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Description
Title: | Condensation heat flux measurements in ambient conditions on superhydrophobic nanostructured surfaces |
Author(s): | Sotelo, Jesus A |
Advisor(s): | Miljkovic, Nenad |
Department / Program: | Mechanical Sci & Engineering |
Discipline: | Mechanical Engineering |
Degree Granting Institution: | University of Illinois at Urbana-Champaign |
Degree: | M.S. |
Genre: | Thesis |
Subject(s): | Heat flux measurement
Condensation Superhydrophobic |
Abstract: | 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. |
Issue Date: | 2017-04-26 |
Type: | Text |
URI: | http://hdl.handle.net/2142/97780 |
Rights Information: | Copyright 2017 Jesus Alfredo Sotelo |
Date Available in IDEALS: | 2017-08-10 2019-08-11 |
Date Deposited: | 2017-05 |
This item appears in the following Collection(s)
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Dissertations and Theses - Mechanical Science and Engineering
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Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois