The Proceedings of the Thermal Engineering Conference
Online ISSN : 2424-290X
2016
Session ID : C215
Conference information

Behavior of a bubble growing on a hydrophobic spot under sub-atmospheric pressures
Masayuki YamadaBiao ShenSumitomo HidakaMasamichi KohnoKoji TakahashiYasuyuki Takata
Author information
CONFERENCE PROCEEDINGS FREE ACCESS

Details
Abstract

In the present study, to investigate the mechanism of transition to intermittent boiling, we have conducted a visualization study of pool boiling on biphilic surfaces at subatmospheric pressures. Experiments were conducted on copper surfaces with a single hydrophobic spot at their centers. The hydrophobic spots were made by PTFE spray coating, and their contact angles were 120–130°. Bubble behavior on the spot was captured using a high speed camera (with 1000 fps). Compared to that at atmospheric pressure, considerably different bubble behaviors were observed under sub-atmospheric conditions. It was suggested that dynamics of the three-phase contact line of bubble was closely related with the transition to intermittent boiling.

Content from these authors
© 2016 The Japan Society of Mechanical Engineers
Previous article Next article
feedback
Top