| タイトル | Re-evaluation of an Optimized Second Order Backward Difference (BDF2OPT) Scheme for Unsteady Flow Applications |
| 本文（外部サイト） | http://hdl.handle.net/2060/20100002944 |
| 著者（英） | Vatsa, Veer N.; Carpenter, Mark H.; Lockard, David P. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 2009-12-18 |
| 言語 | eng |
| 内容記述 | Recent experience in the application of an optimized, second-order, backward-difference (BDF2OPT) temporal scheme is reported. The primary focus of the work is on obtaining accurate solutions of the unsteady Reynolds-averaged Navier-Stokes equations over long periods of time for aerodynamic problems of interest. The baseline flow solver under consideration uses a particular BDF2OPT temporal scheme with a dual-time-stepping algorithm for advancing the flow solutions in time. Numerical difficulties are encountered with this scheme when the flow code is run for a large number of time steps, a behavior not seen with the standard second-order, backward-difference, temporal scheme. Based on a stability analysis, slight modifications to the BDF2OPT scheme are suggested. The performance and accuracy of this modified scheme is assessed by comparing the computational results with other numerical schemes and experimental data. |
| NASA分類 | Fluid Mechanics and Thermodynamics |
| レポートNO | AIAA Paper 2010-0122
LF99-8943 |
| 権利 | No Copyright |
