Extraction of plumes in turbulent thermal convection

doi:10.1103/PhysRevLett.93.124501

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	Extraction of plumes in turbulent thermal convection
	Ching, ESC ; Guo, H ; Shang, XD ; Tong, P ; Xia, KQ
刊名	物理评论快报
	2004
关键词	STATISTICS
DOI	10.1103/PhysRevLett.93.124501
英文摘要	We present a scheme to extract the velocity of buoyant structures in turbulent thermal convection from simultaneous local velocity and temperature measurements. Applying this scheme to measurements taken at positions within the convection cell where the buoyant structures are dominated by plumes, we obtain the temperature dependence of the plume velocity and understand our results using the equations of motion. We further obtain the scaling behavior of the average local heat flux in the vertical direction at the cell center with the Rayleigh number and find that the scaling exponent is different from that measured for the Nusselt number. This difference leads to the conclusion that heat cannot be mainly transported through the central region of the convection cell.; Physics, Multidisciplinary; SCI(E); EI; 0; ARTICLE; 12; 124501-1-124501-4; 93
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/399635]
专题	工学院
推荐引用方式 GB/T 7714	Ching, ESC,Guo, H,Shang, XD,et al. Extraction of plumes in turbulent thermal convection[J]. 物理评论快报,2004.
APA	Ching, ESC,Guo, H,Shang, XD,Tong, P,&Xia, KQ.(2004).Extraction of plumes in turbulent thermal convection.物理评论快报.
MLA	Ching, ESC,et al."Extraction of plumes in turbulent thermal convection".物理评论快报 (2004).