| タイトル | On the mathematical modeling of the Reynolds stress's equations |
| 著者（英） | Lin, Avi |
| 著者所属（英） | Temple Univ. |
| 発行日 | 1990-01-01 |
| 言語 | eng |
| 内容記述 | By considering the Reynolds stress equations as a possible descriptor of complex turbulent fields, pressure-velocity interaction and turbulence dissipation are studied as two of the main physical contributions to Reynolds stress balancing in turbulent flow fields. It is proven that the pressure interaction term contains turbulence generation elements. However, the usual 'return to isotropy' element appears more weakly than in the standard models. In addition, convection-like elements are discovered mathematically, but there is no mathematical evidence that the pressure fluctuations contribute to the turbulent transport mechanism. Calculations of some simple one-dimensional fields indicate that this extra convection, rather than the turbulent transport, is needed mathematically. Similarly, an expression for the turbulence dissipation is developed. The end result is a dynamic equation for the dissipation tensor which is based on the tensorial length scales. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 90A19878
AIAA PAPER 90-0498 |
| 権利 | Copyright |
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