Droplet formation and its mechanism in a microchannel in the presence of an electric field

2018 ◽  
Vol 50 (5) ◽  
pp. 051404 ◽  
Author(s):  
S Altundemir ◽  
P Eribol ◽  
A K Uğuz
Keyword(s):  
Electric Field ◽  
Droplet Formation

Simultaneous Water Droplet Formation and Sorting Using an Electric Field

2008 ◽  
Author(s):  
Byungwook Ahn ◽  
Rajagopal Panchapakesan ◽  
Kangsun Lee ◽  
Kwang W. Oh
Keyword(s):  
Electric Field ◽  
High Throughput ◽  
Biomedical Research ◽  
Water Droplet ◽  
Droplet Formation ◽  
Electrical Actuation ◽  
Microfluidic Technology ◽  
Droplet Sorting ◽  
Control Water

The droplet-based microfluidic technology has a potent high throughput platform for biomedical research and applications [1]. Recently, Link et al. showed that an electric field can be very useful to control water droplet in carrier oil [2]. In this research, simultaneous droplet formation and sorting has been demonstrated using an electric field, allowing very precise droplet sorting to different outlets depending on the electrical actuation.

AC electric field controlled non-Newtonian filament thinning and droplet formation on the microscale

Lab on a Chip ◽  
2017 ◽  
Vol 17 (17) ◽  
pp. 2969-2981 ◽  
Author(s):  
Y. Huang ◽  
Y. L. Wang ◽  
T. N. Wong
Keyword(s):  
Flow Field ◽  
Electric Field ◽  
Newtonian Fluid ◽  
High Speed ◽  
Droplet Formation ◽  
Particle Imaging Velocimetry ◽  
Ac Electric Field ◽  
Formation Dynamics ◽  
Particle Imaging ◽  
First Time

We investigate the AC electric field controlled filament thinning and droplet formation dynamics of one non-Newtonian fluid. Furthermore, for the first time, we quantitatively measure the flow field of the non-Newtonian droplet formation under the influence of AC electric field, via a high-speed micro particle imaging velocimetry (μPIV) system. We discover the viscoelasticity contributes to the discrepancies majorly.

Shear-thinning droplet formation inside a microfluidic T-junction under an electric field

2021 ◽  
Author(s):  
Nasir Amiri ◽  
Mohammadmahdi Honarmand ◽  
Mahdi Dizani ◽  
Ali Moosavi ◽  
Siamak Kazemzadeh Hannani
Keyword(s):  
Electric Field ◽  
Shear Thinning ◽  
Droplet Formation

scholarly journals Experimental study on liquid spray and small droplet formation in ethanol-oil system in a DC electric field

2019 ◽  
Vol 1 (2) ◽  
pp. 8-14
Author(s):  
Dongbao Wang ◽  
Junfeng Wang ◽  
Piyaphong Yongphet
Keyword(s):  
Experimental Study ◽  
Electric Field ◽  
High Speed ◽  
Droplet Size Distribution ◽  
Interfacial Area ◽  
Droplet Formation ◽  
Immiscible Liquid ◽  
Low Flow ◽  
Flow Rates ◽  
Liquid Spray

A detailed experimental study on the evolution process of charged liquid deformation and breakup in another immiscible liquid from a capillary channel was conducted at micro-scale. By means of high-speed microscopy technique, various liquid spray modes and droplet formation processes were illustrated in detail at different flow rates and voltages. The effects of Reynolds (Re) and electric Bond (BoE) number on droplet size distribution were analyzed. It was found that droplet sizes rose with increasing Re while declined with increasing BoE. The experimental results show that electric field could promote interfacial area through decreasing interfacial tension to augment mass transfer between immiscible liquids at low flow rates. Besides, liquid spray experienced drip, deformation, breakup and jet modes with the increase of flow rate and electric potential. A critical Re of 170 was obtained beyond which electric field had little effect on liquid dynamic behaviors.

scholarly journals Droplet Formation in a T-Junction Microfluidic Device in the Presence of an Electric Field

2015 ◽  
Author(s):  
Zeeshan Ahmad ◽  
Rattandeep Singh ◽  
Supreet Singh Bahga ◽  
Amit Gupta
Keyword(s):  
Electric Field ◽  
Microfluidic Device ◽  
Lattice Boltzmann ◽  
Droplet Formation ◽  
Continuous Phase ◽  
Immiscible Fluids ◽  
Multiphase Model ◽  
Dispersed Phases ◽  
Rate Ratios ◽  
Boltzmann Method

In this work, the effect of applying an electric field on droplet formation in a T-junction microfluidic device is examined by simulations based on a recent technique known as lattice Boltzmann method (LBM). The electric field is applied in the main channel just beyond the confluence of the continuous and dispersed phases. A combined electrohydrodynamics-multiphase model that can simulate the flow of immiscible fluids in the presence of an electric field is developed and validated. The same model is then applied to study the droplet formation process in a T-junction microfluidic device at a capillary number of 0.01 and at different dispersed to continuous phase flow rate ratios. Results show that there is a decrease in the droplet size and an increase in formation frequency as the electric field is increased. The interplay of the electric and interfacial forces on droplet formation is investigated.

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