A novel electrokinetic micromixer

Hsin Yu Wu, Cheng Hsien Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

A novel microfluidic mixer based on the modulation of ζ-potential is proposed and demonstrated successfully. In contrast to previous micromixer work from other groups, this micromixer does not need complex three-dimensional serpentine microstructure or external pumps to generate chaotic advection pulsatile flow. The mathematical models for ζ-potential variation, induced pressure distribution, volumetric flow rate, and the velocity profile in a rectangular cross-section microchannel is derived and show the mixing effect of varying ζ-potential. Numerical simulation results utilizing CFD-ACE+ indicate the good mixing efficiency for our micromixer design with asymmetric herringbone electrodes and periodic voltage control. The microfabrication process for our electrokinetic micromixer has been developed successfully. Experimental results demonstrate a great mixing enhancement via our microfluidic mixer. Our electrokinetic micromixer design can induce complex flow fields easily to enhance the mixing effect by appropriate modulations of the ζ-potential. The work reported here considers for the first time temporal/spatial ζ-potential modulation for microfluidic mixer applications.

Original languageEnglish
Title of host publicationTRANSDUCERS 2003 - 12th International Conference on Solid-State Sensors, Actuators and Microsystems, Digest of Technical Papers
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages631-634
Number of pages4
Volume1
ISBN (Print)0780377311, 9780780377318
DOIs
Publication statusPublished - 2003
Externally publishedYes
Event12th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2003 - Digest of Technical Papers - Boston, United States
Duration: Jun 8 2003Jun 12 2003

Other

Other12th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2003 - Digest of Technical Papers
CountryUnited States
CityBoston
Period6/8/036/12/03

Keywords

  • Actuators
  • Chaos
  • Electrokinetics
  • Fluid flow control
  • Mathematical model
  • Mechanical engineering
  • Microchannel
  • Microfluidics
  • Navier-Stokes equations
  • Numerical simulation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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