한국가시화정보학회:학술대회논문집

The Korean Society of Visualization (한국가시화정보학회)
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Effect of Particle Migration of the Characteristics of Microchannel Flow

  • Kim Y. W. (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Jin S. W. (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim S. W. (Samsung Advanced Institute of Technology) ;
  • Yoo J. Y. (School of Mechanical and Aerospace Engineering, Seoul National University)
  • Published : 2004.12.01
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Abstract

Experimental study was conducted to characterize the flow effect of particle migration in a microchannel which can be used to deliver small amount of liquids, drugs, biological agents and particles in microfluidic devices. Fluorescent particles of $1\{mu}m$ diameter were used to obtain velocity profiles of the fluid in which large particles of $10\{mu}m$ diameter were suspended at different volume fraction of 0.6 and $0.8\%$. Measurements were obtained by using micro-PIV system which contains a Nd:YAG laser with a light of 532-nm wavelength, an inverted epi-fluorescent microscope and a cooled CCD camera to record particle images. The volume fraction of $\phi$ and the particle Reynolds number $Re_p$Rep were used as a parameter to assess the influence of the velocity profile of the suspensions. To expect the slip velocity between the particle and fluids, experiments were carried out at low volume fraction. It was shown that the velocity profile was not influenced by Rep but influenced by the volume fraction, which is in similar trend with the previous study.

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