Application of PIV to velocity measurements in a liquid film flowing down an inclined cylinder

S. V. Alekseenko, V. A. Antipin, A. V. Bobylev, D. M. Markovich

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Abstract

PIV technique is applied for measurements of instant velocity distributions in a liquid film flowing down an inclined tube in the form of a wavy rivulet. An application of special optical calibration is applied to correct distortion effects caused by the curvature of the interface. A vortex flow of liquid is observed inside a wave hump in the reference system moving with wave phase velocity. Conditionally averaged profiles of longitudinal and transverse components of liquid velocity are obtained for different cross-sections of developed non-linear waves. It is shown that the increase in wave amplitude slightly changes the location of the vortex center. The analysis of modification of vortex motion character due to wavy flow conditions, such as tube inclination angle, film Reynolds number, wave excitation frequency, is fulfilled.

Original languageEnglish
Pages (from-to)197-207
Number of pages11
JournalExperiments in Fluids
Volume43
Issue number2-3
DOIs
Publication statusPublished - 1 Aug 2007
Externally publishedYes

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ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

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