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http://dx.doi.org/10.7735/ksmte.2014.23.6.555

Microparticle Separator based on Dean Vortex in Spiral Microchannel  

Byun, Kang Il (Department of Mechatronics Engineering, Kangwon National University)
Kim, Hyung Jin (Department of Mechatronics Engineering, Kangwon National University)
Kim, Byeong Hee (Department of Mechatronics Engineering, Kangwon National University)
Seo, Young Ho (Department of Mechatronics Engineering, Kangwon National University)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.23, no.6, 2014 , pp. 555-560 More about this Journal
Abstract
This paper presents a microparticle separator using a spiral microchannel. A particle separator based on the dean vortex was designed, fabricated, and characterized. Two different spiral microchannels were fabricated. Width and initial radius of rotation in the spiral microchannel were fixed to $300{\mu}m$ and 1.75 mm, respectively. Two different depths of the microchannels were designed at $50{\mu}m$ and $80{\mu}m$. In this experimental study, the equilibrium position of microparticles was monitored by using fluorescent microbeads. In the case of a low dean number (<1.0), lift force and dean drag force were similar, indicating that microbeads were distributed to almost all areas across microchannels. However, in the case of a high dean number (>1.0), dean drag force rather than lift force was dominant, indicating that microbeads moved toward the inner wall of the spiral microchannel.
Keywords
Particle separator; Spiral microchannel; Dean vortex; Centrifugal force;
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