Antiresonant droplets [update]

ProlateWhen a droplet bounces onto a surface of the same liquid, coalescence occurs. This can be avoided by vibrating the liquid bath leading to a periodic bouncing. The bouncing mechanism is complex and depends strongly on the forcing parameters as shown in our previous works [1-3]. Depending on the droplet size, bouncing droplets may behave as a quantum analog, called a walker (see our Quandrop project). In a preprint that we posted on arxiv [4], we show that it is possible to select the size of droplets using droplet resonance. In this case, the droplet deformations, which are extremely sensitive to droplet size, are closely linked to the bouncing mechanism. It is also possible to “kill” one droplet size using antiresonance. The latter phenomenon corresponds to a phase shift of pi/2 between bouncing and droplet deformations. In the movie below, we show an application of our resonance/antiresonance discovery for selecting droplets. [1] S.Dorbolo, D.Terwagne, N.Vandewalle, and T.Gilet, Resonant and rolling droplet, New J. Phys. 10, 113021 (2008) – PDF [2] D.Terwagne, F.Ludewig, N.Vandewalle and S.Dorbolo, The role of the droplet deformations in the bouncing droplet dynamics, Phys. Fluids 25, 122101 (2013) – PDF [3] M.Hubert, F.Ludewig, S.Dorbolo, N.Vandewalle, Bouncing dynamics of a spring, Physica D 272, 1-7 (2014) – PDF [4] M.Hubert, D.Robert, H.Caps, S.Dorbolo, and N.Vandewalle, Resonant and antiresonant bouncing droplets, Phys. Rev. E 91, 023017 (2015) – arXiv 1402.2416


About nicovdw

Professor in Physics
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1 Response to Antiresonant droplets [update]

  1. nicovdw says:

    Reblogged this on GRASP | Soft Matter | University of Liège and commented:

    update : paper published

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