Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Investigation for the Fluid Motion in Closed End Capillaries

닫힌 모세관에서 유체 이송에 관한 연구

  • Lim, Hosub (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Lim, Seong Jin (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Lee, Jinkee (School of Mechanical Engineering, Sungkyunkwan University)
  • 임호섭 (성균관대학교 기계공학과) ;
  • 임성진 (성균관대학교 기계공학과) ;
  • 이진기 (성균관대학교 기계공학과)
  • Received : 2014.07.26
  • Accepted : 2014.08.26
  • Published : 2014.08.31
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Abstract

Although many studies have been done on an open-end capillary, the invasion into a closed end capillary is still novel in its investigation. In this research we have explored the fluid invasion in closed-end capillaries where the shape of the meniscus and the height of invasion were accompanied by gas compression inside the capillary. Theoretically, the one dimensional momentum balance equation shows the fluid oscillation. In the experiments, we have found the different phenomena, either the fluid oscillation with low frequency or no oscillation. This discrepancy is mostly caused by two factors. First, a continuous decrease of the advancing contact angle due to decreasing invasion velocity as increasing pressure inside the closed-end capillary reduces the invasion velocities. Second, the high shear stress within the entrance length region was generated by the plug like velocity profile.

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References

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