Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Interfacial Phenomena and Heat Transfer
ESCI

ISSN Print: 2169-2785
ISSN Online: 2167-857X

Open Access

Interfacial Phenomena and Heat Transfer

DOI: 10.1615/InterfacPhenomHeatTransfer.2017021340
pages 1-8

INFLUENCE OF THE GEOMETRY OF ASYMMETRICAL ELECTRODE ARRAYS ON THE ALTERNATING CURRENT ELECTRO-OSMOSIS FLOW IN MICROCHANNELS

Ji-Cheng Li
CAS Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Science, Beijing 100049, China
Kai Li
CAS Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Science, Beijing 100049, China
Hai Lin
CAS Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
Yong Yu
CAS Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China

ABSTRACT

The Influence of the geometry of asymmetric electrode arrays on the alternating current (AC) electro-osmosis flow in microchannels were experimentally studied, including the width of the electrodes, the gap between the electrodes, and the gap between the electrode pairs. The results showed that the asymmetry of the wide and narrow electrodes in the electrode pair and the gap between the adjacent electrode pairs in the electrode array are crucial in the actual device design. The optimized global pumping effect of the asymmetric electrode array can be achieved in the case of significant asymmetry in the wide and narrow electrodes in the electrode pair and the narrow gap between the adjacent electrode pairs in the electrode array. Moreover, an interesting phenomenon occurred in the case of the asymmetric electrode array with a gap of 100 μm between the adjacent electrode pairs.