{"id":{"repo_id":"uwo","oai_identifier":"oai:uwo.scholaris.ca:20.500.14721/39504"},"canonical_url":"https://search.dev.ndltd.org/etd/uwo/oai:uwo.scholaris.ca:20.500.14721/39504","repository":{"repo_id":"uwo","name":"Western University","base_url":"https://uwo.scholaris.ca/server/oai/request"},"display":{"title":"Experimental Investigation and Validation of Boiling and Condensation Thermal Resistances in Cylindrical Thermosyphons and Screen-Wick Heat Pipes.","abstract":"Thermosyphons (TS) and heat pipes (HP) are passive two-phase thermal transport devices capable of transferring high heat loads with small temperature differences in thermal management applications. This thesis aims to improve the design-stage prediction of TS and HP performance, where device behaviour must be estimated from known application requirements, geometry, and operating conditions without device-specific experimental characterization. An experimental investigation was conducted to characterize the thermal resistances governing overall device performance. A comprehensive dataset was obtained for 20 copper–water TS and 10 copper–water HP with copper screen-mesh wicks to quantify pool boiling, falling-film boiling, and condensation resistances. Experiments were performed over fill ratios of 0.35–0.75, aspect ratios of 5.3–12.5, inclination angles from 20° to 90°, and evaporator heat-input rates of 6.8–34.0 W. Based on the observed resistance behaviour, resistance-based predictive equations were evaluated against the present experiments and literature datasets, demonstrating good agreement for performance estimation.","abstract_html":"Thermosyphons (TS) and heat pipes (HP) are passive two-phase thermal transport devices capable of transferring high heat loads with small temperature differences in thermal management applications. This thesis aims to improve the design-stage prediction of TS and HP performance, where device behaviour must be estimated from known application requirements, geometry, and operating conditions without device-specific experimental characterization. An experimental investigation was conducted to characterize the thermal resistances governing overall device performance. A comprehensive dataset was obtained for 20 copper–water TS and 10 copper–water HP with copper screen-mesh wicks to quantify pool boiling, falling-film boiling, and condensation resistances. Experiments were performed over fill ratios of 0.35–0.75, aspect ratios of 5.3–12.5, inclination angles from 20° to 90°, and evaporator heat-input rates of 6.8–34.0 W. Based on the observed resistance behaviour, resistance-based predictive equations were evaluated against the present experiments and literature datasets, demonstrating good agreement for performance estimation.","abstract_has_math":false,"creators":["Sanchez, Sebastian"],"institution":"The University of Western Ontario","degree_name":"M Eng Sci","degree_level":null,"degree_discipline":"Mechanical and Materials Engineering","degree_department":null,"school":null,"contributors":[],"advisors":["DeGroot, Christopher","Savory, Eric"],"committee_chairs":[],"committee_members":[],"year":2026,"date_issued":"2026-03-11","date_published":"2026-03-11","updated_at":"2026-07-27T21:56:18Z","subjects":["Thermosyphon","Heat Pipe","Two-phase heat transfer","Thermal resistance","Phase-Change heat transfer","Experimental Investigation","Fill Ratio","Aspect Ratio","Inclination Angle","Wick"],"languages":["en"],"rights":["Attribution 4.0 International"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/20.500.14721/39504","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["DeGroot, Christopher","Savory, Eric"]},{"key":"dc:creator","label":"Author","values":["Sanchez, Sebastian"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2026-03-31T19:15:25Z"]},{"key":"dc:date.issued","label":"Date","values":["2026-03-11"]},{"key":"dc:publisher","label":"Institution","values":["The University of Western Ontario"]},{"key":"dc:type","label":"Dc Type","values":["thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical and Materials Engineering"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M Eng Sci"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["The University of Western Ontario"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Thermosyphon","Heat Pipe","Two-phase heat transfer","Thermal resistance","Phase-Change heat transfer","Experimental Investigation","Fill Ratio","Aspect Ratio","Inclination Angle","Wick"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Attribution 4.0 International"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/20.500.14721/39504"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Thermosyphons (TS) and heat pipes (HP) are passive two-phase thermal transport devices capable of transferring high heat loads with small temperature differences in thermal management applications. This thesis aims to improve the design-stage prediction of TS and HP performance, where device behaviour must be estimated from known application requirements, geometry, and operating conditions without device-specific experimental characterization. An experimental investigation was conducted to characterize the thermal resistances governing overall device performance. A comprehensive dataset was obtained for 20 copper–water TS and 10 copper–water HP with copper screen-mesh wicks to quantify pool boiling, falling-film boiling, and condensation resistances. Experiments were performed over fill ratios of 0.35–0.75, aspect ratios of 5.3–12.5, inclination angles from 20° to 90°, and evaporator heat-input rates of 6.8–34.0 W. Based on the observed resistance behaviour, resistance-based predictive equations were evaluated against the present experiments and literature datasets, demonstrating good agreement for performance estimation."]},{"key":"dc:title","label":"Title","values":["Experimental Investigation and Validation of Boiling and Condensation Thermal Resistances in Cylindrical Thermosyphons and Screen-Wick Heat Pipes."]}]}],"canonical_facts":{"dc:contributor.advisor":["DeGroot, Christopher","Savory, Eric"],"dc:creator":["Sanchez, Sebastian"],"dc:date.accessioned":["2026-03-31T19:15:25Z"],"dc:date.issued":["2026-03-11"],"dc:description.abstract":["Thermosyphons (TS) and heat pipes (HP) are passive two-phase thermal transport devices capable of transferring high heat loads with small temperature differences in thermal management applications. This thesis aims to improve the design-stage prediction of TS and HP performance, where device behaviour must be estimated from known application requirements, geometry, and operating conditions without device-specific experimental characterization. An experimental investigation was conducted to characterize the thermal resistances governing overall device performance. A comprehensive dataset was obtained for 20 copper–water TS and 10 copper–water HP with copper screen-mesh wicks to quantify pool boiling, falling-film boiling, and condensation resistances. Experiments were performed over fill ratios of 0.35–0.75, aspect ratios of 5.3–12.5, inclination angles from 20° to 90°, and evaporator heat-input rates of 6.8–34.0 W. Based on the observed resistance behaviour, resistance-based predictive equations were evaluated against the present experiments and literature datasets, demonstrating good agreement for performance estimation."],"dc:identifier.uri":["https://hdl.handle.net/20.500.14721/39504"],"dc:language.iso":["en"],"dc:publisher":["The University of Western Ontario"],"dc:rights":["Attribution 4.0 International"],"dc:subject":["Thermosyphon","Heat Pipe","Two-phase heat transfer","Thermal resistance","Phase-Change heat transfer","Experimental Investigation","Fill Ratio","Aspect Ratio","Inclination Angle","Wick"],"dc:title":["Experimental Investigation and Validation of Boiling and Condensation Thermal Resistances in Cylindrical Thermosyphons and Screen-Wick Heat Pipes."],"dc:type":["thesis"],"thesis:degree_discipline":["Mechanical and Materials Engineering"],"thesis:degree_name":["M Eng Sci"],"thesis:institution_name":["The University of Western Ontario"]},"updated_at":"2026-07-27T21:56:18Z"}