한국가시화정보학회지 (Journal of the Korean Society of Visualization)

  • 제22권2호
  • /
  • Pages.63-73
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  • 2024
  • /
  • 1598-8430(pISSN)
  • /
  • 2093-808X(eISSN)
한국가시화정보학회 (The Korean Society of Visualization)
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Taylor-Couette 흐름에서의 항력 감소에 대한 PEO 점탄성 특성의 공간 가시화

Spatial visualization of PEO viscoelastic properties on drag reduction in Taylor-Couette flow

  • 미로젝 미커와이 ;
  • 문혁균 ;
  • 이진기
  • Mikolaj Mrozek (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Hyeokgyun Moon (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Jinkee Lee (School of Mechanical Engineering, Institute of Quantum Biophysics, Sungkyunkwan University)
  • 투고 : 2024.06.20
  • 심사 : 2024.07.15
  • 발행 : 2024.07.31
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초록

The injection of polymer can significantly reduce drag, particularly in the turbulent flow region where the mutual interaction between the polymer and turbulent vortices occurs. In this study, Taylor-Couette flow of PEO-in-water solutions with a rotating inner cylinder was analyzed. Despite the shear-thinning behaviour of PEO-in-water solutions being well-documented, for a given range of shear rates their viscosity remains nearly constant. By varying the polymer concentration, we analyzed the torque evolution of different solutions followed by the viscoelasticity effects of the polymer on the interphase transition points. The torque was analyzed using a dimensionless torque scaling method, which allows for the assessment of the fluid's momentum transport capabilities. It was observed that for low concentrations of PEO, the flow behaviour exhibited only minor differences in comparison to that of water, the Newtonian fluid. However, once the PEO concentration exceeded the polymer overlap concentration, the flow behaviour was significantly altered.

키워드

과제정보

This work was support by Basic Science Research Program through the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT & Future Planning (NRF2020R1A2C3010568), the Ministry of Education (NRF2021R1A6A1A03039696), and the Korea Environment Industry & Technology Institute (KEITI) through its Ecological Imitation-based Environmental Pollution Management Technology Development Project, funded by the Korea Ministry of Environment (MOE) (2019002790003).

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