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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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경사진 고체 표면 위를 내려가는 액적의 미글림 유동

  • 김진호 (한국과학기술연구원 열·유동제어연구센터) ;
  • 김호영 (한국과학기술연구원 열·유동제어연구센터) ;
  • 강병하 (국민대학교 기계·자동차공학부) ;
  • 이재헌 (한양대학교 공과대학 기계공학부)
  • Published : 2001.10.01
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Abstract

A scaling analysis is provided which predicts the sliding velocity of a liquid drop down an inclined surface. The analysis is based on the balance of the gravitational work rate that drives the drop sliding and the resistances by capillary and viscous forces. The capillary resistance is accounted for via the contact angle hysteresis, which is quantified by measuring the critical inclination causing the drop to start sliding. The sliding of the drop is governed by the rate of the viscous dissipation of the Stokes flow. The analysis result in its limit form for small contact angles is consistent with previous results. In the experiments to verify the analysis results, the measured sliding velocity of various liquid drops are shown to obey the predictions made in this study.

Keywords

References

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