A two-phase flow in mini-channels is consist with various flow regimes (such as bubble slug, annular, churn flow) according to gas and liquid phase flow rates. A previous researches revealed that in a case of slug flow in hydrophobic mini-channels, gas and liquid phase are perfectly separated by interfaces and triple contact line. In this study, the single dry slug flow experiments in circular mini-channel (D = 1.018 mm) are conducted to observe interfacial break-up phenomena in high capillary number range (Ca < 0.02). The slug is consist with D.I. water or D.I. water-ethanol binary mixtures (5% and 10%, mole fraction). On the base of previous researches, we calculate the pressure drop at moving triple contact line. In an addition, a single dry slug flow is visualized by using high-speed camera. Through the experiment, three regimes of pressure drop are observed; steady, loss, separation. As a result, criteria between steady and loss regimes is closely related to capillary number, and criteria between loss and separation regimes is related to surface tension.

ABSTRACT
1. 서 론
2. 실 험
    2.1 실험 장치
    2.2 실험 수행방법
    2.3 실험 결과 정리
3. 실험 결과 및 고찰
4. 결 론
References

• 박수청(POSTECH Department of Mechanical Engineering) | Su Cheong Park
• 서경덕(Wonkwang University, Department of Mechanical Engineering) | Kyoung Duck Seo Corresponding Author
• 유동인(Pukyong National University, Department of Mechanical Design Engineering) | Dong In Yu Corresponding Author