書誌事項
- タイトル別名
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- Effects of Mean Shear on Homogeneous Turbulence. Turbulence Statistics and Turbulence Models.
- イチヨウ ランリュウ ニ オケル センダン ノ エイキョウ トウケイテキ セイ
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説明
The effects of mean shear enforced on decaying isotropic turbulence have been investigated by numerical experiments with the direct numerical simulation (DNS) of Navier-Stokes equations. In flows rapidly distorted from isotropy, it is important to elucidate the behavior of turbulent quantities, in particular, the pressure-strain correlations contributing to the origin of the anisotropic state. The pressure-strain term in the Reynolds stress equations becomes positive only in the spanwise velocity fluctuations, and hence turbulence energy is extracted from components in both streamwise and shear directions. The redistribution process as well as the anisotropic behavior of turbulence statistics are accurately evaluated with a linear analysis based on the rapid distortion theory. Furthermore, from the assessment of turbulence models for pressure-strain correlations using the present DNS data, it is found that none of the existing models represent the energy sink from the shear direction except for a model using the Langevin equation, and the destruction of the Reynolds shear stress is described rather well using a classical linear model.
収録刊行物
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- 日本機械学会論文集B編
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日本機械学会論文集B編 60 (573), 1653-1660, 1994
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390282680872472576
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- NII論文ID
- 130004079475
- 110002393792
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- NII書誌ID
- AN00187441
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- ISSN
- 18848346
- 03875016
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- NDL書誌ID
- 3873965
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可