| 1. |
- Perera, Chandana, et al.
(author)
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Analysis of Channel Tortuosity using 8 m Long Laboratory Sparks
- 2018
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In: 34th International Conference on Lightning Protection (ICLP 2018). - : IEEE. - 9781538666357
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Conference paper (peer-reviewed)abstract
- The tortuosity of the channel is defined as "Mean absolute angle change of the angle change and it measures how strongly the tortuous path of the channel of lightning/laboratory spark is twisting. 8 m Long laboratory sparks and high speed (20000 frames per second) technology used for this experiment. Using these data it has been calculated the channel tortuosity of 8 m long sparks and vertical profile of channel tortuosity. In addition to that spectral analysis of the angel change of the twisting path of the channel has been done in this study.
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| 2. |
- Perera, Chandana, et al.
(author)
-
Continuing Currents and Luminosity of Cloud Flashes
- 2014
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In: 2014 INTERNATIONAL CONFERENCE ON LIGHTNING PROTECTION (ICLP). - : IEEE conference proceedings. - 9781479935444 ; , s. 1587-1593
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Conference paper (peer-reviewed)abstract
- In this study, continuing currents and luminosity of cloud flashes were investigated using time resolve photographic technique. In ground flashes, the flow of current after the end of the return stroke is called the continuing currents. Typical cloud flashes have two stages called early stage (or active stage) and final or late stage. The continuing current and luminosities reported in this paper are observed in late stage of the cloud flashes. In ground flashes the shortest reported duration of continuing current is longer than the 3 ms. For the first time in literature the continuing currents in cloud flashes were studied. No major difference between the time duration of continuing currents of ground flashes and long current variation of cloud flashes were observed.
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