Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/71748
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dc.contributorDepartment of Building Services Engineering-
dc.creatorChan, M-
dc.creatorChen, M-
dc.creatorDu, Y-
dc.date.accessioned2018-01-30T09:44:58Z-
dc.date.available2018-01-30T09:44:58Z-
dc.identifier.issn0169-8095-
dc.identifier.urihttp://hdl.handle.net/10397/71748-
dc.descriptionAnnual Assembly of Chinese Meteorological Society, Xian, China, 2-4 November 2016en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.rights© 2017 Elsevier B.V. All rights reserved.en_US
dc.rights© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.en_US
dc.rightsThe following publication Chan, M.-K., Chen, M., & Du, Y.-p. (2018). A macroscopic physical model for self-initiated upward leaders from tall grounded objects and its application. Atmospheric Research, 200, 13-24 is available at https://doi.org/10.1016/j.atmosres.2017.09.012.en_US
dc.subjectLeader initiationen_US
dc.subjectLeader modelingen_US
dc.subjectLeader propagationen_US
dc.subjectTall grounded objecten_US
dc.subjectUpward positive leaderen_US
dc.titleA macroscopic physical model for self-initiated upward leaders from tall grounded objects and its applicationen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage13-
dc.identifier.epage24-
dc.identifier.volume200-
dc.identifier.doi10.1016/j.atmosres.2017.09.012-
dcterms.abstractThis paper presents a macroscopic physical model that can simulate an upward leader initiated from a tall grounded object under thunderclouds. Based on a tri-layer leader channel structure and the energy conservation law, a new equation for estimating the upward leader propagation speed is proposed. Equations for modeling other physical parameters, such as the leader line charge density, leader core radius, leader corona sheath radius, leader current, leader electric field and leader conductance, are also proposed. Besides, a set of initiation and survival criteria for a steady self-initiated upward leader from a tall grounded object is suggested. Based on the suggested criteria and the proposed model, the critical corona and charge amount as well as the minimum height for successful initiation of an upward positive leader (UPL) from a tall grounded object are evaluated and discussed. The model is then used to investigate the general properties of UPLs self-initiated from tall grounded objects with and without the effect of corona space charge layer near the ground under different thunderstorm conditions. The modelling results can well explain the leader properties observed in literature. The model is further tested with two set of experiment data and very promising results are obtained.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationAtmospheric research, 1 Feb. 2018, v. 200, p. 13-24-
dcterms.isPartOfAtmospheric research-
dcterms.issued2018-02-01-
dc.identifier.scopus2-s2.0-85033456039-
dc.identifier.ros2016005744-
dc.relation.conferenceChinese Meteorological Society. Assembly-
dc.identifier.eissn1873-2895-
dc.identifier.rosgroupid2017005943-
dc.description.ros2017-2018 > Academic research: refereed > Publication in refereed journal-
dc.description.validatebcwh-
dc.description.oaAccepted Manuscripten_US
dc.identifier.FolderNumbera0806-n02en_US
dc.identifier.SubFormID1889en_US
dc.description.fundingSourceRGCen_US
dc.description.fundingTextPolyU 5123/12Een_US
dc.description.pubStatusPublisheden_US
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