Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/94694
Title: | Behavior of microdroplets in diffuser/nozzle structures | Authors: | Liu, Jing Yap, Yit Fatt Nguyen, Nam-Trung |
Keywords: | DRNTU::Engineering::Mechanical engineering | Issue Date: | 2008 | Source: | Liu, J., Yap, Y. F., & Nguyen, N. T. (2008). Behavior of microdroplets in diffuser/nozzle structures. Microfluidics and Nanofluidics, 6(6), 835-846. | Series/Report no.: | Microfluidics and nanofluidics | Abstract: | This paper investigates the behavior of microdroplets flowing in microchannels with a series of diffuser/nozzle structures. Depending on the imposed flow direction, the serial structures can act either as a series of diffusers or nozzles. Different serial diffuser/nozzle microchannels with opening angles ranging from 15° to 45° were considered. A 2D numerical model was employed to study the dynamics of the microdroplet during its passage through the diffuser/nozzle structures. The deformation of the microdroplet was captured using a level set method. On the experimental front, test devices were fabricated in polydimethylsiloxane using soft lithography. T-junctions for droplet formation, diffuser/nozzle structures and pressure ports were integrated in a single device. Mineral oil with 2% w/w surfactant span 80 and de-ionized water with fluorescent worked as the carrier phase and the dispersed phase, respectively. The deformation of the water droplet and the corresponding pressure drop across the diffuser/nozzle structures were measured in both diffuser and nozzle configurations at a fixed flow rate ratio between oil and water of 30. The results show a linear relationship between the pressure drop and the flow rate. Furthermore, the rectification effect was observed in all tested devices. The pressure drop in the diffuser configuration is higher than that of the nozzle configuration. Finally, the pressure measured results with droplet and without droplet were analyzed and compared. | URI: | https://hdl.handle.net/10356/94694 http://hdl.handle.net/10220/7814 |
DOI: | 10.1007/s10404-008-0358-5 | Rights: | © 2008 Springer-Verlag. This is the author created version of a work that has been peer reviewed and accepted for publication by Microfluidics and nanofluidics, Springer-Verlag. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.1007/s10404-008-0358-5. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | MAE Journal Articles |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
139. Behavior of microdroplets in diffuser.pdf | 768.56 kB | Adobe PDF | ![]() View/Open |
SCOPUSTM
Citations
11
Updated on Jul 21, 2020
PublonsTM
Citations
12
Updated on Jan 18, 2021
Page view(s) 10
571
Updated on Jan 21, 2021
Download(s) 5
422
Updated on Jan 21, 2021
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.