On final states of two-dimensional decaying turbulence

doi:10.1063/1.1811132

CSpace

	On final states of two-dimensional decaying turbulence
	Yin, Z
	2004-12-01
发表期刊	PHYSICS OF FLUIDS
ISSN	1070-6631
卷号	16 期号:12 页码:4623-4634
摘要	Numerical and analytical studies of final states of two-dimensional (2D) decaying turbulence are carried out. The first part of this work is trying to give a definition for final states of 2D decaying turbulence. The functional relation of omega-psi, which is frequently adopted as the characterization of those final states, is merely a sufficient but not necessary condition; moreover, it is not proper to use it as the definition. It is found that the method through the value of the effective area S covered by the scatter omega-psi plot, initially suggested by Read, Rhines, and White ["Geostrophic scatter diagrams and potential vorticity dynamics," J. Atmos. Sci. 43, 3226 (1986)] is more general and suitable for the definition. Based on this concept, a definition is presented, which covers all existing results in late states of decaying 2D flows (including some previous unexplainable weird double-valued omega-psi scatter plots). The remaining part of the paper is trying to further study 2D decaying turbulence with the assistance of this definition. Some numerical results, leading to "bar" final states and further verifying the predictive ability of statistical mechanics [Yin, Montgomery, and Clercx, "Alternative statistical-mechanical descriptions of decaying two-dimensional turbulence in terms of patches and points," Phys. Fluids 15, 1937 (2003)], are reported. It is realized that some simulations with narrow-band energy spectral initial conditions result in some final states that cannot be very well interpreted by the statistical theory (meanwhile, those final states are still in the scope of the definition). (C) American Institute of Physics.
DOI	10.1063/1.1811132
语种	英语
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
WOS记录号	WOS:000225199200033
出版者	AMER INST PHYSICS
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/19476
专题	中国科学院数学与系统科学研究院
通讯作者	Yin, Z
作者单位	1.Eindhoven Univ Technol, Fluid Dynam Lab, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands 2.Chinese Acad Sci, LSEC, Acad Math & Syst Sci, Beijing 100080, Peoples R China 3.Chinese Acad Sci, ICMSEC, Acad Math & Syst Sci, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Yin, Z. On final states of two-dimensional decaying turbulence[J]. PHYSICS OF FLUIDS,2004,16(12):4623-4634.
APA	Yin, Z.(2004).On final states of two-dimensional decaying turbulence.PHYSICS OF FLUIDS,16(12),4623-4634.
MLA	Yin, Z."On final states of two-dimensional decaying turbulence".PHYSICS OF FLUIDS 16.12(2004):4623-4634.