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DOI | 10.1016/j.atmosres.2017.09.012 |
A macroscopic physical model for self-initiated upward leaders from tall grounded objects and its application | |
Chan, Ming-Kit; Chen, Mingli; Du, Ya-ping | |
2018-02-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 200页码:13-24 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | This 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. |
英文关键词 | Leader initiation Leader propagation Leader modeling Tall grounded object Upward positive leader |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416394400002 |
WOS关键词 | LIGHTNING DISCHARGES ; PROPAGATION MODEL ; POSITIVE LEADERS ; DENSITY ; WINTER ; JAPAN |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/38208 |
专题 | 地球科学 |
作者单位 | Hong Kong Polytech Univ, Dept Bldg Serv Engn, Kowloon, Hong Kong, Peoples R China |
推荐引用方式 GB/T 7714 | Chan, Ming-Kit,Chen, Mingli,Du, Ya-ping. A macroscopic physical model for self-initiated upward leaders from tall grounded objects and its application[J]. ATMOSPHERIC RESEARCH,2018,200:13-24. |
APA | Chan, Ming-Kit,Chen, Mingli,&Du, Ya-ping.(2018).A macroscopic physical model for self-initiated upward leaders from tall grounded objects and its application.ATMOSPHERIC RESEARCH,200,13-24. |
MLA | Chan, Ming-Kit,et al."A macroscopic physical model for self-initiated upward leaders from tall grounded objects and its application".ATMOSPHERIC RESEARCH 200(2018):13-24. |
条目包含的文件 | 条目无相关文件。 |
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