Abstract
In previous work, the authors analyse the behaviour of the airflow-seed mixture in distributor heads of air drill seeders. Numerical simulations and laboratory tests performed on a commercial distributor head show similar results, and indicate that most seeds escape through the front outlets ducts. In this paper, the behaviour of a distributor head model, in different working conditions, is studied. The distributor head analysed is designed by the authors (Bourges et al, 2015). Constant air flow and two different sizes of seeds is simulated. In both cases, the seeds are modelled as spherical particles of homogeneous size. Soybean (Glycine max ) and amaranth.(Amaranthus cruentus) are used in numerical test.
