Original contribution
Turbulent pipe flow studied by time-averaged NMR imaging: Measurements of velocity profile and turbulent intensity

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Abstract

A time-averaged method to obtain quantitative measurements in turbulent flow by phase flow encoding NMR imaging is introduced. With this method time-averaged velocity profiles and turbulence intensities can be determined. Time-averaged velocity profiles for pipe flow of water driven by a constant pressure gradient at Reynolds numbers from 1200 to 9400 were visualized. A precise correlation between the pixel intensity of the time-averaged NMR flow image and the local turbulence intensity of the flow is derived. The measured turbulence intensities are in agreement with published data obtained using other experimental methods.

References (38)

  • K. Fukuda et al.

    A pulsed NMR study on the flow of fluid

    J. Phys. Soc. Japn.

    (1979)
  • K. Fukuda et al.

    Transition from laminar to turbulent flow of water in a pipe measured by a pulsed NMR method

    J. Phys. Soc. Japn.

    (1985)
  • Y. Kawabe et al.

    A note on the signal intensity of the second spin-echo in Carr-Purcell-Meiboom-Gill sequence of turbulent flows

    J. Phys. Soc. Japn.

    (1983)
  • D.O. Kuethe

    Measuring distributions of eddy diffusivity with magnetic resonance imaging

  • J.H. Gao et al.

    Turbulent flow effects on NMR imaging: Measurement of turbulent intensity

    Med. Phys.

    (1991)
  • J. Laufer

    The structure of turbulence in fully developed pipe flow

    NACA Report

    (1954)
  • R.S. Brodkey
  • T. Wei et al.

    Reynolds-number effects on the structure of a turbulent channel flow

    J. Fluid Mech.

    (1989)
  • P.-A. Chevrin et al.

    The structure of Reynolds stress in the near-wall region of a fully developed turbulent pipe flow

    Exp. Fluids.

    (1992)

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