| タイトル | Kolmogorov and scalar spectral regimes in numerical turbulence |
| 本文（外部サイト） | http://hdl.handle.net/2060/19850019952 |
| 著者（英） | Kerr, R. M. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1985-06-01 |
| 言語 | eng |
| 内容記述 | Velocity and passive-scalar spectra for turbulent fields generated by a forced three-dimensional simulation and Taylormicroscale Reynolds numbers up to 83 are shown to have distinct spectral regimes, including a Kolmogorov inertial subrange. Both one- and three-dimensional spectra are shown for comparison with experiment and theory, respectively. When normalized by the Kolmogorov dissipation scales velocity spectra collapse to a single curve and a high-wavenumber bulge is seen. The bulge leads to an artificially high Kolmogorov constant, but is consistent with recent measurements of the velocity spectrum in the dissipation regime and the velocity-derivative skewness. Scalar spectra, when normalized by the Oboukov-Corrsin scales, collapse to curves which depend only on Prandtl number and show a universal inertial-convective subrange, independent of Prandtl number. When normalized by the Batchelor scales, the scalar spectra show a universal dissipation regime which is independent of Prandtl numbers from 0.1 to 1.0. The time development of velocity spectra is illustrated by energy-transfer spectra in which distinct pulses propagate to high wavenumbers. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 85N28264
NASA-TM-86699
REPT-85160
NAS 1.15:86699 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/156241 |
