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A simple parameterization for the rising velocity of bubbles in a liquid pool

This article suggests a simple parameterization for the gas bubble rising velocity as a function of the volume-equivalent bubble diameter; this parameterization does not require prior knowledge of bubble shape. This is more convenient than previously suggested parameterizations because it is given as a single explicit formula. | A simple parameterization for the rising velocity of bubbles in a liquid pool N u c l e a r E n g i n e e r i n g a n d T e c h n o l o g y 4 9 ( 2 0 1 7 ) 6 9 2 e6 9 9 Available online at ScienceDirect Nuclear Engineering and Technology journal homepage: www.elsevier.com/locate/net Original Article A Simple Parameterization for the Rising Velocity of Bubbles in a Liquid Pool Sung Hoon Park a,*, Changhwan Park b, JinYong Lee b, and Byungchul Lee b a Department of Environmental Engineering, Sunchon National University, 255 Jungang-ro, Suncheon, Jeonnam 57922, South Korea b FNC Technology, Co., Ltd., 32F Heungdeok IT Valley, 13 Heungdeok 1-ro, Yongin, Gyeonggi 16954, South Korea article info abstract Article history: The determination of the shape and rising velocity of gas bubbles in a liquid pool is of great Received 28 July 2016 importance in analyzing the radioactive aerosol emissions from nuclear power plant ac- Received in revised form cidents in terms of the fission product release rate and the pool scrubbing efficiency of 11 November 2016 radioactive aerosols. This article suggests a simple parameterization for the gas bubble Accepted 13 December 2016 rising velocity as a function of the volume-equivalent bubble diameter; this parameteri- Available online 3 January 2017 zation does not require prior knowledge of bubble shape. This is more convenient than previously suggested parameterizations because it is given as a single explicit formula. It is Keywords: also shown that a bubble shape diagram, which is very similar to the Grace's diagram, can Bubble Rising Velocity be easily generated using the parameterization suggested in this article. Furthermore, the Bubble Shape boundaries among the three bubble shape regimes in the Eo eRe plane and the condition for EoeRe Plane the bypass of the spheroidal regime can be delineated directly from the parameterization Pool Scrubbing formula. Therefore, the .