Droplets sliding down a vertical surface under increasing horizontal forces

Sirui Tang; Yagnavalkya Bhimavarapu; Semih Gulec; Ratul Das; Jie Liu; Hartmann N'guessan; Taylor Whitehead; Chun Wei Yao; Rafael Tadmor

doi:https://doi.org/10.1021/acs.langmuir.8b04157

Droplets sliding down a vertical surface under increasing horizontal forces

Sirui Tang, Yagnavalkya Bhimavarapu, Semih Gulec, Ratul Das, Jie Liu, Hartmann N'guessan, Taylor Whitehead, Chun Wei Yao, Rafael Tadmor

Department of Mechanical Engineering

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

Abstract

We have investigated the retention forces of liquid drops on rotating, vertical surfaces. We considered two scenarios: in one, a horizontal, centrifugal force pushes the drop toward the surface ("pushed drop" case), and in the other, a horizontal, centrifugal force pulls the drop away from the surface ("pulled drop" case). Both drops slide down as the centrifugal force increases, although one expects that the pushed drop should remain stuck to the surface. Even more surprising, when the centrifugal force is low, the pushed drop moves faster than the pulled drop, but when the centrifugal force is high, the pushed drop moves much slower than the pulled drop. We explain these results in terms of interfacial modulus between the drop and the surface.

Original language	American English
Pages (from-to)	8191-8198
Number of pages	8
Journal	Langmuir
Volume	35
Issue number	25
DOIs	https://doi.org/10.1021/acs.langmuir.8b04157
State	Published - 25 Jun 2019

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Spectroscopy
General Materials Science
Surfaces and Interfaces
Electrochemistry

Access to Document

https://doi.org/10.1021/acs.langmuir.8b04157

Cite this

@article{e4c6ac578866442da11080bbcf36e0db,

title = "Droplets sliding down a vertical surface under increasing horizontal forces",

abstract = "We have investigated the retention forces of liquid drops on rotating, vertical surfaces. We considered two scenarios: in one, a horizontal, centrifugal force pushes the drop toward the surface ({"}pushed drop{"} case), and in the other, a horizontal, centrifugal force pulls the drop away from the surface ({"}pulled drop{"} case). Both drops slide down as the centrifugal force increases, although one expects that the pushed drop should remain stuck to the surface. Even more surprising, when the centrifugal force is low, the pushed drop moves faster than the pulled drop, but when the centrifugal force is high, the pushed drop moves much slower than the pulled drop. We explain these results in terms of interfacial modulus between the drop and the surface.",

author = "Sirui Tang and Yagnavalkya Bhimavarapu and Semih Gulec and Ratul Das and Jie Liu and Hartmann N'guessan and Taylor Whitehead and Yao, {Chun Wei} and Rafael Tadmor",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = jun,

day = "25",

doi = "https://doi.org/10.1021/acs.langmuir.8b04157",

language = "American English",

volume = "35",

pages = "8191--8198",

journal = "Langmuir",

issn = "0743-7463",

publisher = "American Chemical Society",

number = "25",

}

TY - JOUR

T1 - Droplets sliding down a vertical surface under increasing horizontal forces

AU - Tang, Sirui

AU - Bhimavarapu, Yagnavalkya

AU - Gulec, Semih

AU - Das, Ratul

AU - Liu, Jie

AU - N'guessan, Hartmann

AU - Whitehead, Taylor

AU - Yao, Chun Wei

AU - Tadmor, Rafael

PY - 2019/6/25

Y1 - 2019/6/25

N2 - We have investigated the retention forces of liquid drops on rotating, vertical surfaces. We considered two scenarios: in one, a horizontal, centrifugal force pushes the drop toward the surface ("pushed drop" case), and in the other, a horizontal, centrifugal force pulls the drop away from the surface ("pulled drop" case). Both drops slide down as the centrifugal force increases, although one expects that the pushed drop should remain stuck to the surface. Even more surprising, when the centrifugal force is low, the pushed drop moves faster than the pulled drop, but when the centrifugal force is high, the pushed drop moves much slower than the pulled drop. We explain these results in terms of interfacial modulus between the drop and the surface.

AB - We have investigated the retention forces of liquid drops on rotating, vertical surfaces. We considered two scenarios: in one, a horizontal, centrifugal force pushes the drop toward the surface ("pushed drop" case), and in the other, a horizontal, centrifugal force pulls the drop away from the surface ("pulled drop" case). Both drops slide down as the centrifugal force increases, although one expects that the pushed drop should remain stuck to the surface. Even more surprising, when the centrifugal force is low, the pushed drop moves faster than the pulled drop, but when the centrifugal force is high, the pushed drop moves much slower than the pulled drop. We explain these results in terms of interfacial modulus between the drop and the surface.

UR - http://www.scopus.com/inward/record.url?scp=85067983241&partnerID=8YFLogxK

U2 - https://doi.org/10.1021/acs.langmuir.8b04157

DO - https://doi.org/10.1021/acs.langmuir.8b04157

M3 - Article

C2 - 30990708

SN - 0743-7463

VL - 35

SP - 8191

EP - 8198

JO - Langmuir

JF - Langmuir

IS - 25

ER -

Droplets sliding down a vertical surface under increasing horizontal forces

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this