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Multiphase Science and Technology
SJR: 0.153 SNIP: 0.222 CiteScore™: 0.26

ISSN 印刷: 0276-1459
ISSN オンライン: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v18.i1.30
pages 55-72

TURBULENT SWIRLING WATER FLOW WITH OIL DROPLETS

Takuro Kouda
Graduate student, Division of Mechanical and System Eng., Kyoto Institute of Technology, Kyoto, Japan
Yoshimichi Hagiwara
Department of Mechanical and System Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan

要約

We have carried out measurements of the flow field of swirling water flow with immiscible oil droplets in a horizontal pipe. The swirl is obtained with a stationary vane inside the pipe. The flow is visualized with tracer particles and the images of visualized flow are captured from the side and downstream-end of the pipe with a progressive-scan video camera. The velocity field is measured from the captured images with the velocity gradient tensor method. The experimental results show that the low-density droplets have relative motion to the water flow. The axial mean velocity decreases because the droplets injected into the flow have had lower velocity than the local flow velocity. The periodic pulsative wake flow of some droplets causes the increase in the turbulence intensity.


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