TITLE

Effect of laminar velocity profile variation on mixing in microfluidic devices: The sigma micromixer

AUTHOR(S)
Yakhshi Tafti, Ehsan; Kumar, Ranganathan; Cho, Hyoung J.
PUB. DATE
October 2008
SOURCE
Applied Physics Letters;10/6/2008, Vol. 93 Issue 14, p143504
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The effect of the laminar velocity profile and its variation on mixing phenomena at the reduced scale is studied. It is shown that the diffusive mass flux between two miscible streams, flowing laminar in a microchannel, is enhanced if the velocity at their diffusion interface is increased. Based on this idea, an in-plane passive micromixing concept is proposed and implemented in a working device (sigma micromixer). This mixer shows considerable mixing performance by periodically varying the flow velocity profile, such that the maximum of the profile coincides with the transversely progressing diffusion fronts repeatedly throughout the mixing channel.
ACCESSION #
34850424

 

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