3-D model of electric field and space charge in the barbed plate-to-plate precipitator

Jane H. Davidson, Peter J. McKinney, Paul Linnebur

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


A finite element/method of characteristics model of 3-dimensional electrode geometries with corona discharge is used to predict space charge density, current density, electric potential and electric field in point-to-plane, single barb plate-to-plate, and hexagonal barbed plate-to-plate geometries. Although a modification of Peak's formula for the hyperboid-to-plane was initially used to establish a boundary condition at the edge of the corona, predicted total current did not agree with measured values. As a result, it was necessary to use measured current-voltage characteristics to establish the space charge density at the corona. An additional problem in modeling point discharges is specification of shape and size of the corona sheath. Both our results and much earlier work by Trichel suggest that the thickness of the corona sheath cannot be automatically neglected.

Original languageEnglish (US)
Pages (from-to)1634-1641
Number of pages8
JournalConference Record - IAS Annual Meeting (IEEE Industry Applications Society)
StatePublished - Dec 1 1994
EventProceedings of the 29th IAS Annual Meeting. Part 3 (of 3) - Denver, CO, USA
Duration: Oct 2 1994Oct 5 1994


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