Authors: DaYong Yang Ying Liu
Publish Date: 2009/08/01
Volume: 52, Issue: 8, Pages: 2460-2465
Abstract
Electroosmotic flow EOF is a promising way for driving and mixing fluids in microfluidics For the parallelplate microchannel with the hydrophobic surface this paper solved the governing equations using the finite element method FEM and the effects of microchannel height electric strength and ionic concentration on EOF were thus investigated The simulation indicates that the transient characteristics of EOF are similar in hydrophobic and hydrophilic microchannels the steady time of EOF is proportional to the square of microchannel height and the scale is microsecond EOF velocity is proportional to the electric strength and independent of the channel height and decreases slowly with the ionic concentration which is lower than that in hydrophilic microchannel due to the presence of slip length in hydrophobic microchannel The results can provide valuable insights into the optimal design of microchannel surfaces to achieve accurate EOF control in hydrophobic microchannel
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