Investigation on the multi-mode spiral vortex cluster structure based on the hierarchical spectrum

基于层次谱的多模态螺旋涡团结构研究

• 批准号: 20560148
• 负责人: HORIUTI Kiyosi
• 金额: $ 3万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20560148/
• 关键词: 非平衡性; DNS; エネルギースペクトル; Kolmogorov則; Lundgren spiral vortex; 階層性; エネルギーカスケード; 粘弾性流体; 法線応力差; 一様乱流; spiral vortex

We conducted extraction of hierarchical-nonequilibrim energy spectrum in the turbulent field using the DNS and experimental measurement data. It is shown that nonequilibrium components with -7/3 and -9/3 powers resides in both data in addition to the equilibrium Kolmogorov -5/3 power component, but the -9/3 power component associates an algebraic- logarithmic correction. The role of the nonequilibrium spectrum in the generation of unsteady energy cascade is elucidated. The stretched-spiral vortices with 3 modes of configurations are identified in the DNS data, and the correlation between the generation process of the energy cascade and the formation process of the spiral vortex cluster by the instability cascade is revealed.

我们利用DNS和实验测量数据进行了湍流场分级非平衡能谱的提取。结果表明，两个数据中除了平衡态Kolmogorov-5/3幂分量外，还存在-7/3和-9/3幂的非平衡态分量，但-9/3幂分量与代数-对数校正有关。阐明了非平衡谱在非定常能量级联产生中的作用。在DNS数据中识别出了3种构型的拉伸螺旋涡，揭示了能量叶栅生成过程与不稳定叶栅形成螺旋涡团过程之间的相关性。

项目成果

Geometry of enstrophy and dissipation, grid resolution effects and proximity issues in turbulence

• DOI: 10.1017/s002211200800476x
• 发表时间: 2009-02
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: I. Bermejo-Moreno;D. Pullin;K. Horiuti

Multimode stretched spiral vortex and nonequilibrium energy spectrum in homogeneous shear flow turbulence

• DOI: 10.1063/1.3567252
• 发表时间: 2011-03
• 期刊: Physics of Fluids
• 影响因子: 4.6
• 作者: K. Horiuti;T. Ozawa

非平衡エネルギースペクトルによる1方程式SGSモデルの検証

非平衡能谱一方程SGS模型验证

• 发表时间: 2009
• 作者: 川村康太;堀内潔
• 通讯作者: 堀内潔

The multi-mode stretched spiral vortex in homogeneous isotropic turbulence

• DOI: 10.1017/s0022112007009251
• 发表时间: 2008-01-25
• 期刊: JOURNAL OF FLUID MECHANICS
• 影响因子: 3.7
• 作者: Horiuti, Kiyosi;Fujisawa, Takeharu
• 通讯作者: Fujisawa, Takeharu

Hierarchical energy spectra in quasi-steady turbulence.

准稳态湍流中的分层能谱。

• 发表时间: 2007
• 作者: K. Horiuti;and T. Fujisawa
• 通讯作者: and T. Fujisawa