Geometrical Optimization of a Venturi-Type Microbubble Generator Using CFD Simulation and Experimental Measurements

Designs

PooBalan Ganesan¹  DillonAlexander Wilson²  Kul Pun²  Faik Hamad² 

[1] Department of Mechanical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;School of Computing, Engineering & Digital Technologies, Teesside University, Middlesbrough, Tees Valley TS1 3BX, UK;

关键词: CFD simulation;    venture-type microbubble generator;    geometrical optimization;    bubble breakup;   

DOI  :  10.3390/designs5010004

来源: DOAJ

【 摘 要 】

Microbubble generators are of considerable importance to a range of scientific fields from use in aquaculture and engineering to medical applications. This is due to the fact the amount of sea life in the water is proportional to the amount of oxygen in it. In this paper, experimental measurements and computational Fluid Dynamics (CFD) simulation are performed for three water flow rates and three with three different air flow rates. The experimental data presented in the paper are used to validate the CFD model. Then, the CFD model is used to study the effect of diverging angle and throat length/throat diameter ratio on the size of the microbubble produced by the Venturi-type microbubble generator. The experimental results showed that increasing water flow rate and reducing the air flow rate produces smaller microbubbles. The prediction from the CFD results indicated that throat length/throat diameter ratio and diffuser divergent angle have a small effect on bubble diameter distribution and average bubble diameter for the range of the throat water velocities used in this study.

【 授权许可】

Unknown