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Liquid-body resonance while contacting a rotating superhydrophobic surface
Chong, Matthew Lai Ho Cheng, Michael Katariya, Mayur Muradoglu, Murat Cheong, Brandon Huey-Ping Zahidi, Alifa Afiah Ahmad Yu, Yang Liew, Oi Wah Ng, Tuck Wah
Chong, Matthew Lai Ho
Cheng, Michael
Katariya, Mayur
Muradoglu, Murat
Cheong, Brandon Huey-Ping
Zahidi, Alifa Afiah Ahmad
Yu, Yang
Liew, Oi Wah
Ng, Tuck Wah
Abstract
We advance a scheme in which a liquid body on a stationary tip in contact with a rotating superhydrophobic surface is able to maintain resonance primarily from stick-slip events. With tip-to-surface spacing in the range 2.73≤h < 2.452.73≤h < 2.45 mm for a volume of 10 μL, the liquid body was found to exhibit resonance independent of the speed of the drum. The mechanics were found to be due to a surface-tension-controlled vibration mode based on the natural frequency values determined. With spacing in the range 2.45≤h < 2.152.45≤h < 2.15 mm imposed for a volume of 10 μL, the contact length of the liquid body was found to vary with rotation of the SH drum. This was due to the stick-slip events being able to generate higher energy fluctuations causing the liquid-solid contact areas to vary since the almost oblate spheroid shape of the liquid body had intrinsically higher surface energies. This resulted in the natural frequency perturbations being frequency- and amplitude-modulated over a lower frequency carrier. These findings have positive implications for microfluidic sensing.
Keywords
Date
2015
Type
Journal article
Journal
The European Physical Journal E
Book
Volume
38
Issue
119
Page Range
1-9
Article Number
ACU Department
School of Behavioural and Health Sciences
Faculty of Health Sciences
Faculty of Health Sciences
Relation URI
Source URL
Event URL
Open Access Status
License
File Access
Controlled