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Determination of Current Within the Lightning Path in the Case of Lightning to a Tall Object
IEEE Transactions on Electromagnetic Compatibility, 2011Four model types that could be used to theoretically approximate lightning events currently exist. These are namely gas dynamic (physical) models, electromagnetic models, distributed-circuit models, and “engineering” models. In this paper, a modified transmission line (TL) “engineering” modeling approach, which incorporates the presence of a tall ...
Ivan Boev, Wasyl Janischewskyj
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Corona discharge at the tip of a tall object in the electric field of a thundercloud
Plasma Physics Reports, 2002Characteristics of a positive transient corona discharge near the tip of a tall solitary grounded object in the electric field of a thundercloud are studied analytically and numerically. The time evolution of the discharge current and the space distribution of the total electric field are simulated for different growth rates of the external field and ...
N. L. Aleksandrov +4 more
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Electric and magnetic fields at very close range from a lightning strike to a tall object
2008 Asia-Pacific Symposium on Electromagnetic Compatibility and 19th International Zurich Symposium on Electromagnetic Compatibility, 2008We show that the electric field generated by a lightning return stroke to a tall structure can change polarity at very close range, typically at distances of about one tenth of the height of the struck object. Such an inversion of polarity is theoretically explained using the equation derived by Baba and Rakov for the case when the return stroke wave ...
Abbas Mosaddeghi +3 more
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Electric Power Systems Research, 2014
We derive electric field expressions, associated with lightning strikes to a tall object, using the monopole (Continuity Equation) technique which is distinctly different from the traditional dipole (Lorentz Condition) technique. Expressions to calculate the charge density along the tall object and lightning channel based on the assumptions of the ...
Helin Zhou +2 more
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We derive electric field expressions, associated with lightning strikes to a tall object, using the monopole (Continuity Equation) technique which is distinctly different from the traditional dipole (Lorentz Condition) technique. Expressions to calculate the charge density along the tall object and lightning channel based on the assumptions of the ...
Helin Zhou +2 more
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Journal of Atmospheric and Solar-Terrestrial Physics, 2015
Abstract In this paper we have analyzed the effect of frequency dependent soil (FDS) on the lightning-induced voltages caused by lightning subsequent return stroke for strike to tall objects ranging from 100 m to 300 m. It is found that the effect of FDS on the induced voltages peak can be approximately ignored when the low frequency conductivity ...
Qilin Zhang, Yuan Chen, Wenhao Hou
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Abstract In this paper we have analyzed the effect of frequency dependent soil (FDS) on the lightning-induced voltages caused by lightning subsequent return stroke for strike to tall objects ranging from 100 m to 300 m. It is found that the effect of FDS on the induced voltages peak can be approximately ignored when the low frequency conductivity ...
Qilin Zhang, Yuan Chen, Wenhao Hou
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Atmospheric Research, 2014
Article history: Six downward negative flashes terminated on tall structures in Guangzhou are analyzed. The three-dimensional (3-D) lightning channels are reconstructed from dual-station optical observations. For each reconstructed 3-D upward connecting leader (UCL) channel, its 3-D length and speed are calculated.
Yan Gao +6 more
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Article history: Six downward negative flashes terminated on tall structures in Guangzhou are analyzed. The three-dimensional (3-D) lightning channels are reconstructed from dual-station optical observations. For each reconstructed 3-D upward connecting leader (UCL) channel, its 3-D length and speed are calculated.
Yan Gao +6 more
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IEEE Transactions on Electromagnetic Compatibility, 2015
In this paper we have studied the propagation effect of frequency-dependent soil (FDS) on the far vertical electric fields radiated by subsequent lightning strike to tall objects with heights from 50 to 300 m. It is found that the field propagation attenuation along FDS is obviously less than that case where the parameters are assumed to be constant ...
Qilin Zhang, Tongtong Ji, Wenhao Hou
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In this paper we have studied the propagation effect of frequency-dependent soil (FDS) on the far vertical electric fields radiated by subsequent lightning strike to tall objects with heights from 50 to 300 m. It is found that the field propagation attenuation along FDS is obviously less than that case where the parameters are assumed to be constant ...
Qilin Zhang, Tongtong Ji, Wenhao Hou
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3-D printer can build meter-tall objects in just a few hours
C&EN Global Enterprise, 2019A 3-D printer that stands 4 m tall can rapidly print large structures thanks to its innovative cooling system (Science 2019, DOI: 10.1126/science.aax1562). Three-dimensional printing has long been used for making one-off prototypes, but it’s beginning to move into manufacturing applications. Led by Chad A.
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IEEE Transactions on Electromagnetic Compatibility, 2022
Asmaa Lakhdar +2 more
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Asmaa Lakhdar +2 more
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2022 36th International Conference on Lightning Protection (ICLP), 2022
Mohamed Abdelghani Talbi +2 more
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Mohamed Abdelghani Talbi +2 more
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