Numerical study for production of space charge within the stratiform cloud |
| |
Authors: | A K Srivastava S N Tripathi |
| |
Institution: | (1) State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Haidian District, 100084 Beijing, People’s Republic of China |
| |
Abstract: | One dimensional numerical model has been developed to predict the production of space charge and variations in other electrical
parameters within the low level stratiform type of cloud having very weak vertical motion. Non-linear coupled differential
equations which govern ion concentrations, charged and neutral droplet concentrations and electric field were used. Symmetry
has been observed in all the electrical parameters within the cloud. The magnitude of average positive ion concentrations
was observed to be high as compared to the negative ion concentrations, which is due to low scavenging rate of positive ions
than the negative ions, highly attributed to their mobilities. The rate of scavenging of ions affects the concentration of
charged droplets, which eventually influence the electric field and thus the space charge density within the cloud. Maximum
electric field (E
max) was observed at middle of the cloud whereas minimum was observed at both the edges of the cloud. Minimum electric field
(E
min) was found to be equal and constant (∼27 Vm−1) for any drop concentration. Net positive and negative space charges were observed at the top and bottom of the cloud, respectively.
The simulated results show some discrepancies to the natural condition, which are due to simulations made under some basic
assumptions and limitations and that will be incorporated in the future studies for natural cloud condition. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|