| タイトル | The application of preconditioning in viscous flows |
| 著者（英） | Merkle, C. L.; Choi, Y.-H. |
| 著者所属（英） | NASA Lewis Research Center; NASA Headquarters |
| 発行日 | 1993-04-01 |
| 言語 | eng |
| 内容記述 | The present time-derivative preconditioning algorithm is effective in flow conditions ranging from inviscid to very diffusive flows, as well as low subsonic to supersonic flow velocities. By means of a preconditioning matrix that (1) introduces well-conditioned eigenvalues and (2) avoids nonphysical time reversals for viscous flows, a mechanism is obtained which controls the inviscid and viscous time-step parameters at very diffusive flows. These capabilities are demonstrated for a variety of sample problems; convergence rates of solutions that are indistinguishable from those obtained without preconditioning are shown to be accelerated by as much as two orders of magnitude. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 93A32627 |
| 権利 | Copyright |
