Surface wettability effects in heat and fluid flow

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Effects of surface wettability on liquid-vapor phase change phenomena and single- and two-phase flow in tube have been studied in wide range of contact angles using superhydrophilic (SH) and super-water-repellent (SWR) surfaces. Heat transfer in falling film evaporation on a TiO2-coated SH surface is tremendously enhanced due to very thin stable film. In pool boiling, critical heat flux (CHF) and minimum heat flux (MHF) increase with the decrease in contact angle. Wetting limit temperature of water drop on heated surface increases with the decrease in contact angle. In pool boiling on SWR surface, bubble nucleation and film boiling occur in extremely small superheating. Drag reduction was observed in water flow in tube with SWR coating in laminar flow region, and on the other hand, in two-phase flow pressure drop for the SH wall is smaller than that for the SWR wall.

Original languageEnglish
Title of host publicationProceedings of the 4th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2006
Pages1333-1341
Number of pages9
Volume2006 B
Publication statusPublished - 2006
Event4th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2006 - Limerick, Ireland
Duration: Jun 19 2006Jun 21 2006

Other

Other4th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2006
CountryIreland
CityLimerick
Period6/19/066/21/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'Surface wettability effects in heat and fluid flow'. Together they form a unique fingerprint.

  • Cite this

    Takata, Y. (2006). Surface wettability effects in heat and fluid flow. In Proceedings of the 4th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2006 (Vol. 2006 B, pp. 1333-1341)