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Accession Number ADA586691
Title Towards High Resolution Numerical Algorithms for Wave Dominated Physical Phenomena.
Publication Date Jan 2009
Media Count 56p
Personal Author T. Warburton
Abstract During this project several new numerical algorithms were designed, analyzed, and implemented with the goal of accelerating computational experiments in time-domain electromagnetics and acoustics. Novel results include a new family of radiation boundary conditions used for truncating computational domains used in external scattering simulations. A new filter and also local time stepping method were created for stabilizing coarse temporal approximations for discontinuous Galerkin time-domain computations. In additional work a new tiling algorithm was developed allowing large numbers of polyomino tiles to be arranged to cover a two dimensional shape without leaving gaps. This abstract algorithm has application in the design of passive array antenna to minimize side-lobe radiation.
Keywords Acoustics
Antenna arrays
Antenna design
Boundary conditions
Electromagnetic fields
Electromagnetic radiation
Electromagnetic scattering
Galerkin method
High resolution
Mathematical filters
Tiling algorithms
Time domain

Source Agency Non Paid ADAS
NTIS Subject Category 72B - Algebra, Analysis, Geometry, & Mathematical Logic
46H - Radiofrequency Waves
Corporate Author Rice Univ., Houston, TX. Dept. of Computational and Applied Mathematics.
Document Type Technical report
Title Note Final rept. 1 Jul 2005-30 Nov 2008.
NTIS Issue Number 1405
Contract Number FA9550-05-1-0473

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