IMECH-IR  > 力学所知识产出(1956-2008)
Some characteristics of low-speed streaks under sheared air-water interfaces
Wang SF(王双峰); Jia F(贾复); Wang, SF (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
Source PublicationActa Mechanica Sinica
2001
Volume17Issue:2Pages:115-124
ISSN0567-7718
AbstractThe characteristics of low-speed fluid streaks occurring under sheared air-water interfaces were examined by means of hydrogen bubble visualization technique. A critical shear condition under which the streaky structure first appears was determined to be u(tau) approximate to 0.19 cm/s. The mean spanwise streak spacing increases with distance from the water surface owing to merging and bursting processes, and a linear relationship describing variation of non-dimensional spacing <(+)over bar> versus y(+) was found essentially independent of shear stress on the interface. Values of <(+)over bar>, however, are remarkably smaller than their counterparts in the near-wall region of turbulent boundary layers. Though low-speed streaks occur randomly in time and space, the streak spacing exhibits a lognormal probability distribution behavior. A tentative explanation concerning the formation of streaky structure is suggested, and the fact that <(+)over bar> takes rather smaller values than that in wall turbulence is briefly discussed.
Subject Area力学
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000168986700002
WOS KeywordTURBULENT BOUNDARY-LAYER ; CHANNEL FLOW ; FREE-SURFACE
WOS Research AreaEngineering ; Mechanics
WOS SubjectEngineering, Mechanical ; Mechanics
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/16143
Collection力学所知识产出(1956-2008)
Corresponding AuthorWang, SF (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Wang SF,Jia F,Wang, SF . Some characteristics of low-speed streaks under sheared air-water interfaces[J]. Acta Mechanica Sinica,2001,17,2,:115-124.
APA 王双峰,贾复,&Wang, SF .(2001).Some characteristics of low-speed streaks under sheared air-water interfaces.Acta Mechanica Sinica,17(2),115-124.
MLA 王双峰,et al."Some characteristics of low-speed streaks under sheared air-water interfaces".Acta Mechanica Sinica 17.2(2001):115-124.
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