Influence of Insect Screen's Porosity on Greenhouse Climate: CFD Approach
The effect of insect screens of a tunnel greenhouse with tomato crop on airflow and temperature patterns was numerically investigated using a commercial computational fluid dynamics (CFD) code. Three commonly used types of insect screens in greenhouses were studied: (a) an anti-bemisia insect screen, (b) an anti-aphid screen and (c) an antithrip screen. The numerical model was firstly validated against experimental data collected in a greenhouse identical with the one used in simulations. A gradual increase of air temperature and a decrease of air velocity inside the greenhouse were observed as the porosity of the tested insect screen was reduced. The results for the air flow and temperature distributions are presented for an external wind speed 3 m/s .