Film Dynamics and Lubricant Depletion by Droplets Moving on Lubricated Surfaces

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Kreder, Michael J. Daniel, Dan Tetreault, Adam Cao, Zhenle Lemaire, Baptiste Timonen, Jaakko V.I. Aizenberg, Joanna 2018-10-16T08:55:37Z 2018-10-16T08:55:37Z 2018-08-04
dc.identifier.citation Kreder , M J , Daniel , D , Tetreault , A , Cao , Z , Lemaire , B , Timonen , J V I & Aizenberg , J 2018 , ' Film Dynamics and Lubricant Depletion by Droplets Moving on Lubricated Surfaces ' Physical Review X , vol 8 , no. 3 , 031053 , pp. 1-16 . DOI: 10.1103/PhysRevX.8.031053 en
dc.identifier.issn 2160-3308
dc.identifier.other PURE UUID: 8c67f756-95b2-4736-a4f5-c741be3a0131
dc.identifier.other PURE ITEMURL:
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dc.description.abstract Lubricated surfaces have shown promise in numerous applications where impinging foreign droplets must be removed easily; however, before they can be widely adopted, the problem of lubricant depletion, which eventually leads to decreased performance, must be solved. Despite recent progress, a quantitative mechanistic explanation for lubricant depletion is still lacking. Here, we first explain the shape of a droplet on a lubricated surface by balancing the Laplace pressures across interfaces. We then show that the lubricant film thicknesses beneath, behind, and wrapping around a moving droplet change dynamically with the droplet's speed - analogous to the classical Landau-Levich-Derjaguin problem. The interconnected lubricant dynamics results in the growth of the wetting ridge around the droplet, which is the dominant source of lubricant depletion. We then develop an analytic expression for the maximum amount of lubricant that can be depleted by a single droplet. Counterintuitively, faster-moving droplets subjected to higher driving forces deplete less lubricant than their slower-moving counterparts. The insights developed in this work will inform future work and the design of longer-lasting lubricated surfaces. en
dc.format.extent 1-16
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Physical Review X en
dc.relation.ispartofseries Volume 8, issue 3 en
dc.rights openAccess en
dc.subject.other Physics and Astronomy(all) en
dc.subject.other 114 Physical sciences en
dc.title Film Dynamics and Lubricant Depletion by Droplets Moving on Lubricated Surfaces en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Harvard University
dc.contributor.department Department of Applied Physics
dc.subject.keyword Physics and Astronomy(all)
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201810165377
dc.identifier.doi 10.1103/PhysRevX.8.031053
dc.type.version publishedVersion

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