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Experiments in Fluids

, Volume 31, Issue 5, pp 542–549 | Cite as

Wave structure in the radial film flow with a circular hydraulic jump

  • A. Rao
  • J. H. Arakeri

Abstract

 A circular hydraulic jump is commonly seen when a circular liquid jet impinges on a horizontal plate. Measurements of the film thickness, jump radius and the wave structure for various jet Reynolds numbers are reported. Film thickness measurements are made using an electrical contact method for regions both upstream and downstream of the jump over circular plates without a barrier at the edge. The jump radius and the separation bubble length are measured for various flow rates, plate edge conditions, and radii. Flow visualization using high-speed photography is used to study wave structure and transition. Waves on the jet amplify in the film region upstream of the jump. At high flow rates, the waves amplify enough to cause three-dimensional breakdown and what seems like transition to turbulence. This surface wave induced transition is different from the traditional route and can be exploited to enhance heat and mass transfer rates.

Keywords

Surface Wave Circular Plate Mass Transfer Rate Wave Structure Separation Bubble 
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 Berlin Heidelberg 2001

Authors and Affiliations

  • A. Rao
    • 1
  • J. H. Arakeri
    • 1
  1. 1.Department of Mechanical Engineering Indian Institute of Science, Bangalore, India e-mail: jaywant@mecheng.iisc.ernet.inIN

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