caa a22 4500 463235495 CHVBK 20180405153255.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10404-006-0115-6 doi (NATIONALLICENCE)springer-10.1007/s10404-006-0115-6 Electroosmotic flow in microchannels with prismatic elements [Elektronische Daten] [Yandong Hu, Xiangchun Xuan, Carsten Werner, Dongqing Li] Fundamental understanding of liquid flow through microchannels with 3D prismatic elements is important to the design and operation of lab-on-a-chip devices. In this paper, we studied experimentally and theoretically the electroosmotic flow (EOF) in slit microchannels with rectangular 3D prismatic elements fabricated on the bottom channel wall. The average electroosmotic velocity measured by the current-monitoring technique was found lower than that in a smooth microchannel. This velocity reduction becomes larger in microchannel with larger but less number of the prisms even though the space taken by the prisms are identical. The velocity distribution and streamlines on two typical horizontal planes in the microchannel are measured and visualized by a particle-based technique. These experimental observations are in good agreement with the numerical simulation. The comparison of streamlines near the prisms in the pressure-driven flow with that in the EOF showed that the EOF was more sensitive to the local geometry. Springer-Verlag, 2006 Hu Yandong Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, M5S 3G8, Toronto, ON, Canada aut Xuan Xiangchun Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, M5S 3G8, Toronto, ON, Canada aut Werner Carsten Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, M5S 3G8, Toronto, ON, Canada aut Li Dongqing Department of Mechanical Engineering, Vanderbilt University, 37235-1592, Nashville, TN, USA aut Microfluidics and Nanofluidics Springer-Verlag 3/2(2007-04-01), 151-160 1613-4982 3:2<151 2007 3 10404 https://doi.org/10.1007/s10404-006-0115-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10404-006-0115-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hu Yandong Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, M5S 3G8, Toronto, ON, Canada aut NATIONALLICENCE 700 1- Xuan Xiangchun Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, M5S 3G8, Toronto, ON, Canada aut NATIONALLICENCE 700 1- Werner Carsten Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, M5S 3G8, Toronto, ON, Canada aut NATIONALLICENCE 700 1- Li Dongqing Department of Mechanical Engineering, Vanderbilt University, 37235-1592, Nashville, TN, USA aut NATIONALLICENCE 773 0- Microfluidics and Nanofluidics Springer-Verlag 3/2(2007-04-01), 151-160 1613-4982 3:2<151 2007 3 10404 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer