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

Carmigniani, R. and Lapointe, S. and 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 . pp. 237-246. ISSN 0894-1777 .

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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.

Item Type:Article
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URLURL TypeDescription DOIArticle
McKeon, B. J.0000-0003-4220-1583
Additional Information:© 2014 Elsevier Inc. Received 21 August 2013; Received in revised form 24 December 2013; Accepted 26 December 2013; Available online 11 January 2014. Support from a National Science Foundation Graduate Fellowship (S.S.) and the Graduate Aerospace Laboratories at the California Institute of Technology is gratefully acknowledged.
Funding AgencyGrant Number
NSF Graduate FellowshipUNSPECIFIED
Caltech Graduate Aerospace LaboratoriesUNSPECIFIED
Subject Keywords:Bouncing drops; Particle-wave interaction; Walking drops; Change of depth; Pilot wave theory
Record Number:CaltechAUTHORS:20140502-074953981
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Official Citation:R. Carmigniani, S. Lapointe, S. Symon, B.J. McKeon, Influence of a local change of depth on the behavior of walking oil drops, Experimental Thermal and Fluid Science, Volume 54, April 2014, Pages 237-246, ISSN 0894-1777, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45455
Deposited By: Tony Diaz
Deposited On:02 May 2014 18:50
Last Modified:21 Sep 2016 22:21

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