Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Theoretical and numerical study on the Dean fluid flow-based separation of particles in a curved microchannel

곡선 마이크로 채널 내 Dean 유체 유동 기반 입자 분리에 대한 이론적 및 수치적 연구

  • Changnyeong Heo (Department of Mechanical Engineering, Incheon National University) ;
  • Jae-Sung Kwon (Department of Mechanical Engineering, Incheon National University)
  • Received : 2025.02.02
  • Accepted : 2025.02.25
  • Published : 2025.05.31
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Abstract

Dean fluid flow offers many advantages to the separation of small-sized particles, compared to existing microfluidic techniques. For broad applications in various science and engineering fields, this study theoretically and numerically evaluates the trajectory variation of particles by the Dean fluid flow and based on the evaluations, proposes the strategies to improve the accuracy and precision of the particle separation. First, we derived the theoretical equation of the particle separation distance produced by Dean fluid flow in a curved microchannel and validated it through computational fluid dynamics simulation. Further, a parametric study was conducted to explore key parameters to increase the distance between the separated particles and maintain the uniformity of the separation distance till reaching the channel outlet. The results of this study will make a significant contribution to enhancing the efficiency of particle separation by the Dean fluid flow in curved microchannels.

Keywords

Acknowledgement

이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(No. 2022R1F1A1065369).

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