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Experimental investigation and CFD simulation of horizontal stratified two-phase flow phenomena

Vallee, C.; Höhne, T.; Prasser, H.-M.; Sühnel, T.

For the investigation of stratified two-phase flow, two horizontal channels with rectangular cross-section were built at Forschungszentrum Rossendorf. The channels allow the investigation of air/water co-current flows, especially the slug behaviour, at atmospheric pressure and room temperature. The test-sections are made of acrylic glass, so that optical techniques, like high-speed video observation or particle image velocimetry (PIV), can be applied for measurements. The rectangular cross-section was chosen to provide better observation possibilities. Moreover, dynamic pressure measurements were performed and synchronised with the high-speed camera system.

CFD post test simulations of stratified flows were performed using the code ANSYS-CFX. The Euler-Euler two fluid model with the free surface option was applied on grids of minimum 400'000 control volumes. The turbulence was modelled separately for each phase using the k-ω based shear stress transport (SST) turbulence model. The results compare very well in terms of slug formation, velocity, and breaking. The qualitative agreement between calculation and experiment is encouraging and shows that CFD can be a useful tool in studying horizontal two-phase flow.

Keywords: Horizontal two-phase flow; Slug flow; High-speed video observations; Image processing; PIV; CFD

  • Contribution to proceedings
    CFD4NRS - Benchmarking of CFD Codes for Application to Nuclear Reactor Safety, 05.-07.09.2006, Garching, München, Germany
    Paper A6-31
  • Lecture (Conference)
    CFD4NRS - Benchmarking of CFD Codes for Application to Nuclear Reactor Safety, 05.-07.09.2006, Garching, München, Germany
  • Nuclear Engineering and Design 238(2008), 637-646
    DOI: 10.1016/j.nucengdes.2007.02.051

Permalink: https://www.hzdr.de/publications/Publ-8080
Publ.-Id: 8080