Repeated bouncing of drops on wetting and non-wetting surfaces mediated by a persisting thin air film

Research output: Contribution to conferenceAbstractOther research output

Abstract

Abstract Submitted for the DFD14 Meeting of The American Physical Society Repeated bouncing of drops on wetting and non-wetting sur- faces mediated by a persisting thin air lm JOLET DE RUITER, RUDY LAGRAAUW, DIRK VAN DEN ENDE, FRIEDER MUGELE, MESA+ Institute for Nanotechnology, University of Twente — Liquid drops impinging onto solid surfaces undergo a variety of impact scenarios such as splashing, sticking, and bouncing, depending on impact conditions and substrate properties. Bouncing requires efficient conversion of initial kinetic energy into surface energy and back into kinetic energy. This process is believed to be limited to non-wetting, in particular superhydrophobic surfaces, for which viscous dissipation during drop-substrate contact is minimal. Here, we report a novel bouncing mechanism that applies equally to non-wetting and wetting systems for flat surfaces with contact angles down to 10 degrees. For initial impact speeds up to about 0.5 m/s we demonstrate using dual wavelength interferometry that aqueous and non-aqueous drops remain separated from the substrate by air films of (sub)micrometer thickness at all times throughout a series of up to 16 consecutive bouncing events. We show that the purely dissipative force arising from the viscous squeeze-out of air is responsible for both the momentum transfer and for a substantial part of the residual energy dissipation. Jolet de Ruiter MESA+ Institute for Nanotechnology, University of Twente Date submitted: 31 Jul 2014 Electronic form version 1.4
Original languageEnglish
Pages-
Publication statusPublished - 23 Nov 2014
Event67th Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 2014 - San Francisco, United States
Duration: 23 Nov 201425 Nov 2014
Conference number: 67

Conference

Conference67th Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 2014
Abbreviated titleAPS-DFD
CountryUnited States
CitySan Francisco
Period23/11/1425/11/14

Fingerprint

wetting
nanotechnology
consecutive events
air
splashing
mesas
trucks
surface energy
micrometers
flat surfaces
interferometry
dissipation
energy dissipation
kinetic energy
electronics

Keywords

  • METIS-308392
  • IR-93811

Cite this

de Ruiter, J., Lagraauw, R., van den Ende, H. T. M., & Mugele, F. G. (2014). Repeated bouncing of drops on wetting and non-wetting surfaces mediated by a persisting thin air film. -. Abstract from 67th Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 2014, San Francisco, United States.
de Ruiter, J. ; Lagraauw, R. ; van den Ende, Henricus T.M. ; Mugele, Friedrich Gunther. / Repeated bouncing of drops on wetting and non-wetting surfaces mediated by a persisting thin air film. Abstract from 67th Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 2014, San Francisco, United States.
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title = "Repeated bouncing of drops on wetting and non-wetting surfaces mediated by a persisting thin air film",
abstract = "Abstract Submitted for the DFD14 Meeting of The American Physical Society Repeated bouncing of drops on wetting and non-wetting sur- faces mediated by a persisting thin air lm JOLET DE RUITER, RUDY LAGRAAUW, DIRK VAN DEN ENDE, FRIEDER MUGELE, MESA+ Institute for Nanotechnology, University of Twente — Liquid drops impinging onto solid surfaces undergo a variety of impact scenarios such as splashing, sticking, and bouncing, depending on impact conditions and substrate properties. Bouncing requires efficient conversion of initial kinetic energy into surface energy and back into kinetic energy. This process is believed to be limited to non-wetting, in particular superhydrophobic surfaces, for which viscous dissipation during drop-substrate contact is minimal. Here, we report a novel bouncing mechanism that applies equally to non-wetting and wetting systems for flat surfaces with contact angles down to 10 degrees. For initial impact speeds up to about 0.5 m/s we demonstrate using dual wavelength interferometry that aqueous and non-aqueous drops remain separated from the substrate by air films of (sub)micrometer thickness at all times throughout a series of up to 16 consecutive bouncing events. We show that the purely dissipative force arising from the viscous squeeze-out of air is responsible for both the momentum transfer and for a substantial part of the residual energy dissipation. Jolet de Ruiter MESA+ Institute for Nanotechnology, University of Twente Date submitted: 31 Jul 2014 Electronic form version 1.4",
keywords = "METIS-308392, IR-93811",
author = "{de Ruiter}, J. and R. Lagraauw and {van den Ende}, {Henricus T.M.} and Mugele, {Friedrich Gunther}",
note = "Abstract: D12.00006. Abstract ID: BAPS.2014.DFD.D12.6 ; 67th Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 2014, APS-DFD ; Conference date: 23-11-2014 Through 25-11-2014",
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de Ruiter, J, Lagraauw, R, van den Ende, HTM & Mugele, FG 2014, 'Repeated bouncing of drops on wetting and non-wetting surfaces mediated by a persisting thin air film' 67th Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 2014, San Francisco, United States, 23/11/14 - 25/11/14, pp. -.

Repeated bouncing of drops on wetting and non-wetting surfaces mediated by a persisting thin air film. / de Ruiter, J.; Lagraauw, R.; van den Ende, Henricus T.M.; Mugele, Friedrich Gunther.

2014. - Abstract from 67th Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 2014, San Francisco, United States.

Research output: Contribution to conferenceAbstractOther research output

TY - CONF

T1 - Repeated bouncing of drops on wetting and non-wetting surfaces mediated by a persisting thin air film

AU - de Ruiter, J.

AU - Lagraauw, R.

AU - van den Ende, Henricus T.M.

AU - Mugele, Friedrich Gunther

N1 - Abstract: D12.00006. Abstract ID: BAPS.2014.DFD.D12.6

PY - 2014/11/23

Y1 - 2014/11/23

N2 - Abstract Submitted for the DFD14 Meeting of The American Physical Society Repeated bouncing of drops on wetting and non-wetting sur- faces mediated by a persisting thin air lm JOLET DE RUITER, RUDY LAGRAAUW, DIRK VAN DEN ENDE, FRIEDER MUGELE, MESA+ Institute for Nanotechnology, University of Twente — Liquid drops impinging onto solid surfaces undergo a variety of impact scenarios such as splashing, sticking, and bouncing, depending on impact conditions and substrate properties. Bouncing requires efficient conversion of initial kinetic energy into surface energy and back into kinetic energy. This process is believed to be limited to non-wetting, in particular superhydrophobic surfaces, for which viscous dissipation during drop-substrate contact is minimal. Here, we report a novel bouncing mechanism that applies equally to non-wetting and wetting systems for flat surfaces with contact angles down to 10 degrees. For initial impact speeds up to about 0.5 m/s we demonstrate using dual wavelength interferometry that aqueous and non-aqueous drops remain separated from the substrate by air films of (sub)micrometer thickness at all times throughout a series of up to 16 consecutive bouncing events. We show that the purely dissipative force arising from the viscous squeeze-out of air is responsible for both the momentum transfer and for a substantial part of the residual energy dissipation. Jolet de Ruiter MESA+ Institute for Nanotechnology, University of Twente Date submitted: 31 Jul 2014 Electronic form version 1.4

AB - Abstract Submitted for the DFD14 Meeting of The American Physical Society Repeated bouncing of drops on wetting and non-wetting sur- faces mediated by a persisting thin air lm JOLET DE RUITER, RUDY LAGRAAUW, DIRK VAN DEN ENDE, FRIEDER MUGELE, MESA+ Institute for Nanotechnology, University of Twente — Liquid drops impinging onto solid surfaces undergo a variety of impact scenarios such as splashing, sticking, and bouncing, depending on impact conditions and substrate properties. Bouncing requires efficient conversion of initial kinetic energy into surface energy and back into kinetic energy. This process is believed to be limited to non-wetting, in particular superhydrophobic surfaces, for which viscous dissipation during drop-substrate contact is minimal. Here, we report a novel bouncing mechanism that applies equally to non-wetting and wetting systems for flat surfaces with contact angles down to 10 degrees. For initial impact speeds up to about 0.5 m/s we demonstrate using dual wavelength interferometry that aqueous and non-aqueous drops remain separated from the substrate by air films of (sub)micrometer thickness at all times throughout a series of up to 16 consecutive bouncing events. We show that the purely dissipative force arising from the viscous squeeze-out of air is responsible for both the momentum transfer and for a substantial part of the residual energy dissipation. Jolet de Ruiter MESA+ Institute for Nanotechnology, University of Twente Date submitted: 31 Jul 2014 Electronic form version 1.4

KW - METIS-308392

KW - IR-93811

M3 - Abstract

SP - -

ER -

de Ruiter J, Lagraauw R, van den Ende HTM, Mugele FG. Repeated bouncing of drops on wetting and non-wetting surfaces mediated by a persisting thin air film. 2014. Abstract from 67th Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 2014, San Francisco, United States.