{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/101230"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/101230","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Dropwise condensation on hydrophilic surfaces","abstract":"Droplet nucleation and condensation are ubiquitous phenomena in nature and industry. Over the past century, research has shown dropwise condensation heat transfer on non-wetting surfaces to be an order of magnitude higher than filmwise condensation heat transfer on wetting substrates. However, the necessity for non-wetting to achieve dropwise condensation is unclear. Here we report stable dropwise condensation on a smooth, solid, hydrophilic surface (𝜃a = 38°) having low contact angle hysteresis (< 3°). We show that the distribution of droplet sizes for coalescing droplets agrees well with the classical distribution on hydrophobic surfaces. Our findings demonstrate that achieving stable dropwise condensation is not governed by surface intrinsic wettability, as assumed for the past eight decades, but rather it is dictated by contact angle hysteresis.","abstract_html":"Droplet nucleation and condensation are ubiquitous phenomena in nature and industry. Over the past century, research has shown dropwise condensation heat transfer on non-wetting surfaces to be an order of magnitude higher than filmwise condensation heat transfer on wetting substrates. However, the necessity for non-wetting to achieve dropwise condensation is unclear. Here we report stable dropwise condensation on a smooth, solid, hydrophilic surface (𝜃a = 38°) having low contact angle hysteresis (&lt; 3°). We show that the distribution of droplet sizes for coalescing droplets agrees well with the classical distribution on hydrophobic surfaces. Our findings demonstrate that achieving stable dropwise condensation is not governed by surface intrinsic wettability, as assumed for the past eight decades, but rather it is dictated by contact angle hysteresis.","abstract_has_math":false,"creators":["Wu, Alex"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Miljkovic, Nenad"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-09-04T20:41:57Z","date_published":"2018-09-04T20:41:57Z","updated_at":"2026-07-22T22:24:38Z","subjects":["hydrophobic","hydrophilic","condensation, hysteresis","heat transfer","contact angle","PEGylated"],"languages":["en"],"rights":["This thesis is compiled from a previous work by the author. Copyright 2018 American Physical Society."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/101230","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Miljkovic, Nenad"]},{"key":"dc:creator","label":"Author","values":["Wu, Alex"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-09-04T20:41:57Z","2020-09-05T09:15:20Z","2018-04-26","2018-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["hydrophobic","hydrophilic","condensation, hysteresis","heat transfer","contact angle","PEGylated"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["This thesis is compiled from a previous work by the author. 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Our findings demonstrate that achieving stable dropwise condensation is not governed by surface intrinsic wettability, as assumed for the past eight decades, but rather it is dictated by contact angle hysteresis.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01","The student, Alex Wu, accepted the attached license on 2018-04-25 at 19:37.","The student, Alex Wu, submitted this Thesis for approval on 2018-04-25 at 19:51.","This Thesis was approved for publication on 2018-04-26 at 13:30.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12507 on 2018-08-31 at 17:21:33","Made available in DSpace on 2018-09-04T20:41:57Z (GMT). No. of bitstreams: 2 WU-THESIS-2018.pdf: 735875 bytes, checksum: bef419127a1db249d16f29a6fd294de5 (MD5) LICENSE.txt: 4204 bytes, checksum: d7c4fc8ebac6f5ed27ed25d215e7ad4e (MD5) Previous issue date: 2018-04-26","Embargo set by: Seth Robbins for item 107315 Lift date: 2020-09-04T20:42:08Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only Restriction Lifted for Item 107315 on 2020-09-05T09:15:20Z."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Dropwise condensation on hydrophilic surfaces"]}]}],"canonical_facts":{"dc:contributor":["Miljkovic, Nenad"],"dc:creator":["Wu, Alex"],"dc:date":["2018-09-04T20:41:57Z","2020-09-05T09:15:20Z","2018-04-26","2018-05"],"dc:description":["Droplet nucleation and condensation are ubiquitous phenomena in nature and industry. Over the past century, research has shown dropwise condensation heat transfer on non-wetting surfaces to be an order of magnitude higher than filmwise condensation heat transfer on wetting substrates. However, the necessity for non-wetting to achieve dropwise condensation is unclear. Here we report stable dropwise condensation on a smooth, solid, hydrophilic surface (𝜃a = 38°) having low contact angle hysteresis (< 3°). We show that the distribution of droplet sizes for coalescing droplets agrees well with the classical distribution on hydrophobic surfaces. Our findings demonstrate that achieving stable dropwise condensation is not governed by surface intrinsic wettability, as assumed for the past eight decades, but rather it is dictated by contact angle hysteresis.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01","The student, Alex Wu, accepted the attached license on 2018-04-25 at 19:37.","The student, Alex Wu, submitted this Thesis for approval on 2018-04-25 at 19:51.","This Thesis was approved for publication on 2018-04-26 at 13:30.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12507 on 2018-08-31 at 17:21:33","Made available in DSpace on 2018-09-04T20:41:57Z (GMT). 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Copyright 2018 American Physical Society."],"dc:subject":["hydrophobic","hydrophilic","condensation, hysteresis","heat transfer","contact angle","PEGylated"],"dc:title":["Dropwise condensation on hydrophilic surfaces"],"dc:type":["text"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:38Z"}