Advancing liquid front shape control in capillary filling of microchannel via arrangement of microposts for microfluidic biomedical Sensors

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• 作者：Hyung Jin Kim ; Woong Ki Jang ; Byeong Hee Kim…
• 关键词：Capillary filling ; Meniscus of advancing fluid front ; Micropost arrangement ; Biomedical sensor
• 刊名：International Journal of Precision Engineering and Manufacturing
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：17
• 期：1
• 页码：59-63
• 全文大小：565 KB
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• 作者单位：Hyung Jin Kim (1)
  Woong Ki Jang (1)
  Byeong Hee Kim (1)
  Young Ho Seo (1)
  
  1. Department of Mechanical and Mechatronics Engineering, Kangwon National University, 1, Gangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341, South Korea
  
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering
  Materials Science
  
• 出版者：Korean Society for Precision Engineering, in co-publication with Springer Verlag GmbH
• ISSN：2005-4602

文摘

This paper presents the effect of micropost arrangements on the meniscus shape of the advancing liquid front for capillary filling in a microchannel of biomedical diagnostic sensors. Four different arrangements of cylindrical microposts inside microchannels including hexagonal array with smooth sidewall, hexagonal array with rugged sidewall, rectangular array with smooth sidewall, and rectangular array with rugged sidewall were considered. The meniscus shape of the fluid front were estimated by the volume-of-fluid based computational simulation and compared with experimental results. For hexagonal array, overall meniscus shapes of the advancing liquid front were concave form regardless of sidewall shape. On the other hand, capillary filling through rectangular arrangement of microposts occurred as a step-wise movement with maintaining the flat shape of the advancing liquid fronts. Sidewall microposts affected the capillary filling times rather than the meniscus shape of advancing liquid front. The shape of advancing liquid front and capillary filling time could be passively controlled by arrangement of microposts inside microchannel.