Proceedings of the Korean Society of Propulsion Engineers Conference (한국추진공학회:학술대회논문집)

  • 2004.03a
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  • Pages.341-346
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  • 2004
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  • 1975-342X(pISSN)
The Korean Society of Propulsion Engineers (한국추진공학회)
권호 표지

Numerical simulation of gas-liquid two phase flow in micro tubes

  • Sunakawa, Hideo (University of Tokyo, Department of Aeronautics and Astronautics) ;
  • Teramoto, Susumu (University of Tokyo, Department of Aeronautics and Astronautic) ;
  • Nagashima, Toshio (University of Tokyo, Department of Aeronautics and Astronautics)
  • Published : 2004.03.01
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Abstract

Motion of a bubble inside narrow tube is numerically studied. The numerical code assumes axi-symmetric incompressible flow field. The surface of the bubble is captured by VOF (Volume Of Fluid) method, and it is advected by MARS (Multiphase Advection and Reconstruction Scheme). Air bubble inside water is first studied, and it was found that a strong vortex, which is induced by the pressure difference caused by the surface tension, is formed at the rear part of the bubble. Then flow parameters are parametrically varied to understand the correlation between the bubble shape, the bubble velocity, and the flow parameters. The parametric study revealed that the aspect ratio of the bubble mainly depends on We number, and the oscillation of the bubble speeds is dependent on Re number.

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