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Resonance Wave Pumping: Mean Wave Mass Flux

Author(s): Remi Carmigniani, Damien Violeau, Morteza Gharib

Linked Author(s): Damien Violeau

Keywords: Wave-mean flow, PIV, waves/free-surface flows

Abstract: Inspired by the valveless impedance pump of Liebau, a free-surface wave pump was designed and investigated experimentally: resonance wave pump. It consists of a rectangular tank with a centered submerged plate. It separates the tank into a free-surface section above the submerged plate and a rigid recirculation section under it. A paddle generates wave above the submerged plate at an off-centered position. It was reported by the authors (Carmigniani et al. , 2017) that near certain frequencies (natural or resonance frequencies), a unidirectional pulsating flow was generated under the submerged plate. The pumping mechanism can be explained by the Stokes wave mass transport. To further understand the pumping dynamic, experiments with Particle Image Velocimetry (PIV) and Volume of Fluid (VOF) simulations were conducted to investigate the flow above the submerged plate. Good agreement was found between the experiments and the simulations mean mass flux field. The simulations were further used to evaluate the Stokes wave mass transport, which was compared to the second order wave mass transport model proposed in Carmigniani et al. (2017). This study confirms the importance of the wave mass transport in the pumping mechanism of the resonance wave tank


Year: 2017

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