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Control of Drop Size Distribution Through Emulsions

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DOI: 10.23977/jmcs.2022.010102 | Downloads: 1 | Views: 304


Dongyue Wang 1


1 Experimental High School Attached to Beijing Normal University, Beijing, China

Corresponding Author

Dongyue Wang


Modern agriculture has been relying on the use of liquid pesticides and fertilizer and these solutions are usually sprayed onto crops. Whether spraying by hand, drones or airplanes, there can be a substantial amount of liquid droplets that are too small and drift by currents in the air away from the targeted crop. Therefore, controlling drop size distribution of sprayed droplets is important for enhancing the efficiency of agrochemical applications. In previous studies, researchers controlled droplet size by altering the nozzle pressure [1], and pressure-and-nozzle combinations [2], as well as the viscoelasticity of the liquid by adding polymers [3]. In this paper, the fluid mechanical response of the liquid to be sprayed is adjusted by formulating oil-and-water emulsions. The presence of such oil-water interfaces introduces a viscoelastic response through the restoring force of surface tension. By analyzing the drop size distribution as a function of the volume fraction of oil in water, it is found that the distributions can be shifted toward maximal size of droplets. In this work, using silicone oil-water combinations, the maximum drop size occurred in the vicinity of 40% by volume of silicone oil.


Surface tension, water, drop distribution, silicon oil, edge computing


Dongyue Wang, Control of Drop Size Distribution Through Emulsions. Journal of Modern Crop Science (2022) Vol. 1: 4-23. DOI:


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