Time Correlations Of Pressure In Isotropic Turbulence

doi:10.1063/1.2870111

IMECH-IR > 力学所知识产出(1956-2008)

	Time Correlations Of Pressure In Isotropic Turbulence
	Yao HD(姚华栋); He GW(何国威); Wang M; Zhang X(张星); He, GW (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.
发表期刊	Physics of Fluids
	2008
页码	025105(1-4)
ISSN	1070-6631
摘要	The time correlations of pressure modes in stationary isotropic turbulence are investigated under the Kraichnan and Tennekes "random sweeping" hypothesis. A simple model is obtained which predicts a universal form for the time correlations. It implies that the decorrelation process of pressure fluctuations in time is mainly dominated by the sweeping velocity, and the pressure correlations have the same decorrelation time scales as the velocity correlations. These results are verified using direct numerical simulations of isotropic turbulence at two moderate Reynolds numbers; the mode correlations collapse to the universal form when the time separations are scaled by wavenumber times the sweeping velocity, and the ratios of the correlation coefficients of pressure modes to those of velocity modes are approximately unity for the entire range of time separation. (c) 2008 American Institute of Physics.
关键词	Statistics Simulation Spectra
DOI	10.1063/1.2870111
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000254141600027
关键词[WOS]	STATISTICS ; SIMULATION ; SPECTRA
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/26102
专题	力学所知识产出(1956-2008)
通讯作者	He, GW (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Yao HD,He GW,Wang M,et al. Time Correlations Of Pressure In Isotropic Turbulence[J]. Physics of Fluids,2008:025105(1-4).
APA	姚华栋,何国威,Wang M,张星,&He, GW .(2008).Time Correlations Of Pressure In Isotropic Turbulence.Physics of Fluids,025105(1-4).
MLA	姚华栋,et al."Time Correlations Of Pressure In Isotropic Turbulence".Physics of Fluids (2008):025105(1-4).

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