Xiangchun Xuan and Dongqing Li 2006 J. Micromech. Microeng. 16 62 doi:10.1088/0960-1317/16/1/009
Particle motions in low-Reynolds number pressure-driven flows through converging–diverging microchannels
Xiangchun Xuan and Dongqing Li1
Show affiliationsParticle motions were experimentally studied in low-Reynolds number pressure-driven flows through converging–diverging microchannels. The whole process of particle acceleration and deceleration close to the bottom channel wall through the converging and diverging sections was visualized. We find that the ratio of the particle velocity in the throat to that in the straight channel is decreased when particles move closer to either sidewall. This ratio is, however, insensitive to the particle size. Both phenomena are well explained with the ratio of fluid velocity at the particle centers in the two regions. It is also found that the particle velocity ratio increases when particles move slower, and the underlying reason may need further investigation.
- PACS
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47.15.G- Low-Reynolds-number (creeping) flows
47.61.Fg Flows in micro-electromechanical systems (MEMS) and nano-electromechanical systems (NEMS)
- Subjects
- Dates
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Issue 1 (January 2006)
Received 9 August 2005, in final form 6 November 2005
Published 7 December 2005
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Particle motions in low-Reynolds number pressure-driven flows through converging–diverging microchannels
Xiangchun Xuan and Dongqing Li 2006 J. Micromech. Microeng. 16 62
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