NDLI: Characterization of an electrodynamic balance for suspending charged droplets

Content Provider	IEEE Xplore Digital Library
Author	Sloane, C.S. Elmuoursi, A.A.
Copyright Year	1972
Abstract	The electrical characteristics of an electrodynamic balance used for suspending charged droplets were determined by constructing a computer model based on the charge simulation technique. This device is traditionally constructed with hyperbolically shaped endcaps and ring electrodes since an analytical solution exists for the electric field in this geometry. Using the charge simulation technique, other electrode shapes (some with observation portals) were evaluated for their effectiveness in suspending and stabilizing droplets. In this stability study, the motion of a droplet within the electrodynamic balance was evaluated using a numerical solution of the equations of motion for a droplet in the calculated electrodynamic force field. Four shape attributes were considered: electrode curvature; chamber size and geometry; and electrode extension. Three end cap curvatures were examined: flat, hyperbolic, and more steeply curved. Two principal findings are: (1) viewing ports should be embedded within an axially symmetric groove, in which case they do not affect the function of the balance; and (2) the voltage needed to balance a particle against gravity is a strong function of the chamber geometry.<>
Sponsorship	IEEE Industry Applications Society
Starting Page	711
Ending Page	719
Page Count	9
File Size	820021
File Format	PDF
ISSN	00939994
Volume Number	25
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodynamics Electrodes Geometry Computational modeling Shape Electric variables Computer simulation Portals Stability Equations
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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