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Overcoming geometry-induced stiffness with implicit-explicit (imex) runge-kutta algorithms on unstructured grids with applications to cem, cfd, and caa
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kanevsky, Alex |
| Copyright Year | 2004 |
| Description | My goal is to develop and implement efficient, accurate, and robust Implicit-Explicit Runge-Kutta (IMEX RK) methods [9] for overcoming geometry-induced stiffness with applications to computational electromagnetics (CEM), computational fluid dynamics (CFD) and computational aeroacoustics (CAA). IMEX algorithms solve the non-stiff portions of the domain using explicit methods, and isolate and solve the more expensive stiff portions using implicit methods. Current algorithms in CEM can only simulate purely harmonic (up to lOGHz plane wave) EM scattering by fighter aircraft, which are assumed to be pure metallic shells, and cannot handle the inclusion of coatings, penetration into and radiation out of the aircraft. Efficient MEX RK methods could potentially increase current CEM capabilities by 1-2 orders of magnitude, allowing scientists and engineers to attack more challenging and realistic problems. |
| File Size | 379912 |
| Page Count | 9 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050226977 |
| Archival Resource Key | ark:/13960/t73v4j49j |
| Language | English |
| Publisher Date | 2004-01-01 |
| Access Restriction | Open |
| Subject Keyword | Numerical Analysis Algorithms Computational Fluid Dynamics Unstructured Grids Mathematics Wave Scattering Runge-kutta Method Computational Electromagnetics Stiffness Aeroacoustics 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 |
