The phenomenon of Kármán vortex street in bubble flow was studied using the laminar flow model in COMSOL software.Within the range of low to moderate Reynolds numbers,the Strouhal number of bubble flow was obtained using three methods.Compared to pure water,bubble flow has a larger Strouhal number(St ≈ 0.24).Within the studied parameter range(obstacle size 2～5 cm,inflow velocity 0.02～0.07 m/s),the vortex shedding frequency is directly proportional to the inflow velocity,inversely proportional to the obstacle diameter,and the wavelength is directly proportional to the obstacle diameter.
关键词
气泡流/卡门涡街/斯特劳哈尔数/涡脱频率
Key words
bubble flow/Kármán vortex street/Strouhal number/vortex shedding frequency
维普
万方数据