A Simple Parameterization for the Rising Velocity of Bubbles in a Liquid Pool

Nuclear Engineering and Technology

Sung Hoon Park¹  Changhwan Park²  JinYong Lee²  Byungchul Lee² 

[1] Department of Environmental Engineering, Sunchon National University, 255 Jungang-ro, Suncheon, Jeonnam 57922, South Korea;FNC Technology, Co., Ltd., 32F Heungdeok IT Valley, 13 Heungdeok 1-ro, Yongin, Gyeonggi 16954, South Korea;

关键词: Bubble Rising Velocity;    Bubble Shape;    Eo–Re Plane;    Pool Scrubbing;    Radioactive Aerosol Emissions;   

DOI  :  10.1016/j.net.2016.12.006

来源: DOAJ

【 摘 要 】

The determination of the shape and rising velocity of gas bubbles in a liquid pool is of great importance in analyzing the radioactive aerosol emissions from nuclear power plant accidents in terms of the fission product release rate and the pool scrubbing efficiency of radioactive aerosols. 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. It is also shown that a bubble shape diagram, which is very similar to the Grace's diagram, can be easily generated using the parameterization suggested in this article. Furthermore, the boundaries among the three bubble shape regimes in the Eo–Re plane and the condition for the bypass of the spheroidal regime can be delineated directly from the parameterization formula. Therefore, the parameterization suggested in this article appears to be useful not only in easily determining the bubble rising velocity (e.g., in postulated severe accident analysis codes) but also in understanding the trend of bubble shape change due to bubble growth.

【 授权许可】

Unknown