On the flow around a vibrating cantilever pair with different phase angles
- On the flow around a vibrating cantilever pair with different phase angles
- 최민석; 이상엽; 김용환
- Vibrating cantilever; Counter-rotating vortex; Piezoelectric fan; Unsteady simulation
- Issue Date
- European journal of mechanics. B, Fluids
- VOL 34, 146-157
- The unsteady flow fields generated by cantilevers were simulated using a commercial flow solver. The
motion of cantilevers was described realistically with a user-define-function in the flow solver, and it
was matched well with the experimentally measured one. For validation, the flow induced by a single
vibrating cantilever was compared with the experimental data qualitatively, and the numerical results
clearly showed that the numerical method can generate realistic flow phenomena. In the pair-wise
configuration, the effect of phase angle difference between two cantilevers was analyzed by using the
unsteady flow and the time-averaged velocity field. The flow was significantly affected by the phase angle
difference, thus it was symmetric to the center in some cases but asymmetric in others. It was found that
the interaction of counter-rotating vortices generated by each cantilever changes significantly with the
phase angle difference, and this phase difference is the main factor that determines overall flow features.
From the viewpoint of cooling effectiveness, the cantilever pair vibrating in counter-phase is a much more
effective way to generate the airflow than the other tested cases.
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