CFD-PBM coupled simulation of a nanobubble generator with honeycomb structure

2018 International Conference on Material Strength and Applied Mechanics

材料科学;力学

Ren, F.^1 ; Noda, N.A.^1 ; Ueda, T.^1 ; Sano, Y.^1 ; Takase, Y.^1 ; Umekage, T.^1 ; Yonezawa, Y.^2 ; Tanaka, H.^1

Mechanical Engineering Department, Kyushu Institute of Technology, 1-1 Sensui-cho, Tobata-ku, Kitakyushu-shi

804-8550, Japan^1

Mrufukusuisan Corp., Ltd., 94-22 Nishiminato-machi, Kokurakita-ku, Kitakyushu-shi

803-0801, Japan^2

关键词: Bubble coalescence;    Bubble size distributions;    Coupled simulation;    Phase interactions;    Population balance modeling;    Science and Technology;    Simulation prediction;    Water circulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/372/1/012012/pdf
DOI  :  10.1088/1757-899X/372/1/012012

来源: IOP

【 摘 要 】

In recent years, nanobubble technologies have drawn great attention due to their wide applications in many fields of science and technology. The nitrogen nanobubble water circulation can be used to slow the progressions of oxidation and spoilage for the seafood long- term storage. From previous studies, a kind of honeycomb structure for high-efficiency nanobubble generation has been proposed. In this paper, the bubbly flow in the honeycomb structure was studied. The numerical simulations of honeycomb structure were performed by using a computational fluid dynamics-population balance model (CFD-PBM) coupled model. The numerical model was based on the Eulerian multiphase model and the population balance model (PBM) was used to calculate the gas bubble size distribution. The bubble coalescence and breakage were included. Considering the effect of bubble diameter on the fluid flow, the phase interactions were coupled with the PBM. The bubble size distributions in the honeycomb structure under different work conditions were predicted. The experimental results were compared with the simulation predictions.