Drop motion induced by vertical vibrations

Paolo Sartori, Damiano Quagliati, Silvia Varagnolo, Matteo Pierno, Giampaolo Mistura, Francesco Magaletti, Carlo Massimo Casciola

Research output: Contribution to journalArticle

Abstract

We have studied the motion of liquid drops on an inclined plate subject to vertical vibrations. The liquids comprised distilled water and different aqueous solutions of glycerol, ethanol and isopropanol spanning the range 1-39 mm2 s-1 in kinematic viscosities and 40-72 mN m-1 in surface tension. At sufficiently low oscillating amplitudes, the drops are always pinned to the surface. Vibrating the plate above a certain amplitude yields sliding of the drop. Further increasing the oscillating amplitude drives the drop upward against gravity. In the case of the most hydrophilic aqueous solutions, this motion is not observed and the drop only slides downward. Images taken with a fast camera show that the drop profile evolves in a different way during sliding and climbing. In particular, the climbing drop experiences a much bigger variation in its profile during an oscillating period. Complementary numerical simulations of 2D drops based on a diffuse interface approach confirm the experimental findings. The overall qualitative behavior is reproduced suggesting that the contact line pinning due to contact angle hysteresis is not necessary to explain the drop climbing.

Original languageEnglish
Article number113017
JournalNew Journal of Physics
Volume17
Issue number11
DOIs
Publication statusPublished - 3 Nov 2015

Fingerprint

vibration
sliding
aqueous solutions
profiles
glycerols
chutes
interfacial tension
ethyl alcohol
kinematics
hysteresis
cameras
viscosity
gravitation
liquids
water
simulation

Bibliographical note

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Keywords

  • drop actuation
  • moving drops
  • vertical vibrations

Cite this

Sartori, P., Quagliati, D., Varagnolo, S., Pierno, M., Mistura, G., Magaletti, F., & Casciola, C. M. (2015). Drop motion induced by vertical vibrations. New Journal of Physics, 17(11), [113017]. https://doi.org/10.1088/1367-2630/17/11/113017
Sartori, Paolo ; Quagliati, Damiano ; Varagnolo, Silvia ; Pierno, Matteo ; Mistura, Giampaolo ; Magaletti, Francesco ; Casciola, Carlo Massimo. / Drop motion induced by vertical vibrations. In: New Journal of Physics. 2015 ; Vol. 17, No. 11.
@article{3fcab253fa724062806cfce94eafc7f4,
title = "Drop motion induced by vertical vibrations",
abstract = "We have studied the motion of liquid drops on an inclined plate subject to vertical vibrations. The liquids comprised distilled water and different aqueous solutions of glycerol, ethanol and isopropanol spanning the range 1-39 mm2 s-1 in kinematic viscosities and 40-72 mN m-1 in surface tension. At sufficiently low oscillating amplitudes, the drops are always pinned to the surface. Vibrating the plate above a certain amplitude yields sliding of the drop. Further increasing the oscillating amplitude drives the drop upward against gravity. In the case of the most hydrophilic aqueous solutions, this motion is not observed and the drop only slides downward. Images taken with a fast camera show that the drop profile evolves in a different way during sliding and climbing. In particular, the climbing drop experiences a much bigger variation in its profile during an oscillating period. Complementary numerical simulations of 2D drops based on a diffuse interface approach confirm the experimental findings. The overall qualitative behavior is reproduced suggesting that the contact line pinning due to contact angle hysteresis is not necessary to explain the drop climbing.",
keywords = "drop actuation, moving drops, vertical vibrations",
author = "Paolo Sartori and Damiano Quagliati and Silvia Varagnolo and Matteo Pierno and Giampaolo Mistura and Francesco Magaletti and Casciola, {Carlo Massimo}",
note = "Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.",
year = "2015",
month = "11",
day = "3",
doi = "10.1088/1367-2630/17/11/113017",
language = "English",
volume = "17",
journal = "New Journal of Physics",
issn = "1367-2630",
number = "11",

}

Sartori, P, Quagliati, D, Varagnolo, S, Pierno, M, Mistura, G, Magaletti, F & Casciola, CM 2015, 'Drop motion induced by vertical vibrations', New Journal of Physics, vol. 17, no. 11, 113017. https://doi.org/10.1088/1367-2630/17/11/113017

Drop motion induced by vertical vibrations. / Sartori, Paolo; Quagliati, Damiano; Varagnolo, Silvia; Pierno, Matteo; Mistura, Giampaolo; Magaletti, Francesco; Casciola, Carlo Massimo.

In: New Journal of Physics, Vol. 17, No. 11, 113017, 03.11.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Drop motion induced by vertical vibrations

AU - Sartori, Paolo

AU - Quagliati, Damiano

AU - Varagnolo, Silvia

AU - Pierno, Matteo

AU - Mistura, Giampaolo

AU - Magaletti, Francesco

AU - Casciola, Carlo Massimo

N1 - Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

PY - 2015/11/3

Y1 - 2015/11/3

N2 - We have studied the motion of liquid drops on an inclined plate subject to vertical vibrations. The liquids comprised distilled water and different aqueous solutions of glycerol, ethanol and isopropanol spanning the range 1-39 mm2 s-1 in kinematic viscosities and 40-72 mN m-1 in surface tension. At sufficiently low oscillating amplitudes, the drops are always pinned to the surface. Vibrating the plate above a certain amplitude yields sliding of the drop. Further increasing the oscillating amplitude drives the drop upward against gravity. In the case of the most hydrophilic aqueous solutions, this motion is not observed and the drop only slides downward. Images taken with a fast camera show that the drop profile evolves in a different way during sliding and climbing. In particular, the climbing drop experiences a much bigger variation in its profile during an oscillating period. Complementary numerical simulations of 2D drops based on a diffuse interface approach confirm the experimental findings. The overall qualitative behavior is reproduced suggesting that the contact line pinning due to contact angle hysteresis is not necessary to explain the drop climbing.

AB - We have studied the motion of liquid drops on an inclined plate subject to vertical vibrations. The liquids comprised distilled water and different aqueous solutions of glycerol, ethanol and isopropanol spanning the range 1-39 mm2 s-1 in kinematic viscosities and 40-72 mN m-1 in surface tension. At sufficiently low oscillating amplitudes, the drops are always pinned to the surface. Vibrating the plate above a certain amplitude yields sliding of the drop. Further increasing the oscillating amplitude drives the drop upward against gravity. In the case of the most hydrophilic aqueous solutions, this motion is not observed and the drop only slides downward. Images taken with a fast camera show that the drop profile evolves in a different way during sliding and climbing. In particular, the climbing drop experiences a much bigger variation in its profile during an oscillating period. Complementary numerical simulations of 2D drops based on a diffuse interface approach confirm the experimental findings. The overall qualitative behavior is reproduced suggesting that the contact line pinning due to contact angle hysteresis is not necessary to explain the drop climbing.

KW - drop actuation

KW - moving drops

KW - vertical vibrations

UR - http://www.scopus.com/inward/record.url?scp=84948457770&partnerID=8YFLogxK

U2 - 10.1088/1367-2630/17/11/113017

DO - 10.1088/1367-2630/17/11/113017

M3 - Article

AN - SCOPUS:84948457770

VL - 17

JO - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

IS - 11

M1 - 113017

ER -

Sartori P, Quagliati D, Varagnolo S, Pierno M, Mistura G, Magaletti F et al. Drop motion induced by vertical vibrations. New Journal of Physics. 2015 Nov 3;17(11). 113017. https://doi.org/10.1088/1367-2630/17/11/113017