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An FDTD Model for Low and High Lightning Generated Electromagnetic Fields
By
Svetlana Knyazeva
_______________________________________________________________________
A Thesis Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF ARTS
(APPLIED MATHEMATICS)
May 2013
Copyright 2013 Svetlana Knyazeva
Object Description
| Title | An FDTD model for low and high lightning generated electromagnetic fields |
| Author | Knyazeva, Svetlana |
| Author email | knyazeva@usc.edu;svetlana_i_k@yahoo.com |
| Degree | Master of Arts |
| Document type | Thesis |
| Degree program | Applied Mathematics |
| School | College of Letters, Arts And Sciences |
| Date defended/completed | 2013-03-29 |
| Date submitted | 2013-04-29 |
| Date approved | 2013-04-29 |
| Restricted until | 2013-04-29 |
| Date published | 2013-04-29 |
| Advisor (committee chair) | Wang, Chunming |
| Advisor (committee member) |
Schumitzky, Alen Sacker, Robert |
| Abstract | One of the natural sources of the electric current is the lightning discharge in the ionosphere. The electro-magnetic wave produced by intense lightning, like sprites, can significantly alter electrostatic, electromagnetic, acoustic, radar, and radio-frequency measurements in ionosphere and on the ground. There are numerous studies performed on the sprites and other types of lightning discharge activities. This study concentrates on very low frequency (VLF, 3-20 kHz) and extremely low frequency (ELF, 3-3000 Hz) electromagnetic waves radiated by lightning currents. These frequencies have very low attenuation rate and make the ground a good enough conductor where the radio wave arrives at the surface entering the ground nearly independent of the incident angle. The Earth curvature can be neglected for frequencies up to ~12 kHz since the wave incident angles are very small. Method being used is Finite-Difference Time-Domain (FDTD) in the two-dimensional cylindrical simulation environment. Surface impedance boundary condition is used for the air-ground interface; and Nearly Perfect Match Layer is implemented as absorbing boundary condition on the top and sides of the simulation domain. |
| Keyword | FDTD; electromagnetic wave; lightning; finite-difference time-domain; nearly perfect match layer; low frequency; lightning discharge |
| Language | English |
| Format (imt) | application/pdf |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m |
| Contributing entity | University of Southern California |
| Rights | Knyazeva, Svetlana |
| Access conditions | The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given. |
| Repository name | University of Southern California Digital Library |
| Repository address | USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA |
| Repository email | cisadmin@usc.edu |
| Filename | etd-KnyazevaSv-1628.pdf |
| Archival file | uscthesesreloadpub_Volume7/etd-KnyazevaSv-1628.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Full text | An FDTD Model for Low and High Lightning Generated Electromagnetic Fields By Svetlana Knyazeva _______________________________________________________________________ A Thesis Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree MASTER OF ARTS (APPLIED MATHEMATICS) May 2013 Copyright 2013 Svetlana Knyazeva |
