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Measurement of Temporal and Spatial Evolution of Transitional Pipe Flow with PIV

  • J. Westerweel
  • A. A. Draad
Conference paper

Abstract

Turbulent ‘slugs’ were generated by injection of a small amount of fluid into a fully-developed laminar pipe flow at a Reynolds number of 5,800. Digital particle image velocimetry (PIV) was applied to measure the instantaneous flow field at different downstream locations with respect to the point of injection. At each location the passage of the turbulent slug could be recorded in a sequence of images. The results show the development in space and time of the turbulent slug as it progresses inside the pipe. For one location the consecutive PIV results were compiled into a single data set that represents a (quasi-) instantaneous cross section of the turbulent slug. From this data set it is possible to identify the flow structures that occur in the leading, central and trailing parts of the turbulent slug.

Keywords

Particle Image Velocimetry Pipe Flow Transition Turbulence 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • J. Westerweel
    • 1
  • A. A. Draad
    • 1
  1. 1.Laboratory for Aero and HydrodynamicsDelft University of TechnologyThe Netherlands

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