Experimental investigation of the structure of large- and very-large-scale motions in turbulent pipe flow

Sean C.C. Bailey; Alexander J. Smits

doi:10.1017/S0022112009993983

Experimental investigation of the structure of large- and very-large-scale motions in turbulent pipe flow

Sean C.C. Bailey, Alexander J. Smits

Mechanical & Aerospace Engineering

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76 Scopus citations

Abstract

Multi-point velocity measurements have been performed in turbulent pipe flow at Re_D = 1.5×10⁵ and combined with cross-spectral and proper orthogonal decomposition analysis to elucidate information on the structure of the large- and very-large-scale motions in the outer layer of wall-bounded flows. The results indicate that in the outer layer the large-scale motions (LSM) may be composed of detached eddies with a wide range of azimuthal scales, whereas in the logarithmic layer they are attached. The very-large-scale motions (VLSM) have large radial scales, are concentrated around a single azimuthal mode and make a smaller angle with the wall compared to the LSM. The results support a hypothesis that only the detached LSM in the outer layer align to form the VLSM.

Original language	English (US)
Pages (from-to)	339-356
Number of pages	18
Journal	Journal of Fluid Mechanics
Volume	651
DOIs	https://doi.org/10.1017/S0022112009993983
State	Published - May 25 2010

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Applied Mathematics

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10.1017/S0022112009993983

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title = "Experimental investigation of the structure of large- and very-large-scale motions in turbulent pipe flow",

abstract = "Multi-point velocity measurements have been performed in turbulent pipe flow at ReD = 1.5×105 and combined with cross-spectral and proper orthogonal decomposition analysis to elucidate information on the structure of the large- and very-large-scale motions in the outer layer of wall-bounded flows. The results indicate that in the outer layer the large-scale motions (LSM) may be composed of detached eddies with a wide range of azimuthal scales, whereas in the logarithmic layer they are attached. The very-large-scale motions (VLSM) have large radial scales, are concentrated around a single azimuthal mode and make a smaller angle with the wall compared to the LSM. The results support a hypothesis that only the detached LSM in the outer layer align to form the VLSM.",

author = "Bailey, {Sean C.C.} and Smits, {Alexander J.}",

note = "Funding Information: The support of the Office of Naval Research under grants N00014-07-1-0111 and N00014-09-1-0263 (programme manager Ron Joslin) is gratefully acknowledged.",

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doi = "10.1017/S0022112009993983",

language = "English (US)",

volume = "651",

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publisher = "Cambridge University Press",

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TY - JOUR

T1 - Experimental investigation of the structure of large- and very-large-scale motions in turbulent pipe flow

AU - Bailey, Sean C.C.

AU - Smits, Alexander J.

N1 - Funding Information: The support of the Office of Naval Research under grants N00014-07-1-0111 and N00014-09-1-0263 (programme manager Ron Joslin) is gratefully acknowledged.

PY - 2010/5/25

Y1 - 2010/5/25

N2 - Multi-point velocity measurements have been performed in turbulent pipe flow at ReD = 1.5×105 and combined with cross-spectral and proper orthogonal decomposition analysis to elucidate information on the structure of the large- and very-large-scale motions in the outer layer of wall-bounded flows. The results indicate that in the outer layer the large-scale motions (LSM) may be composed of detached eddies with a wide range of azimuthal scales, whereas in the logarithmic layer they are attached. The very-large-scale motions (VLSM) have large radial scales, are concentrated around a single azimuthal mode and make a smaller angle with the wall compared to the LSM. The results support a hypothesis that only the detached LSM in the outer layer align to form the VLSM.

AB - Multi-point velocity measurements have been performed in turbulent pipe flow at ReD = 1.5×105 and combined with cross-spectral and proper orthogonal decomposition analysis to elucidate information on the structure of the large- and very-large-scale motions in the outer layer of wall-bounded flows. The results indicate that in the outer layer the large-scale motions (LSM) may be composed of detached eddies with a wide range of azimuthal scales, whereas in the logarithmic layer they are attached. The very-large-scale motions (VLSM) have large radial scales, are concentrated around a single azimuthal mode and make a smaller angle with the wall compared to the LSM. The results support a hypothesis that only the detached LSM in the outer layer align to form the VLSM.

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JO - Journal of Fluid Mechanics

JF - Journal of Fluid Mechanics

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Experimental investigation of the structure of large- and very-large-scale motions in turbulent pipe flow

Abstract

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