Mixing mechanisms in turbulent pipe flow

An experimental investigation of passive scalar mixing in turbulent pipe flow is carried out using a new non-intrusive scalar initialization technique. The measurements support a recently predicted similarity scaling of concentration spectra in flows that are unbounded in one direction. Reflecting t...

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Bibliographic Details
Published in:Physics of fluids (1994) 1997-03, Vol.9 (3), p.717-723
Main Authors: Guilkey, J. E., Kerstein, A. R., McMurtry, P. A., Klewicki, J. C.
Format: Article
Language:English
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Summary:An experimental investigation of passive scalar mixing in turbulent pipe flow is carried out using a new non-intrusive scalar initialization technique. The measurements support a recently predicted similarity scaling of concentration spectra in flows that are unbounded in one direction. Reflecting this scaling, the scalar variance exhibits a power-law rather than exponential decay, indicating that the traditional plug-flow reactor picture of turbulent pipe-flow mixing omits key physical mechanisms.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.869211