Date of Publication:2012-01-01
Journal:工程热物理学报
Affiliation of Author(s):化工学院
Volume:33
Issue:6
Page Number:1027-1031
ISSN No.:0253-231X
Abstract:Self-assembled monolayers（SAMs） of 1-octadecanethiol[CE3-CH_2)17SH]were
   applied to promote dropwise condensation on copper substrate.At low
   pressure,the temperature distribution of droplet surface and the
   temperature variation of condensation surface during droplet falling off
   were measured using ThermoVisionA40.Major conclusions drawn in this
   study are as follows:The temperature distribution on the condensing
   surface is nonuniform while the temperature distribution of droplet
   surface is convex.The temperature of droplet surface is higher for
   larger condensate droplet.However,the temperature of droplet surface
   decreases with an increase in subcooling at given vapor pressure.The
   temperature of droplet surface rises gradually due to the falling
   behavior of the droplet.Consequently the temperature of the renewed
   location decreases with the surface subcooling increasing and then rises
   back.As the vapor pressure decreases,an increase in the critical surface
   subcooling for condensation results in a higher activated nucleation
   site density in the center of the renewed location where the temperature
   is lower and eventually lead to the nonuniformity of the temperature
   distribution.
Note:新增回溯数据