Analysis of spatial and temporal spectra of liquid film surface in annular gas-liquid flow

Sergey Alekseenko, Andrey Cherdantsev, Oksana Heinz, Sergey Kharlamov, Dmitriy Markovich

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Wavy structure of liquid film in annular gas-liquid flow without liquid entrainment consists of fast long-living primary waves and slow short-living secondary waves. In present paper, results of spectral analysis of this wavy structure are presented. Application of high-speed LIF technique allowed us to perform such analysis in both spatial and temporal domains. Power spectra in both domains are characterized by one-humped shape with long exponential tail. Influence of gas velocity, liquid Reynolds number, liquid viscosity and pipe diameter on frequency of the waves is investigated. When gravity effect is much lesser than the shear stress, similarity of power spectra at different gas velocities is observed. Using combination of spectral analysis and identification of characteristic lines of primary waves, frequency of generation of secondary waves by primary waves is measured.

Original languageEnglish
Article number1590
JournalExperiments in Fluids
Issue number9
Publication statusPublished - 1 Sep 2013
Externally publishedYes

ASJC Scopus subject areas

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

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