Surface wettability effects on critical heat flux of boiling heat transfer using nanoparticle coatings
Journal
International Journal of Heat and Mass Transfer
Journal Volume
55
Journal Issue
13-14
Pages
3713-3719
Date Issued
2012
Author(s)
Abstract
This study investigates the effects of surface wettability on pool boiling heat transfer. Nano-silica particle coatings were used to vary the wettability of the copper surface from superhydrophilic to superhydrophobic by modifying surface topography and chemistry. Experimental results show that critical heat flux (CHF) values are higher in the hydrophilic region. Conversely, CHF values are lower in the hydrophobic region. The experimental CHF data of the modified surface do not fit the classical models. Therefore, this study proposes a simple model to build the nexus between the surface wettability and the growth of bubbles on the heating surface. © 2012 Elsevier Ltd. All rights reserved.
SDGs
Type
journal article