A comparison of different approaches to simulate a nonlinear channel resistance in lightning return stroke models

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Search: L773:2169 897X OR L773:2169 8996 OR L773:0148 0227 OR L773:2156 2202 > (2005-2009) > A comparison of dif...

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MARC

Fältnamn	Indikatorer	Metadata
000		02439naa a2200313 4500
001		oai:DiVA.org:uu-109162
003		SwePub
008		091009s2008 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-1091622 URI
024	7	a https://doi.org/10.1029/2007JD0093952 DOI
040		a (SwePub)uu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a De Conti, Alberto4 aut
245	1 0	a A comparison of different approaches to simulate a nonlinear channel resistance in lightning return stroke models
264	1	c 2008
338		a print2 rdacarrier
520		a Different physical models that describe the time variation of the channel resistance are investigated in a lightning return stroke model. Such models consider one of the three following hypotheses: (1) the channel resistance decays exponentially with time, (2) the channel resistance decays with the radial expansion of the channel core, which is assumed to be described by the strong-shock approximation, or (3) the channel resistance varies with time according to three different arc resistance models (defined by Toepler, Barannik and Kushner et al.). Analyses illustrate the effect of a time-varying channel resistance on channel currents and corresponding electromagnetic fields. It is shown that the strong-shock approximation is able to predict typical features of experimentally observed lightning electromagnetic fields and return stroke speed profiles. It is also shown that results predicted by the strong-shock approximation can be qualitatively reproduced by either using simplified arc resistance equations (such as Toepler's and Barannik's ones) or considering an exponential decay of the channel resistance with attenuation constants linearly increasing with height.
653		a TECHNOLOGY
653		a TEKNIKVETENSKAP
700	1	a Visacro, Silverio4 aut
700	1	a Theethayi, Nelsonu Uppsala universitet,Elektricitetslära4 aut0 (Swepub:uu)nethe133
700	1	a Cooray, Vernonu Uppsala universitet,Elektricitetslära4 aut0 (Swepub:uu)verncoor
710	2	a Uppsala universitetb Elektricitetslära4 org
773	0	t Journal of Geophysical Researchg 113:D14, s. D14129-q 113:D14<D14129-x 0148-0227x 2156-2202
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-109162
856	4 8	u https://doi.org/10.1029/2007JD009395

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