Microscale acoustofluidics: Microfluidics driven via acoustics and ultrasonics

J Friend, LY Yeo - Reviews of Modern Physics, 2011 - APS
This article reviews acoustic microfluidics: the use of acoustic fields, principally ultrasonics,
for application in microfluidics. Although acoustics is a classical field, its promising, and …

Acoustic levitation of liquid drops: Dynamics, manipulation and phase transitions

D Zang, Y Yu, Z Chen, X Li, H Wu, X Geng - Advances in colloid and …, 2017 - Elsevier
The technique of acoustic levitation normally produces a standing wave and the potential
well of the sound field can be used to trap small objects. Since no solid surface is involved it …

Stability of constrained capillary surfaces

JB Bostwick, PH Steen - Annual Review of Fluid Mechanics, 2015 - annualreviews.org
A capillary surface is an interface between two fluids whose shape is determined primarily
by surface tension. Sessile drops, liquid bridges, rivulets, and liquid drops on fibers are all …

Dynamics of ultrasonic atomization of droplets

P Deepu, C Peng, S Moghaddam - Experimental Thermal and Fluid …, 2018 - Elsevier
We investigate the atomization behavior of a droplet subjected to ultrasonic substrate
vibration experimentally. High-speed imaging is employed to quantify the average …

Dynamics of sessile drops. Part 1. Inviscid theory

JB Bostwick, PH Steen - Journal of fluid mechanics, 2014 - cambridge.org
A sessile droplet partially wets a planar solid support. We study the linear stability of this
spherical-cap base state to disturbances whose three-phase contact line is (i) pinned,(ii) …

Effects of gravity on natural oscillations of sessile drops

F Zhang, X Zhou, H Ding - Journal of Fluid Mechanics, 2023 - cambridge.org
Natural oscillations of sessile drops with a free or pinned contact line in different gravity
environments are studied based on a linear inviscid irrotational theory. The inviscid Navier …

Frequency dependence and frequency control of microbubble streaming flows

C Wang, B Rallabandi, S Hilgenfeldt - Physics of Fluids, 2013 - pubs.aip.org
Steady streaming from oscillating microbubbles is a powerful actuating mechanism in
microfluidics, enjoying increased use due to its simplicity of manufacture, ease of integration …

Capillary oscillations of a constrained liquid drop

JB Bostwick, PH Steen - Physics of Fluids, 2009 - pubs.aip.org
An inviscid spherical liquid drop held by surface tension exhibits linear oscillations of a
characteristic frequency and mode shape (Rayleigh oscillations). If the drop is pinned on a …

Substrate constraint modifies the Rayleigh spectrum of vibrating sessile drops

CT Chang, JB Bostwick, PH Steen, S Daniel - Physical Review E—Statistical …, 2013 - APS
In this work, we study the resonance behavior of mechanically oscillated, sessile water
drops. By mechanically oscillating sessile drops vertically and within prescribed ranges of …

Stick-slip dynamics of an oscillated sessile drop

IS Fayzrakhmanova, AV Straube - Physics of fluids, 2009 - pubs.aip.org
We consider theoretically the dynamics of an oscillated sessile drop of incompressible liquid
and focus on the contact line hysteresis. We address the situation of the small-amplitude and …