CFD-based pesticide selection for a nozzle used in a six-rotor UAV in hover mode for tea spraying.

Background: A key challenge for unmanned aerial vehicle (UAV) spraying sometimes used in tea plantations is the downwash flow structure there stronger than in crops. In addition, the UAV spray is affected by the relationship between the nozzle design and the pesticide. However, there is little current research on this aspect.