Inertio-elastic mixing in a straight microchannel with side wells

Hong, Sun Ok, Cooper-White, Justin J. and Kim, Ju Min (2016) Inertio-elastic mixing in a straight microchannel with side wells. Applied Physics Letters, 108 1: . doi:10.1063/1.4939552

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Author Hong, Sun Ok
Cooper-White, Justin J.
Kim, Ju Min
Title Inertio-elastic mixing in a straight microchannel with side wells
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
1077-3118
Publication date 2016-01-01
Sub-type Article (original research)
DOI 10.1063/1.4939552
Open Access Status File (Publisher version)
Volume 108
Issue 1
Total pages 4
Place of publication Melville, United States
Publisher A I P Publishing LLC
Language eng
Formatted abstract
Mixing remains a challenging task in microfluidic channels because of their inherently small length scale. In this work, we propose an efficient microfluidic mixer based on the chaotic vortex dynamics of a viscoelasticflow in a straight channel with side wells. When the inertia and elasticity of a dilute polymer solution are balanced (i.e., the Reynolds number Re and Weissenberg number Wi are both on the order of 101), chaotic vortices appear in the side wells (inertio-elastic flow instability), enhancing the mixing of adjacent fluid streams. However, there is no chaotic vortex motion in Newtonian flows for any flow rate. Efficient mixing by such an inertio-elastic instability is found to be relevant for a wide range of Re values.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
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