady simulation of airflow field under different opening extent of frontispiece door in north china.This study based on Navier-Stokes equation model for determining the effect of frontispiece extent on indoor airflow.The indoor airflow average speed was analyzed according to the airflow speed testing result of every spot in greenhouse.Simulation result indicated that,when the opening extent was 2.3×2 m2,could made indoor wind speed too fast,flow field distribute turbulent,when the opening extent was 2.3×3 m2,indoor average wind speed was too slow to satisfy the requirement of ventilation.Whereas,when the opening extent was 2.3×2.4 m2,airflow field distributed more uniform under same condition,average wind speed come to the fastest and get perfect ventilation effect.