| タイトル | Structure of turbulence at high shear rate |
| 著者（英） | Kim, John; Lee, Moon Joo; Moin, Parviz |
| 著者所属（英） | Stanford Univ.|NASA Ames Research Center |
| 発行日 | 1990-07-01 |
| 言語 | eng |
| 内容記述 | The structure of homogeneous turbulence subject to high shear rate has been investigated by using three-dimensional, time-dependent numerical simulations of the Navier-Stokes equations. This study indicates that high shear rate alone is sufficient for generation of the streaky structures, and that the presence of a solid boundary is not necessary. Evolution of the statistical correlations is examined to determine the effect of high shear rate on the development of anisotropy in turbulence. It is shown that the streamwise fluctuating motions are enhanced so profoundly that a highly anisotropic turbulence state with a 'one-component' velocity field and 'two-component' vorticity field develops asymptotically as total shear increases. Because of high-shear rate, rapid distortion theory predicts remarkably well the anisotropic behavior of the structural quantities. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 90A42643 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/355004 |
