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KCI 등재

미니채널 내 물-에탄올 혼합물로 구성된 단일 액체 슬러그 계면 깨짐 현상에 대한 실험적 연구

An Experimental Study of Interfacial Break-up of a Water-Ethanol Mixture Slug in a Hydrophobic Mini-Channel

한국기계기술학회지
약어 : KSMT
2019 vol.21, no.6, pp.1118 - 1124
DOI : 10.17958/ksmt.21.6.201912.1118
발행기관 : 한국기계기술학회
연구분야 : 기계공학
Copyright © 한국기계기술학회
박수청 1 ,  서경덕 2 ,  유동인 3

1포항공과대학교

2원광대학교

3부경대학교

인용한 논문 수 :   -  
134 회 열람

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.

Slug flow(슬러그류), Pressure drop(압력강하), Interface break(계면 깨짐), Hydrophobic(소수성), Mini-channel(미니채널)

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