| Exact time scale of energy exchange in triad interactions of homogeneous isotropic turbulence | |
Wu T1; Fang L1,2 ; Wang Z(王展)3
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| Corresponding Author | Fang, L.([email protected]) |
| Source Publication | PHYSICS OF FLUIDS
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| 2021-03-01 | |
| Volume | 33Issue:3Pages:12 |
| ISSN | 1070-6631 |
| Abstract | We solve analytically the period of a single triad interaction of homogeneous isotropic turbulence. Comparing with the traditional concept of the timescale of energy transfer, we found that this period is a timescale of energy exchange among the three wave vectors of a triad. Quantitatively, the timescale of energy exchange is usually longer if the equilibrium dissipation law is satisfied; however, when energy transfer is suppressed, the energy exchange becomes dominant. We extract the periods in typical numerical experiments of triad interactions and show that they are in good agreement with theoretical predictions. This picture implies that energy exchange corresponds to oscillation, while energy transfer corresponds to damping, and the damping rate is correlated with the oscillation. The present results of the timescale of energy transfer are expected to be applied in nonequilibrium turbulent flows. |
| DOI | 10.1063/5.0041020 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000629635400003 |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | National Natural Science Foundation of China[11572025] ; National Natural Science Foundation of China[11772032] ; National Natural Science Foundation of China[51420105008] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040203] |
| Funding Organization | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| Classification | 一类/力学重要期刊 |
| Ranking | 3 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/86321 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Beihang Univ, Ecole Cent Pekin, LMP, Beijing 100191, Peoples R China; 2.Beihang Hangzhou Inst Innovat Yuhang, Hangzhou 310000, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Wu T,Fang L,Wang Z. Exact time scale of energy exchange in triad interactions of homogeneous isotropic turbulence[J]. PHYSICS OF FLUIDS,2021,33,3,:12. |
| APA | Wu T,Fang L,&王展.(2021).Exact time scale of energy exchange in triad interactions of homogeneous isotropic turbulence.PHYSICS OF FLUIDS,33(3),12. |
| MLA | Wu T,et al."Exact time scale of energy exchange in triad interactions of homogeneous isotropic turbulence".PHYSICS OF FLUIDS 33.3(2021):12. |
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| Jp2021154.pdf（3299KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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