Contact line region heat transfer mechanisms for an evaporating interface.pdfVIP

International Journal of Heat and Mass Transfer 95 (2016) 296–306 Contents lists available at ScienceDirect International Journal of Heat and Mass Transfer journal homepage: /locate/ijhmt Contact line region heat transfer mechanisms for an evaporating interface Pruthvik A. Raghupathi, Satish G. Kandlikar ? Department of Mechanical Engineering, Rochester Institute of Technology, 76 Lomb Memorial Drive, Rochester, NY 14623, USA article info Article history: Received 30 September 2015 Received in revised form 16 November 2015 Accepted 16 November 2015 Keywords: Contact line Microlayer Boiling Microconvection Thin ?lms Disjoining pressure abstract Many recent studies have emphasized the signi?cance of contact line region heat transfer in applications such as boiling, thin ?lm evaporation and enhanced heat transfer using wicking structures. Literature on heat transfer in the contact line region have focused on the adsorbed layer and transition region of the contact line. However, the region beyond the thin ?lm region of the contact line plays a signi?cant role in heat transfer and associated phase change at the dynamic interface. In this paper, heat transfer in the adsorbed and transition regions as well as in the macro region is reviewed. The need for studying the microconvective effects for polar liquids because of their broad practical application in boiling is also highlighted. Experimental and analytical works on the contact line region are explored and a comprehensive picture of its physical and heat transfer characteristics is presented. Various optical and thermal measurement techniques employed by researchers to understand evaporation in the contact line region are also reviewed. Finally, the contribution of the various modes of heat transfer within the contact line region during nucleate pool boiling is discussed and future research needs are identi?ed. ? 2015 Elsevier Ltd. All rights reserved. 1. Introduction The contact line or the three-phase contact line is