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Browse Journals & Magazines > Applied Physics Letters ...> Volume:93 Issue:15 Help

Geometry-controlled droplet generation in head-on microfluidic devices

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4 Author(s)
Shui, Lingling ; BIOS/Lab-on-a-Chip Group, MESA+Institute for Nanotechnology, University of Twente, 7500AE, Enschede, The Netherlands ; Mugele, Frieder ; van den Berg, Albert ; Eijkel, Jan C.T.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.3000624 

We investigated the generation of droplets in a head-on microfluidic device operated with the two identical channels as inlets and the “long leg” as a constriction channel leading to a wider outlet section. For capillary numbers (Ca) of approximately 10-5 or less, we find a Ca-independent droplet volume equal to the volume of the constriction channel, which decreases at higher Ca when shear forces become relevant. The droplet generation mechanism is explained in terms of a global capillary instability involving surprisingly stable intermediate surface configurations.

Published in:
Applied Physics Letters  (Volume:93 ,  Issue: 15 )

Date of Publication: Oct 2008

Page(s):
153113 - 153113-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.3000624
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Oct 2008

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