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Related Experiment Videos

Experimental and theoretical progress in pipe flow transition.

A P Willis1, J Peixinho, R R Kerswell

  • 1School of Mathematics, University of Bristol, Bristol BS8 1TW, UK.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|May 20, 2008
PubMed
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Researchers have advanced understanding of pipe flow turbulence. New findings clarify disturbance thresholds for laminar-to-turbulent transition and turbulence decay, with experimental and numerical agreement.

Area of Science:

  • Fluid dynamics
  • Turbulence research
  • Hydrodynamics

Background:

  • Osborne Reynolds' 1883 experiments laid the foundation for pipe flow turbulence research.
  • The stability of Hagen-Poiseuille flow remains a central problem in fluid dynamics.
  • Despite extensive study, key aspects of pipe flow transition are still under investigation.

Purpose of the Study:

  • To review recent experimental and numerical findings on pipe flow stability.
  • To elucidate the critical disturbance amplitude for turbulence transition.
  • To define the turbulence decay threshold and explore traveling wave solutions.

Main Methods:

  • Experimental investigations of fluid flow in pipes.
  • Numerical simulations of turbulent and laminar flow regimes.

Related Experiment Videos

  • Analysis of disturbance amplitudes and Reynolds numbers.

    • Main Results:

    • Quantitative agreement between experimental and numerical data on turbulence decay thresholds.
    • Identification of threshold amplitudes for triggering turbulence from laminar flow.
    • Insights into the role of unstable traveling wave solutions in pipe flow.

    Conclusions:

    • Significant progress has been made in understanding pipe flow turbulence.
    • Experimental and numerical methods provide consistent results for flow stability.
    • Traveling wave solutions offer new perspectives on transitional and turbulent pipe flow.