| タイトル | Single point modeling of rotating turbulent flows |
| 本文（外部サイト） | http://hdl.handle.net/2060/19950014643 |
| 著者（英） | Hadid, A. H.; Mansour, N. N.; Zeman, O. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1994-12-01 |
| 言語 | eng |
| 内容記述 | A model for the effects of rotation on turbulence is proposed and tested. These effects which influence mainly the rate of turbulence decay are modeled in a modified turbulent energy dissipation rate equation that has explicit dependence on the mean rotation rate. An appropriate definition of the rotation rate derived from critical point theory and based on the invariants of the deformation tensor is proposed. The modeled dissipation rate equation is numerically well behaved and can be used in conjunction with any level of turbulence closure. The model is applied to the two-equation kappa-epsilon turbulence model and is used to compute separated flows in a backward-facing step and an axisymmetric swirling coaxial jets into a sudden expansion. In general, the rotation modified dissipation rate model shows some improvements over the standard kappa-epsilon model. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 95N21060 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/108531 |
