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Influence of a local change of depth on the behavior of walking oil drops

Influence of a local change of depth on the behavior of walking oil drops
Influence of a local change of depth on the behavior of walking oil drops
Bouncing liquid silicone oil drops on a vertically oscillating bath of the same liquid were studied experimentally. The different bouncing regimes previously described in the literature were observed, with transitions depending mainly on the droplet size and the forcing acceleration of the oil bath. In a particular range of forcing amplitudes, just below the Faraday instability threshold where standing waves appear on the free surface, walking drops traveling at a constant velocity over the surface were observed, consistent with previous studies. The influence of a local change of depth on this walking behavior was studied by submerging an obstacle in the oil bath. Notably different to the study of Eddi et al. (2009) [1], the depth change was such that walking was still observed over the obstacle. Previously unobserved drop trajectories, including trapping of a walking drop over the obstacle, crossing for non-normal drop approach to the obstacle, and reflection from the rear face of the obstacle were observed and explained in light of recent results and models in the literature.
Bouncing drops, Particle-wave interaction, Walking drops, Change of depth, Pilot wave theory
0894-1777
237-246
Carmigniani, R.
274a3aae-7035-4886-a85d-c3ba0b80d109
Lapointe, S.
e11e99ce-00b4-42b3-8885-5bf474ce2dc4
Symon, S.
2e1580c3-ba27-46e8-9736-531099f3d850
McKeon, B. J.
4f338f42-224d-41f4-b3ac-c4ca1afc582f
Carmigniani, R.
274a3aae-7035-4886-a85d-c3ba0b80d109
Lapointe, S.
e11e99ce-00b4-42b3-8885-5bf474ce2dc4
Symon, S.
2e1580c3-ba27-46e8-9736-531099f3d850
McKeon, B. J.
4f338f42-224d-41f4-b3ac-c4ca1afc582f

Carmigniani, R., Lapointe, S., Symon, S. and McKeon, B. J. (2014) Influence of a local change of depth on the behavior of walking oil drops. Experimental Thermal and Fluid Science, 54, 237-246. (doi:10.1016/j.expthermflusci.2013.12.023).

Record type: Article

Abstract

Bouncing liquid silicone oil drops on a vertically oscillating bath of the same liquid were studied experimentally. The different bouncing regimes previously described in the literature were observed, with transitions depending mainly on the droplet size and the forcing acceleration of the oil bath. In a particular range of forcing amplitudes, just below the Faraday instability threshold where standing waves appear on the free surface, walking drops traveling at a constant velocity over the surface were observed, consistent with previous studies. The influence of a local change of depth on this walking behavior was studied by submerging an obstacle in the oil bath. Notably different to the study of Eddi et al. (2009) [1], the depth change was such that walking was still observed over the obstacle. Previously unobserved drop trajectories, including trapping of a walking drop over the obstacle, crossing for non-normal drop approach to the obstacle, and reflection from the rear face of the obstacle were observed and explained in light of recent results and models in the literature.

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More information

Accepted/In Press date: 26 December 2013
e-pub ahead of print date: 11 January 2014
Published date: April 2014
Keywords: Bouncing drops, Particle-wave interaction, Walking drops, Change of depth, Pilot wave theory

Identifiers

Local EPrints ID: 444719
URI: http://eprints.soton.ac.uk/id/eprint/444719
ISSN: 0894-1777
PURE UUID: c410a6a0-8923-414d-9365-d4d4dcf3b265

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Date deposited: 30 Oct 2020 17:31
Last modified: 30 Oct 2020 17:31

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Contributors

Author: R. Carmigniani
Author: S. Lapointe
Author: S. Symon
Author: B. J. McKeon

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