Simulation Study of the Kármán Vortex Street in Bubble Flow
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.
bubble flowKármán vortex streetStrouhal numbervortex shedding frequency
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