An experimental study was performed to measure the fluctuation phenomena of a free surface in a vessel with or without an internal structure. A flow enters from the bottom and flows out of the side wall nozzles. Characteristics of the free surface fluctuation are investigated in terms of the geometry factors of the vessel and the flow rate. A modified Froude number is proposed to describe the amplitude of a free surface fluctuation. The fluctuation amplitude increases stably with an increase in the ratio of the vessel diameter to the water level in a vessel without an internal structure. When the ratio is greater than about 2, the fluctuation decreases suddenly with an increase in the ratio and it becomes unstable. The fluctuation amplitude is linearly proportional to the square of the Froude number. The amplitude of a free surface fluctuation increases with an increase in the height of an internal structure, but this increasing ratio is reduced when the height becomes higher. Two correlations were developed in terms of the Froude number and geometry factors to predict the amplitude of the free surface fluctuation in a vessel with or without an internal structure.
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December 2008
Research Papers
Experimental Study on the Amplitude of a Free Surface Fluctuation
Ho-Yun Nam,
Ho-Yun Nam
Fluid Engineering Division,
e-mail: hynam@kaeri.re.kr
Korea Atomic Energy Research Institute
, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, Korea
Search for other works by this author on:
Byoung-Hae Choi,
Byoung-Hae Choi
Fluid Engineering Division,
Korea Atomic Energy Research Institute
, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, Korea
Search for other works by this author on:
Jong-Man Kim,
Jong-Man Kim
Fluid Engineering Division,
Korea Atomic Energy Research Institute
, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, Korea
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Byung-Ho Kim
Byung-Ho Kim
Fluid Engineering Division,
Korea Atomic Energy Research Institute
, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, Korea
Search for other works by this author on:
Ho-Yun Nam
Fluid Engineering Division,
Korea Atomic Energy Research Institute
, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, Koreae-mail: hynam@kaeri.re.kr
Byoung-Hae Choi
Fluid Engineering Division,
Korea Atomic Energy Research Institute
, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, Korea
Jong-Man Kim
Fluid Engineering Division,
Korea Atomic Energy Research Institute
, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, Korea
Byung-Ho Kim
Fluid Engineering Division,
Korea Atomic Energy Research Institute
, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353, KoreaJ. Fluids Eng. Dec 2008, 130(12): 121106 (11 pages)
Published Online: October 28, 2008
Article history
Received:
January 31, 2007
Revised:
July 10, 2008
Published:
October 28, 2008
Citation
Nam, H., Choi, B., Kim, J., and Kim, B. (October 28, 2008). "Experimental Study on the Amplitude of a Free Surface Fluctuation." ASME. J. Fluids Eng. December 2008; 130(12): 121106. https://doi.org/10.1115/1.3001071
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