한국가시화정보학회지 (Journal of the Korean Society of Visualization)

  • 제6권2호
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  • Pages.14-19
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  • 2008
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  • 1598-8430(pISSN)
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  • 2093-808X(eISSN)
한국가시화정보학회 (The Korean Society of Visualization)
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Time-resolved PIV와 POD기법을 이용한 유량에 따른 단일노즐 버블링 유동 특성에 관한 연구

Characteristics of Bubble-driven Flow with Varying Flow Rates by Using Time-resolved PIV and POD Technique

  • 발행 : 2008.12.31
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초록

In this paper, the recirculation flow motion and mixing characteristics driven by air bubble flow in a rectangular water tank is studied. The Time-resolved PIV technique is adopted for the quantitative visualization and analysis. 532 nm Diode CW laser is used for illumination and orange fluorescent particle images are acquired by a PCO 10bit high-speed camera. To obtain clean particle images, 545 nm long pass optical filter and an image intensifier are employed and the flow rates of compressed air is changed from 2 l/min to 4 l/min at 0.5 MPa. The recirculation and mixing flow field is further investigated by the POD analysis technique. It is observed that the large scale counterclockwise rotation and main vortex is generated in the upper half depth from the free surface and one quarter width from the sidewall. When the flow rates are increased, the main vortex core is moved to the side and bottom wall direction.

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참고문헌

  1. Snabre, P., and Magnifotcham, F., 1998, "Formation and Rise of a Bubble Stream in a Viscous Liquid", Eur. Phys. J. B., Vol. 4, pp. 369-377. https://doi.org/10.1007/s100510050392
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피인용 문헌

  1. Dynamic Analysis of Bubble-Driven Liquid Flows in a Rectangular Tank vol.8, pp.1, 2010, https://doi.org/10.5407/JKSV.2010.8.1.031