Event Details
Numerical Reflection, Attenuation, and Divergence Errors on Specific FDTD Meshes and Simple Recipes for Restoring the Physical Solutions
Presenter: Dr. Malgorzata Celuch - Warsaw University of Technology, Warsaw, POLAND
Supervisor:
Date: Wed, June 12, 2002
Time: 11:30:00 - 12:30:00
Place: EOW 430
ABSTRACT
Abstract
The talk is concerned with new interpretations of the FDTD dispersion characteristics. The effects of non-uniform meshing and point sources are considered. It is shown that non-uniform meshes give rise to amplitude errors associated with numerical reflections and/or attenuation. Point sources as applied in eigenvalue and radiation problems may violate the Gauss law and give rise to statis spurious modes. Simple recipes for suppressing those errors, enhancing the order of FDTD supra-convergence, and restoring the physical solutions are proposed and validated. The theory of S- and P-eigenmodes of the FDTD method is also briefly presented.
Biography
Dr. Celuch is an assistant professor at the Warsaw University of Technology and Vice-President of QWED Corporation. She received an International Baccalaureate from the United World College of the Atlantic, in 1983, M.Sc. and Ph.D. in Electronic Engineering from Warsaw University of Technology in 1988 and 1996, respectively. She contributed over 60 papers in refereed journal and has given numerous conference presentations. Her main professional interest is in numerical modeling of electromagnetic problems.
FREE AND OPEN TO THE PUBLIC
For Further Information Contact:
Dr. M.A. Stuchly (721 6029)