Experiments in Fluids

, Volume 13, Issue 2–3, pp 190–198 | Cite as

Measurements of local velocities inside thin liquid films in horizontal two-phase flow

  • S. V. Paras
  • A. J. Karabelas


A new experimental facility based on Laser Doppler anemometry permits accurate local measurements in a horizontal pipe. Measurements of the axial velocity component in the liquid layer of the atomization/stratified flow regime are reported. The new information includes time-averaged local velocities, RMS values, probability density distributions, and power spectra. Elimination of velocity bias and calculation of velocity spectra is accomplished by a recently developed “signal reconstruction” algorithm. The data suggest that only in the vicinity of the solid surface (sublayer) does the liquid motion resemble the well-known behavior of single phase flow. Beyond that, the flow field is strongly influenced by the wavy gas/liquid interface and by the apparently intensive energy transfer from the very fast moving gas to the liquid layer.


Flow Regime Liquid Film Axial Velocity Liquid Layer Phase Flow 
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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • S. V. Paras
    • 1
  • A. J. Karabelas
    • 1
  1. 1.Department of Chemical EngineeringChemical Process Engineering Research Institute UniversityThessalonikiGreece

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