Application of electrokinetic instability flow for enhanced micromixing in cross-shaped microchannel

Min Zhong Huang, Ruey Jen Yang, Chang Hsien Tai, Chien Hsiung Tsai, Lung Ming Fu

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)


This paper proposes a cross-shaped micromixer featuring a pair barrier within the mixing channel. The proposed device obtains a rapid mixing of two sample fluids by means of the electrokinetic instability-induced shedding effects which are produced when a DC electric field of an appropriate intensity is applied. The proposed device uses a single high-voltage power source to simultaneously drive and mix the sample fluids. The effectiveness of the mixer is characterized experimentally as a function of the applied electric field intensity and the extent to which a pair barrier obstruct the mixing channel. The experimental results indicate that the mixing performance reaches 96% at a cross-section located 1 mm downstream of the cross-junction when an electric field of 300 V/cm is applied. The micromixing method presented in this study provides a simple low-cost solution to mixing problems in lab-on-a-chip systems.

Original languageEnglish
Pages (from-to)309-315
Number of pages7
JournalBiomedical Microdevices
Issue number4
Publication statusPublished - 2006 Dec

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Molecular Biology


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