Spray deposition in a wind tunnel: a kinetic approach of wind speed effects
Résumé
The objective of this study is to contribute to the future revision of the ISO 22856 standard while comparing the results from different protocols in a wind tunnel. A long duration exposure of collectors using a distribution test bench was compared with the short duration exposure of Petri dishes by using a specific test bench. A wide range of wind speeds up to 7.5 m s-1 were tested depending on the protocol but the most comparable experimental conditions were found at 2 and 4 m s-1, frontal position of the boom at a height of 0.6 m. When normalized according to the sampling surface (groove vs Petri dishes), results were globally comparable from a quantitative point of view. Moreover, the response of the deposition value to a Time of Flight expression was comparable for both exposure protocols and allowed the simulation of the effect of the wind speed.