Efficient technique for calculating near-fields due to 2-D sources

Download
Author
Rostant, Richard A.
Date
1990-12Advisor
Janaswamy, Ramakrishna
Second Reader
Morgan, Michael A.
Metadata
Show full item recordAbstract
Numerous methods exist to calculate near-fields from two-dimensional objects, however, relatively long computation times are generally required for reasonable accuracy. Computation is slowed primarily due to the calculation of near-fields using a singular kernel. The proposed work will develop an alternate, more efficient algorithm for calculating the near-fields from surface distributions. The Singularity Extraction Technique (SET) analytically extracts the contribution due to the near-singularity and implements the remaining portion numerically. Additionally, field contributions due to regions far removed from the field point are extracted out to further reduce the computational time. The implications here are a significant reduction in CPU time as well as improved accuracy. Computer programs are developed to implement and validate the SET. Testing includes comparison of the SET with analytic solutions to electromagnetic scattering for typical objects.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
Related items
Showing items related by title, author, creator and subject.
-
The assimilation of satellite altimeter data into a global eddy resolving ocean model
Tokmakian, Robin Telrud (Monterey, California. Naval Postgraduate School, 1997-06);Two assimilation experiments have been conducted using the Semtner/Chervin Parallel Ocean Climate Model at 1/40 resolution to investigate the dynamical changes which occur with the application of the nudging method to ... -
A description of tropical cyclone recurvature in terms of isentropic potential vorticity
Boerlage, Andrew P. (Monterey, California. Naval Postgraduate School, 1989-06);Isentropic potential vorticity (IPV) fields calculated from the Na\7 Operational Regional Atmospheric Prediction System are analyzed to determine their usefulness as an aid to tropical cyclone recurvature forecasts. The ... -
Magnetic fields generated by internal ocean seawater motion
Davis, Charles A. (Monterey, California. Naval Postgraduate School, 1991-12);This thesis models induced magnetic fields from the motion of seawater in the Earth's magnetic field analytically and compares the results to arctic on-the-ice magnetic fluctuation measurements. The oceans have various ...