Title

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

Authors

Authors

E. Y. Tafti; R. Kumar;H. J. Cho

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Appl. Phys. Lett.

Keywords

MICROCHANNELS; MIXER; Physics, Applied

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. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2996564]

Journal Title

Applied Physics Letters

Volume

93

Issue/Number

14

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

3

WOS Identifier

WOS:000259965400072

ISSN

0003-6951

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