Waves and Secondary Flows in Stratified Gas/Liquid Duct Flow

  • Magnus Nordsveen
  • Arnold F. Bertelsen
Part of the Fluid Mechanics and Its Applications book series (FMIA, volume 34)


When a gas and a liquid flow co-currently through a horizontal duct, stratified flow occur at fairly low flow rates with the heavier liquid flowing along the bottom of the duct and gas above the liquid. The stratified flow regime has been studied by several researchers. Hanratty and Engen (1957), Akai, Inoue and Aoki (1977) and Suzanne (1985) all reported similar flow condition for transitions to the stratified regime in horizontal and near horizontal duct flow. The stratified regime is usually divided into two main sub-regimes: The stratified smooth and the stratified wavy regime. The flow is turbulent in the stratified wavy regime, and the interface between the gas and the liquid is characterized by complicated wave patterns. This regime has been divided into several new sub-regimes according to the wave structure, which for some flow rates may be fairly regular. There is a considerable amount of experimental data on the interfacial wave structure in the stratified wavy flow regime, but very few researchers have studied both the wave field and the three dimensional flow field in the same experiment. Suzanne (1985) is one of these few. He reported that for certain gas and liquid flow rates a fairly regular wave pattern occurred accompanied by strong transverse mean flow. His experiment was conducted in a duct with rectangular cross section


Wave Field Couette Flow Turbulent Shear Flow Duct Flow Axial Velocity Component 
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  1. Akai, M., Inoue, A., and Aoki, S. (1977) Structure of Co-current Stratified Two-phase Flow with Wavy InterfaceTheor. Appl. Mech 25, pp 445 – 455Google Scholar
  2. Andrews, D.G., and Mcintyre, M.E. (1978) An Exact Theory of Nonlinear Waves on a Lagrangian Mean FlowJ. Fluid Mech 89, pp 609 – 646MathSciNetzbMATHCrossRefGoogle Scholar
  3. Benkirane, R., Line, A., Masbernat, L. (1990) Modelling of wavy stratified flow in a rectangular channelICHMT International Seminar on Phase-Interface Phenomena in Multiphase Flow, Dubrovnik, May 14 – 18 1990Google Scholar
  4. Craik, A. D. D. and Leibovich, S (1976) "A rational model for Langmuir circulations"J. Fluid Mech 73,401 – 426Google Scholar
  5. Craik, A.D.D. (1977) The Generation of Langmuir Circulation by an Instability MechanismJ. Fluid Mech 81, pp 209 – 223zbMATHCrossRefGoogle Scholar
  6. Hanratty, T.J. and Engen, J.M. (1957) Interaction between a Turbulent Air Stream and a Moving Water SurfaceA.I.Ch.E. Journal 3, pp 299 – 304Google Scholar
  7. Hussain, A. K. M. F., and Reynolds, W. C. (1970) The Mechanics of an Organized Wave in a Turbulent Shear FlowJ. Fluid Mech 41, pp 241 – 258CrossRefGoogle Scholar
  8. Leibovich, S. (1977) Convective Instability of Stably Stratified Water in the OceanJ. Fluid Mech 82, pp 561 – 581MathSciNetCrossRefGoogle Scholar
  9. Nordsveen, M. and Betelsen, A.F. (1993) Waves, turbulence and the mean field in stratified duct flowResearch Report in Mechanics 93–4, Mechanics Division, Department of Mathematics, University of Oslo, NorwayGoogle Scholar
  10. Nordsveen, M. and Betelsen, A.F. (1996) Wave induced secondary motions in stratified duct flows (to appear in Int. J. Multiphase Flow ).Google Scholar
  11. Strand, Ø. (1993) An experimental investigation of stratified two-phase flow in horizontal pipesPh. D. Thesis, University of Oslo, NorwayGoogle Scholar
  12. Suzanne, C. (1985) Structure de l’ecoulement stratifie de gaz et de liquide en canal rect-angulaireThèse de Docteur es Science, Institut National Polytechnique de Toulouse, FranceGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • Magnus Nordsveen
    • 1
  • Arnold F. Bertelsen
    • 2
  1. 1.Institute for Energy TechnologyKjellerNorway
  2. 2.Mechanics Division, Department of MathematicsUniversity of OsloNorway

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