Effects of surface roughness on the flow characteristics in PDMS microchannels

Young Min Kim, Woo Seung Kim, Sang Hoon Lee, Ju Yeoul Baek

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    6 Citations (Scopus)

    Abstract

    Fundamental understanding of liquid flow through microchannels is important to the design and optimization of microfluidic devices. The objective of the current study is to experimentally investigate the effects of surface roughness on the flow characteristics in rectangular PDMS microchannel with a hydraulic diameter ranging from 66.67 to 200 μm. The experimental results are compared with the predictions from the conventional laminar flow theory. A significant difference between the experimental data and the theoretical predictions is found. Experimental results indicate that the pressure gradient and flow friction in microchannels are higher than those from the conventional laminar flow theory. This may be attributed to the fact that there exists the effect of surface roughness of the microchannels. The present results with a surface roughness model are compared with the experimental results to examine the validity of the model. It is found that there is a good agreement between the experimental data and the numerical predictions with a surface roughness model.

    Original languageEnglish
    Title of host publication2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology
    Pages292-295
    Number of pages4
    DOIs
    Publication statusPublished - 2005
    Event2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology - Oahu, HI, United States
    Duration: 2005 May 122005 May 15

    Publication series

    Name2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology
    Volume2005

    Other

    Other2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology
    Country/TerritoryUnited States
    CityOahu, HI
    Period05/5/1205/5/15

    ASJC Scopus subject areas

    • General Engineering

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