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Experimental investigation of the kinetic energy cascade in homogeneous and isotropic turbulence

文献类型：期刊论文

作者Li T(李拓)1,2; Li XY(李心阳)1,2; Lian H(连欢)2
刊名PHYSICS OF FLUIDS
出版日期2025-06-01
卷号37期号:6页码:11
ISSN号1070-6631
DOI10.1063/5.0267459
通讯作者Lian, Huan(hlian@imech.edu.cn)
英文摘要The energy cascade phenomenon is studied in experiments of three-dimensional homogeneous and isotropic turbulence. The instantaneous dissipation rates epsilon derived from the third-order velocity structure function equivalent to <([u(x+l)-u(x)]l/l)(3)]>=-4/5l and the instantaneous energy flux Phi(l)(x, t) derived from the local cascade rate present both positive and negative values, suggesting the existence of forward and backward cascading. The scale dependence of the energy cascading is examined with discussions on the dominant flow structures. The inverse energy cascade is more probable in the inertial range compared to in the dissipation range. Quantified by the dissipation rate epsilon and the local energy flux Phi(l)(x, t), the forward and inverse energy cascading are found to be spatially scale dependent. The temporal correlation is examined by the metric of Shannon entropy. The energy cascading quantified by the dissipation epsilon and the energy flux Phi(l)(x, t) are found to be temporally independent in the current experiments with the Shannon entropy close to unity. In addition, the highest positive values of appear in regions with high strain rates and low rotation rates, which indicates positive correlation between strain rate and the local energy flux Phi(l)(x, t).
分类号一类/力学重要期刊
WOS关键词INVERSE ENERGY ; RESOLUTION ; VELOCITY
资助项目National Natural Science Foundation of China10.13039/501100001809[91941104] ; National Natural Science Foundation of China10.13039/501100001809[11872366] ; National Natural Science Foundation of China
WOS研究方向Mechanics ; Physics
语种英语
WOS记录号WOS:001505523200009
资助机构National Natural Science Foundation of China10.13039/501100001809 ; National Natural Science Foundation of China
其他责任者连欢
源URL[http://dspace.imech.ac.cn/handle/311007/101814]  
专题力学研究所_高温气体动力学国家重点实验室
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Li T,Li XY,Lian H. Experimental investigation of the kinetic energy cascade in homogeneous and isotropic turbulence[J]. PHYSICS OF FLUIDS,2025,37(6):11.
APA 李拓,李心阳,&连欢.(2025).Experimental investigation of the kinetic energy cascade in homogeneous and isotropic turbulence.PHYSICS OF FLUIDS,37(6),11.
MLA 李拓,et al."Experimental investigation of the kinetic energy cascade in homogeneous and isotropic turbulence".PHYSICS OF FLUIDS 37.6(2025):11.

入库方式： OAI收割

来源：力学研究所

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