2017年8月
Integrated analysis of energy transfers in elastic-wave turbulence.
Physical review. E
- ,
- 巻
- 96
- 号
- 2-1
- 開始ページ
- 023106
- 終了ページ
- 023106
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevE.96.023106
- 出版者・発行元
- AMER PHYSICAL SOC
In elastic-wave turbulence, strong turbulence appears in small wave numbers while weak turbulence does in large wave numbers. Energy transfers in the coexistence of these turbulent states are numerically investigated in both the Fourier space and the real space. An analytical expression of a detailed energy balance reveals from which mode to which mode energy is transferred in the triad interaction. Stretching energy excited by external force is transferred nonlocally and intermittently to large wave numbers as the kinetic energy in the strong turbulence. In the weak turbulence, the resonant interactions according to the weak turbulence theory produce cascading net energy transfer to large wave numbers. Because the system's nonlinearity shows strong temporal intermittency, the energy transfers are investigated at active and moderate phases separately. The nonlocal interactions in the Fourier space are characterized by the intermittent bundles of fibrous structures in the real space.
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevE.96.023106
- ISSN : 2470-0045
- eISSN : 2470-0053
- PubMed ID : 28950497
- Web of Science ID : WOS:000408351700009