Agricultural pesticide spraying commonly involves atomizing a water mixture made up of active molecules and adjuvants. During this process, a part of the smallest droplets do not reach the plant but contribute to spray drift, contaminating air, water and soils. On the other hand, large or fast droplets can rebound on the leaves and decrease the treatment efficiency too. Thus, a precise study of the atomization process is needed. Most atomization models in agriculture are based on a Lagrangian approach, and assume that the mean diameter, of the droplets produced by the nozzle, are equal to the nozzle exit diameter. During present work, a eulerian model was developed to assess how the sprayed liquid is atomized into droplets with the aim of optimizing droplet size and velocity.