Study on drag coefficient of rising bubble in still water

2017 2nd International Seminar on Advances in Materials Science and Engineering

Shi, M.Y.^1 ; Qi, Mei^1 ; Yi, C.G.^1 ; Liu, D.Y.^2 ; Zhang, K.X.^3

Research Institute of Petroleum Exploration and Development, Beijing, China^1

Petrochina Beijing Gas Pipeline Co. LTD, Beijing, China^2

Sinopec Gas Company, China University of Petroleum, Shan Dong Zibo, China^3

关键词: Acceleration phase;    Calculation analysis;    Classical mechanics;    Computing methods;    Experimental demonstrations;    Experimental modeling;    Newton's theory;    Theoretical modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012093/pdf
DOI  :  10.1088/1757-899X/231/1/012093

来源: IOP

【 摘 要 】

Research on the behavior of a rising bubble in still water is on the basis of Newton's theory of classical mechanics. Develop a calculation analysis and an experimental process of bubble rising behavior in order to search for an appropriate way of valuing drag coefficient, which is the key element toward this issue. Analyze the adaptability of the drag coefficient; compare the theoretical model to the real experimental model of rising bubble behavior. The result turns out that the change rate of radius could be ignored according to the analysis; the acceleration phase is transient; final velocity and the diameter of bubble do relate to the drag coefficient, but have no obvious relation with the depth of water. After series of inference analysis of the bubble behavior and experimental demonstration, a new drag coefficient and computing method is proposed.