2026-09-22T02:36:45Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/97780 2023-07-11 col_2142_5131 col_2142_14787 com_2142_5130 com_2142_9630 com_2142_234

Miljkovic, Nenad Sotelo, Jesus A 2017-08-10T20:33:24Z 2017-08-10T20:33:24Z 2019-08-11T09:15:35Z 2017-04-26 2017-05 Water vapor condensation is a natural phenomenon experienced in everyday life which can be combined with non-wetting surfaces to enhance heat transfer, desalination, anti-icing and self-cleaning. Recently, superhydrophobic coatings have gathered attention with jumping droplets with the potential for self-cleaning applications and spot cooling on high powered applications. With new coatings being used on different materials, a need has developed for heat transfer measurements through these superhydrophobic coatings as typical heat transfer calculations have been known to underestimate the total heat transfer. Here, I propose to measure the heat flux of a superhydrophobic, nanostructured surface without the need for a controlled vacuum environment. By measuring heat flux within an individual droplet and multiple droplets within a surface, we show that it is possible to measure heat flux of a surface without the need for expensive equipment. As a means of validating these results, experiments within a vacuum chamber will be repeated; hence, the author has provided notes regarding the vacuum chamber building process. This work demonstrates the ability for other researchers to know the heat flux density of a newly fabricated surface to perform initial calculations. Further experiments will involve a vacuum chamber in which similar experiments will be run to be able to compare data and see the effect of atmospheric conditions and non-condensable gasses. Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-05-01 The student, Jesus Sotelo, accepted the attached license on 2017-04-25 at 12:13. The student, Jesus Sotelo, submitted this Thesis for approval on 2017-04-25 at 12:20. This Thesis was approved for publication on 2017-04-26 at 18:05. DSpace SAF Submission Ingestion Package generated from Vireo submission #11042 on 2017-08-10 at 15:06:59 Made available in DSpace on 2017-08-10T20:33:24Z (GMT). No. of bitstreams: 2 SOTELO-THESIS-2017.pdf: 1235147 bytes, checksum: 564c52a32ce6c6c2c414ca5914a944e9 (MD5) LICENSE.txt: 4209 bytes, checksum: 3340127d30da8ec8e8035c99446e581d (MD5) Previous issue date: 2017-04-26 Embargo set by: Colleen Fallaw for item 102833 Lift date: 2019-08-10T21:27:21Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 102833 on 2019-08-11T09:15:35Z. application/pdf http://hdl.handle.net/2142/97780 en Copyright 2017 Jesus Alfredo Sotelo Heat flux measurement Condensation Superhydrophobic Condensation heat flux measurements in ambient conditions on superhydrophobic nanostructured surfaces text text Mechanical Sci & Engineering Mechanical Engineering University of Illinois at Urbana-Champaign Thesis M.S.