In microchannel flow, gas-liquid interface behavior will be important for developing a wide range of microfluidic applications, especially in micro reactors. In this paper, we discuss some topics related to capillary action and two-phase fluid behavior in a microchannel. One of the topics is interface motion in the flow driven only by capillary action. We examined circular and rectangular microchannel with diameter of 50 μm and 100 μm × 67 μm, respectively. For the circular channel, experiments well agreed with the previous theory in the case of ethyl alcohol as the test liquid. The effects of inner surface condition are found to be critical for interface motion on a microscopic scale. We have extended our theory to a rectangular microchannel. We obtained the same formula of relation between non-dimensional time and interface position as that of the circular channel. We compared predictions with experimental results of a PDMS microchannel. They agreed qualitatively, but not quantitatively. The difference was considered to be caused by contact angle estimation.
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ASME 2003 1st International Conference on Microchannels and Minichannels
April 24–25, 2003
Rochester, New York, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-3667-3
PROCEEDINGS PAPER
Interface Motion Driven by Capillary Action in Microchannel Available to Purchase
Naoki Ichikawa,
Naoki Ichikawa
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
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Ryutaro Maeda
Ryutaro Maeda
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
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Naoki Ichikawa
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
Ryutaro Maeda
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
Paper No:
ICMM2003-1061, pp. 499-506; 8 pages
Published Online:
February 24, 2009
Citation
Ichikawa, N, & Maeda, R. "Interface Motion Driven by Capillary Action in Microchannel." Proceedings of the ASME 2003 1st International Conference on Microchannels and Minichannels. 1st International Conference on Microchannels and Minichannels. Rochester, New York, USA. April 24–25, 2003. pp. 499-506. ASME. https://doi.org/10.1115/ICMM2003-1061
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