Experimental investigation of electrokinetically generated in-plane vorticity in a microchannel

W. L W Hau, L. M. Lee, Y. K. Lee, Man Wong, Yitshak Zohar

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

9 Scopus citations

Abstract

Electrokinetic generation of micro-flow patterns has advanced in recent years and received significant attention due to promising applications in biotechnology. Basic flow fields like bi-directional shear and out-of-plane vortices have been generated electrokinetically in microchannel liquid flow using various surface-charge patterns. In-plane vortex flows present a higher challenge since positive and negative charge regions on the same surface are required. Utilizing a newly-developed polymer-coating technology, the fabrication and characterization of microchannel devices with a variety of charge patterns are reported. Pairs of in-plane counter-rotating vortices or serpentine-like vortical motion have been observed depending on the absence or presence of a mean flow. The experimental results have been found to be consistent with CFD computations using a commercial code.

Original languageEnglish (US)
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.
Pages651-654
Number of pages4
Volume1
ISBN (Print)0780377311, 9780780377318
DOIs
StatePublished - 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

  • Etching
  • Fabrication
  • Fluid flow
  • Glass
  • Mechanical engineering
  • Microchannel
  • Polymer films
  • Silicon compounds
  • Solids
  • Surface treatment

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Hau, W. L. W., Lee, L. M., Lee, Y. K., Wong, M., & Zohar, Y. (2003). Experimental investigation of electrokinetically generated in-plane vorticity in a microchannel. In TRANSDUCERS 2003 - 12th International Conference on Solid-State Sensors, Actuators and Microsystems, Digest of Technical Papers (Vol. 1, pp. 651-654). [1215557] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SENSOR.2003.1215557