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Experiments in Fluids

, 51:821 | Cite as

Dynamic film thickness between bubbles and wall in a narrow channel

  • Daisuke Ito
  • Manuel Damsohn
  • Horst-Michael Prasser
  • Masanori Aritomi
Research Article

Abstract

The present paper describes a novel technique to characterize the behavior of the liquid film between gas bubbles and the wall in a narrow channel. The method is based on the electrical conductance. Two liquid film sensors are installed on both opposite walls in a narrow rectangular channel. The liquid film thickness underneath the gas bubbles is recorded by the first sensor, while the void fraction information is obtained by measuring the conductance between the pair of opposite sensors. Both measurements are taken on a large two-dimensional domain and with a high speed. This makes it possible to obtain the two-dimensional distribution of the dynamic liquid film between the bubbles and the wall. In this study, this method was applied to an air–water flow ranging from bubbly to churn regimes in the narrow channel with a gap width of 1.5 mm.

Keywords

Liquid Film Void Fraction Slug Flow Bubbly Flow Film Sensor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Daisuke Ito
    • 1
    • 2
  • Manuel Damsohn
    • 1
  • Horst-Michael Prasser
    • 1
  • Masanori Aritomi
    • 2
  1. 1.Department of Mechanical and Process EngineeringETH ZürichZurichSwitzerland
  2. 2.Research Laboratory for Nuclear ReactorsTokyo Institute of TechnologyMeguro-kuJapan

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