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Thundercloud electrification models in atmospheric electricity and meteorology
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Parker, L. W. |
| Copyright Year | 1980 |
| Description | A survey is presented of presently-available theoretical models. The models are classified into three main groups: (1) convection models, (2) precipitation models, and (3) general models. The strengths and weaknesses of the models, their dimensionalities and degrees of sophistication, the nature of their inputs and outputs, and the various specific charging mechanisms treated by them, are considered. In results obtained to date, the convection models predict no significant electrification enhancement based on conductivity gradients and convection alone, with the assumed air circulation patterns. Results of the precipitation models show that the initial electrification can occur rapidly and stably through noninductive collision mechanisms involving ice, and breakdown-strength electric fields can relatively easily be achieved subsequently through the collisional-inductive mechanism. A critical difficulty of the collision mechanisms is imprecise knowledge of relaxation times versus contact times, which can easily lead to overestimates of electrification. The general model results tend to support those of the precipitation models in emphasizing the high potential effectiveness of the collisional-inductive mechanism. |
| File Size | 1543614 |
| Page Count | 37 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800015440 |
| Archival Resource Key | ark:/13960/t8tb5xg5n |
| Language | English |
| Publisher Date | 1980-03-01 |
| Access Restriction | Open |
| Subject Keyword | Meteorology And Climatology Cloud Physics Thunderstorms Atmospheric Models Collisions Precipitation Meteorology Cumulonimbus Clouds Electric Fields Atmospheric Electricity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
