| タイトル | Far field expansion for anisotropic wave equations |
| 本文（外部サイト） | http://hdl.handle.net/2060/19890016804 |
| 著者（英） | Hariharan, S. I.; Hagstrom, Thomas |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1989-06-01 |
| 言語 | eng |
| 内容記述 | A necessary ingredient for the numerical simulation of many time dependent phenomena in acoustics and aerodynamics is the imposition of accurate radiation conditions at artificial boundaries. The asymptotic analysis of propagating waves provides a rational approach to the development of such conditions. A far field asymptotic expansion of solutions of anisotropic wave equations is derived. This generalizes the well known Friedlander expansion for the standard wave operator. The expansion is used to derive a hierarchy of radiation conditions of increasing accuracy. Two numerical experiments are given to illustrate the utility of this approach. The first application is the study of unsteady vortical disturbances impinging on a flat plate; the second is the simulation of inviscid flow past an impulsively started cylinder. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 89N26175
NAS 1.15:102112
E-4882
NASA-TM-102112
ICOMP-89-14 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/141341 |
