Next Article in Journal
Effect of Process Parameters on Flow Length and Flash Formation in Injection Moulding of High Aspect Ratio Polymeric Micro Features
Previous Article in Journal
Continuous Near-Field Electrospraying Using a Glass Capillary Nozzle
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Micromachines 2018, 9(2), 57; doi:10.3390/mi9020057

Droplet Breakup Dynamics in Bi-Layer Bifurcating Microchannel

1
Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Ningbo China, Ningbo 315100, China
2
School of Engineering and Physical Sciences, Heriot-Watt University Malaysia, No. 1 Jalan Venna P5/2, Precinct 5, 62200 Putrajaya, Malaysia
3
Department of Chemical Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK
4
Institute of Advanced Study, Shenzhen University, Nanshan District, Shenzhen 518060, China
5
Research Group of Fluids and Thermal Engineering, University of Nottingham Ningbo China, Ningbo 315100, China
6
Research Group of Fluids and Thermal Engineering, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK
*
Author to whom correspondence should be addressed.
Received: 30 November 2017 / Revised: 20 January 2018 / Accepted: 28 January 2018 / Published: 31 January 2018
View Full-Text   |   Download PDF [5140 KB, uploaded 31 January 2018]   |  

Abstract

Breakup of droplets at bi-layer bifurcating junction in polydimethylsiloxane (PDMS) microchannel has been investigated by experiments and numerical simulation. The pressure drop in bi-layer bifurcating channel was investigated and compared with single-layer bifurcating channel. Daughter droplet size variation generated in bi-layer bifurcating microchannel was analyzed. The correlation was proposed to predict the transition between breakup and non-breakup conditions of droplets in bi-layer bifurcating channel using a phase diagram. In the non-breakup regime, droplets exiting port can be switched via tuning flow resistance by controlling radius of curvature, and or channel height ratio. Compared with single-layer bifurcating junction, 3-D cutting in diagonal direction from bi-layer bifurcating junction induces asymmetric fission to form daughter droplets with distinct sizes while each size has good monodispersity. Lower pressure drop is required in the new microsystem. The understanding of the droplet fission in the novel microstructure will enable more versatile control over the emulsion formation, fission and sorting. The model system can be developed to investigate the encapsulation and release kinetics of emulsion templated particles such as drug encapsulated microcapsules as they flow through complex porous media structures, such as blood capillaries or the porous tissue structures, which feature with bifurcating junctions. View Full-Text
Keywords: microfluidics; droplet fission; encapsulation; emulsions; breakup microfluidics; droplet fission; encapsulation; emulsions; breakup
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Ren, Y.; Koh, K.S.; Yew, M.; Chin, J.K.; Chan, Y.; Yan, Y. Droplet Breakup Dynamics in Bi-Layer Bifurcating Microchannel. Micromachines 2018, 9, 57.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Micromachines EISSN 2072-666X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top