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A Macroscopic Model for First Return Stroke of Lightning
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-1607-2493
2011 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, Vol. 53, no 3, 782-791 p.Article in journal (Refereed) Published
Abstract [en]

A lightning return stroke model for a downward flash is proposed. The model includes underlying physical phenomena governing return stroke evolution, namely, electric field due to charge distributed along the leader and cloud, transient enhancement of series channel conductance at the bridging regime, and the nonlinear variation of channel conductance, which supports the return stroke current evolution. Thermal effects of free burning arc at the stroke wave front and its impact on channel conductance are studied. A first-order arc model for determining the dynamic channel conductance along with a field-dependent conductivity for corona sheath is used in the model. The model predicts consistent current propagation along the channel with regard to current amplitude and return stroke velocity. The model is also capable of predicting the remote electromagnetic fields that are consistent with the experimental observations.

Place, publisher, year, edition, pages
2011. Vol. 53, no 3, 782-791 p.
Keyword [en]
Current evolution, dynamic channel conductance, electromagnetic fields, lightning return stroke
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-39523DOI: 10.1109/TEMC.2010.2090663ISI: 000294131700026Scopus ID: 2-s2.0-80052065327OAI: oai:DiVA.org:kth-39523DiVA: diva2:441723
Available from: 2011-09-19 Created: 2011-09-12 Last updated: 2017-12-08Bibliographically approved

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Thottappillil, Rajeev

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