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The spacing of streaks in unsteady turbulent wall‐bounded flow

dc.contributor.authorBrereton, Giles Johnen_US
dc.contributor.authorHwang, J. ‐L.en_US
dc.date.accessioned2010-05-06T21:58:44Z
dc.date.available2010-05-06T21:58:44Z
dc.date.issued1994-07en_US
dc.identifier.citationBrereton, G. J.; Hwang, J.‐L. (1994). "The spacing of streaks in unsteady turbulent wall‐bounded flow." Physics of Fluids 6(7): 2446-2454. <http://hdl.handle.net/2027.42/70321>en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/70321
dc.description.abstractThe spacing of streaks of low‐speed fluid has been studied experimentally in a wall‐bounded turbulent flow in which sinusoidal unsteadiness was superposed on an otherwise steady mainstream over a range of frequencies. The modulation of phase‐conditioned streak spacing about its mean value does not follow the steady wall‐flow relation of λuτ/ν equal to a constant. Instead, it is quite accurately described by a local length scale that models the momentary value of the total shear distortion of large eddies of the flow. This single shear‐distortion length scale also correlates well with the streak spacing measured in steady wall‐bounded flows and in unbounded homogeneous turbulent flow at high shear rates. The apparent generality of these results implies that the streak‐spacing selection mechanism depends strongly on the strain history of large‐scale coherent motions and so should be investigated in the context of the coupled straining processes of turbulence production.en_US
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dc.format.extent1295669 bytes
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dc.publisherThe American Institute of Physicsen_US
dc.rights© The American Institute of Physicsen_US
dc.titleThe spacing of streaks in unsteady turbulent wall‐bounded flowen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelPhysicsen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Mechanical Engineering and Applied Mechanics, The University of Michigan, Ann Arbor, Michigan 48109en_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/70321/2/PHFLE6-6-7-2446-1.pdf
dc.identifier.doi10.1063/1.868192en_US
dc.identifier.sourcePhysics of Fluidsen_US
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dc.owningcollnamePhysics, Department of


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