DOI: 10.1002/grl.50457
论文题名: Why isolated streamer discharges hardly exist above the breakdown field in atmospheric air
作者: Sun A.B. ; Teunissen J. ; Ebert U.
刊名: Geophysical Research Letters
ISSN: 0094-8992
EISSN: 1944-8723
出版年: 2013
卷: 40, 期: 10 起始页码: 2417
结束页码: 2422
语种: 英语
英文关键词: 3D particle simulation
; background ionization
; electron detachment
; ionization screening time
; lightning inception
; streamer discharge
Scopus关键词: Analytical estimates
; Breakdown threshold
; Combined effect
; Electron detachments
; Natural backgrounds
; Particle simulations
; Streamer discharges
; Streamer formation
; Electric fields
; Three dimensional
; Ionization
; discharge
; electrical method
; electron
; ionization
; lightning
; morphology
; numerical model
; three-dimensional modeling
; threshold
; troposphere
英文摘要: We investigate streamer formation in the troposphere, in electric fields above the breakdown threshold. With fully three-dimensional particle simulations, we study the combined effect of natural background ionization and of photo-ionization on the discharge morphology. In previous investigations based on deterministic fluid models without background ionization, so-called double-headed streamers emerged. But in our improved model, many electron avalanches start to grow at different locations. Eventually, the avalanches collectively screen the electric field in the interior of the discharge. This happens after what we call the "ionization screening time," for which we give an analytical estimate. As this time is comparable to the streamer formation time, we conclude that isolated streamers are unlikely to exist in fields well above breakdown in atmospheric air. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879913868&doi=10.1002%2fgrl.50457&partnerID=40&md5=3dfcf204dcc16e0285ccd7fc1ddb3d51
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6256
Appears in Collections: 气候减缓与适应
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作者单位: Center for Mathematics and Computer Science (CWI), P.O. Box 94079, 1090 GB Amsterdam, Netherlands
Recommended Citation:
Sun A.B.,Teunissen J.,Ebert U.. Why isolated streamer discharges hardly exist above the breakdown field in atmospheric air[J]. Geophysical Research Letters,2013-01-01,40(10).