| タイトル | Parallel Adjective High-Order CFD Simulations Characterizing SOFIA Cavity Acoustics |
| 本文（外部サイト） | http://hdl.handle.net/2060/20160006398 |
| 著者（英） | Brehm, Christoph; Barad, Michael F.; Kiris, Cetin C.; Biswas, Rupak |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 2016-05-16 |
| 言語 | eng |
| 内容記述 | This paper presents large-scale MPI-parallel computational uid dynamics simulations for the Stratospheric Observatory for Infrared Astronomy (SOFIA). SOFIA is an airborne, 2.5-meter infrared telescope mounted in an open cavity in the aft fuselage of a Boeing 747SP. These simulations focus on how the unsteady ow eld inside and over the cavity interferes with the optical path and mounting structure of the telescope. A temporally fourth-order accurate Runge-Kutta, and spatially fth-order accurate WENO- 5Z scheme was used to perform implicit large eddy simulations. An immersed boundary method provides automated gridding for complex geometries and natural coupling to a block-structured Cartesian adaptive mesh re nement framework. Strong scaling studies using NASA's Pleiades supercomputer with up to 32k CPU cores and 4 billion compu- tational cells shows excellent scaling. Dynamic load balancing based on execution time on individual AMR blocks addresses irregular numerical cost associated with blocks con- taining boundaries. Limits to scaling beyond 32k cores are identi ed, and targeted code optimizations are discussed. |
| NASA分類 | Instrumentation and Photography; Fluid Mechanics and Thermodynamics |
| レポートNO | ARC-E-DAA-TN27146 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
