Abstract An isolated conducting sphere with rigid interface is used to model a water droplet, in order to investigate initiation process of streamer from a realistic hydrometeor. The method of image charge can then be adopted to calculate the electric field due to the space charge and its induced charge on the sphere. Numerical simulations show that initiation of negative streamers does not occur, but a steady corona discharge takes place around one tip of the sphere. This work provides a feasible method to study streamer initiation from real hydrometeors with rigid interface, and helps advance the initiation theory of lightning.

中文翻译：

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在亚击穿条件下从孤立的球形水凝物引发流注放电

摘要 为了研究真实水凝体中流注的引发过程，采用具有刚性界面的孤立导电球体对水滴进行建模。然后可以采用镜像电荷的方法来计算空间电荷及其在球体上的感应电荷产生的电场。数值模拟表明，不会出现负流光，但在球体的一个尖端周围会发生稳定的电晕放电。这项工作为研究具有刚性界面的真实水凝物引发的拖缆提供了一种可行的方法，有助于推进闪电的引发理论。