Experimental study on capillary flow through polymer microchannel bends for microfluidic applications

S Mukhopadhyay, SS Roy, A Mathur, M Tweedie, JAD McLaughlin

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Microchannel bends of rectangular cross-section were fabricated on polymethylmethacrylate (PMMA) by hot embossing, with a range of channel widths from 55 µm to 400 µm. The capillary movement of the interface between air and dyed water through the microchannels was recorded and analysed. The microfluidic flow behaviour as a function of the channel aspect ratio was studied. The evaluated Reynolds number was always less than 1.0 in each channel of every device. The air–water interface velocity in the devices was proportional to the channel aspect ratio. The air–water interface velocity shows a prominent increase at 90° separation angle. We observed an increasing trend of the air–water interface velocity with increasing channel aspect ratio. We have studied the separation of 10 µm polystyrene microparticles using a simple microchannel bend structure. We have obtained approximately 100% efficiency for the combined separation and clog-free blocking of 10 µm polystyrene microparticles using the above capillary flow behaviour in a modified microchannel bend structure.
LanguageEnglish
Pages055018
JournalJournal of Micromechanics and Microengineering
Volume20
Issue number5
DOIs
Publication statusPublished - 2010

Fingerprint

Capillary flow
Microchannels
Microfluidics
Polymers
Aspect ratio
Water
Polystyrenes
Air
Polymethyl Methacrylate
Reynolds number

Keywords

  • Soft matter
  • liquids and polymers
  • Fluid dynamics
  • Surfaces
  • interfaces and thin films

Cite this

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title = "Experimental study on capillary flow through polymer microchannel bends for microfluidic applications",
abstract = "Microchannel bends of rectangular cross-section were fabricated on polymethylmethacrylate (PMMA) by hot embossing, with a range of channel widths from 55 µm to 400 µm. The capillary movement of the interface between air and dyed water through the microchannels was recorded and analysed. The microfluidic flow behaviour as a function of the channel aspect ratio was studied. The evaluated Reynolds number was always less than 1.0 in each channel of every device. The air–water interface velocity in the devices was proportional to the channel aspect ratio. The air–water interface velocity shows a prominent increase at 90° separation angle. We observed an increasing trend of the air–water interface velocity with increasing channel aspect ratio. We have studied the separation of 10 µm polystyrene microparticles using a simple microchannel bend structure. We have obtained approximately 100{\%} efficiency for the combined separation and clog-free blocking of 10 µm polystyrene microparticles using the above capillary flow behaviour in a modified microchannel bend structure.",
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Experimental study on capillary flow through polymer microchannel bends for microfluidic applications. / Mukhopadhyay, S; Roy, SS; Mathur, A; Tweedie, M; McLaughlin, JAD.

In: Journal of Micromechanics and Microengineering, Vol. 20, No. 5, 2010, p. 055018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Experimental study on capillary flow through polymer microchannel bends for microfluidic applications

AU - Mukhopadhyay, S

AU - Roy, SS

AU - Mathur, A

AU - Tweedie, M

AU - McLaughlin, JAD

PY - 2010

Y1 - 2010

N2 - Microchannel bends of rectangular cross-section were fabricated on polymethylmethacrylate (PMMA) by hot embossing, with a range of channel widths from 55 µm to 400 µm. The capillary movement of the interface between air and dyed water through the microchannels was recorded and analysed. The microfluidic flow behaviour as a function of the channel aspect ratio was studied. The evaluated Reynolds number was always less than 1.0 in each channel of every device. The air–water interface velocity in the devices was proportional to the channel aspect ratio. The air–water interface velocity shows a prominent increase at 90° separation angle. We observed an increasing trend of the air–water interface velocity with increasing channel aspect ratio. We have studied the separation of 10 µm polystyrene microparticles using a simple microchannel bend structure. We have obtained approximately 100% efficiency for the combined separation and clog-free blocking of 10 µm polystyrene microparticles using the above capillary flow behaviour in a modified microchannel bend structure.

AB - Microchannel bends of rectangular cross-section were fabricated on polymethylmethacrylate (PMMA) by hot embossing, with a range of channel widths from 55 µm to 400 µm. The capillary movement of the interface between air and dyed water through the microchannels was recorded and analysed. The microfluidic flow behaviour as a function of the channel aspect ratio was studied. The evaluated Reynolds number was always less than 1.0 in each channel of every device. The air–water interface velocity in the devices was proportional to the channel aspect ratio. The air–water interface velocity shows a prominent increase at 90° separation angle. We observed an increasing trend of the air–water interface velocity with increasing channel aspect ratio. We have studied the separation of 10 µm polystyrene microparticles using a simple microchannel bend structure. We have obtained approximately 100% efficiency for the combined separation and clog-free blocking of 10 µm polystyrene microparticles using the above capillary flow behaviour in a modified microchannel bend structure.

KW - Soft matter

KW - liquids and polymers

KW - Fluid dynamics

KW - Surfaces

KW - interfaces and thin films

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DO - 10.1088/0960-1317/20/5/055018

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SP - 055018

JO - Journal of Micromechanics and Microengineering

T2 - Journal of Micromechanics and Microengineering

JF - Journal of Micromechanics and Microengineering

SN - 0960-1317

IS - 5

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