NDLI: Electrostatic Deposition of Pesticide Sprays onto Ionizing Targets: Charge- and Mass-Transfer Analysis

Content Provider	IEEE Xplore Digital Library
Author	Law, S. Edward Lane, Michael D.
Copyright Year	1972
Abstract	Electrostatic deposition of charged pesticide sprays onto biological targets may be undesirably limited under certain operational conditions by gaseous-discharge currents induced to flow between the incoming charged spray cloud and grounded points on the target (e.g. leaf tips). Spray deposition and charge transfer onto idealized target models as functions of target characteristics and intensity of spray-droplet charging are quantified experimentally to achieve a more fundamental understanding of this phenomenon. As compared to similar uncharged sprays, deposition onto smooth spherical, and planar targets was increased up to seven-fold and three-fold, respectively, at optimum spray-charge levels. Space-charge induced target ionization from a 20-mm point protrustion self-limited this electrostatic deposition to only a 3.5-fold increase for the spherical target but caused little reduction for the planar target. As compared with a hydraulic-atomizing nozzle, the charging nozzle increased deposition approximately eight-fold and 24-fold, respectively, onto the spherical and the planar targets. The ratios of charge-to-mass collected on all targets were unexpectedly found to exceed values calculated for the airborne charged-droplet cloud, indicating a possible contact-discharge during elastic collision of conductive droplets at the target.
Sponsorship	IEEE Industry Applications Society
Starting Page	673
Ending Page	679
Page Count	7
File Size	2729366
File Format	PDF
ISSN	00939994
Volume Number	IA-18
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1982-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spraying Electrostatic analysis Clouds Charge transfer Agricultural engineering Ionization Design engineering Plants (biology) Industry Applications Society Electric potential
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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