Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Numerical Analysis of the Behavior of the Free Surface in a Moving Cup

이송되는 컵 내부의 자유 표면의 거동 특성에 대한 수치해석

  • Kim, Yun-Sun (Department of Mechanical Engineering, Graduate school, Kyung-hee University) ;
  • Hong, Tae-Hyub (Department of Mechanical Engineering, Graduate school, Kyung-hee University) ;
  • Kim, Chang-Nyung (Department of Mechanical Engineering, Kvung-hee University(Industrial Liaison Research Institute)) ;
  • Rhim, Sung-Soo (Department of Mechanical Engineering, Kvung-hee University(Industrial Liaison Research Institute))
  • 김윤선 (경희대학교 대학원 기계공학과) ;
  • 홍태협 (경희대학교 대학원 기계공학과) ;
  • 김창녕 (경희대학교 기계공학과(산학협력기술연구원)) ;
  • 임성수 (경희대학교 기계공학과(산학협력기술연구원))
  • Published : 2009.07.10
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Abstract

A manipulator is operated for the motion of mechanical hands or arms. When a cup including liquid inside is shifted by a manipulator, it is important to know how a free surface of the liquid moves. In this study, non dimensional parameters have been found that affect the rise of the free surface in a cup moving with constant acceleration. The non-dimensional parameters are the dimensionless time, the ratio of inertia effect to viscous effect (the Reynolds number), the aspect ratio of the liquid inside the cup and the acceleration ratio (the Froude number). Through this study, the height of the free surface rise in a cup has been predicted and the detailed velocities in the liquid have been examined. Generally, the maximum rise of the free surface is dependent on the Reynolds number and Froude number strongly, but on the aspect ratio weakly. However, the influence of the aspect ratio on the maximum rise of the free surface is not negligible in the range of 10 < Re < 100.

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References

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