We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Visualization study of flow condensation in hydrophobic microchannels.
- Authors
Chen, Yongping; Shen, Chaoqun; Shi, Mingheng; Peterson, George P.
- Abstract
A visualization study on flow condensation in hydrophobic rectangular silicon microchannels with hydraulic diameter of approximately 150 μm is conducted. Thin Au film with thickness of 200 nm is sputtered on channel surfaces to create a hydrophobic surface with an equilibrium contact angle of approximately 96°. In addition to traditional droplet flow, droplet-annular compound flow, droplet-injection compound flow, and droplet-bubble/slug compound flow are also observed. The results indicate that injection location is postponed, and injection frequency increases with increasing inlet vapor Reynolds number and condensate Weber number. An empirical correlation of the injection location and injection frequency are presented and discussed. In particular, for a larger inlet vapor Reynolds number, the injection flow is closer to the channel outlet and the condensation heat transfer is enhanced. © 2014 American Institute of Chemical Engineers AIChE J, 60: 1182-1192, 2014
- Subjects
HYDROPHOBIC surfaces; AERODYNAMICS; HEAT transfer; FLUID mechanics; FLUID dynamics
- Publication
AIChE Journal, 2014, Vol 60, Issue 3, p1182
- ISSN
0001-1541
- Publication type
Article
- DOI
10.1002/aic.14319