{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/121550"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/121550","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A TWO-PHASE CFD ANALYSIS OF GEYSERING WITH APPLICATIONS TO THERMOSYPHONS AND LOW PRESSURE POOL BOILING","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","abstract_has_math":false,"creators":["Ciccotosto, Bruce Edward"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Nuclear, Plasma, Radiolgc Engr","degree_department":null,"school":null,"contributors":["Brooks, Caleb S","Grunloh, Timothy P","Uddin, Rizwan"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-08","date_published":"2023-08","updated_at":"2026-07-22T22:25:00Z","subjects":["Cfd","Multiphase","Fluid Dynamics","Heat Transfer","Thermosyphons","Heat Pipes"],"languages":["en","eng"],"rights":["Copyright 2023 Bruce Ciccotosto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/121550","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Brooks, Caleb S","Grunloh, Timothy P","Uddin, Rizwan"]},{"key":"dc:creator","label":"Author","values":["Ciccotosto, Bruce Edward"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2023-08","2023-07-21"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Nuclear, Plasma, Radiolgc Engr"]},{"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":["Cfd","Multiphase","Fluid Dynamics","Heat Transfer","Thermosyphons","Heat Pipes"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2023 Bruce Ciccotosto"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/121550"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","The student, Bruce Ciccotosto, accepted the attached license on 2023-07-20 at 11:49.","The student, Bruce Ciccotosto, submitted this Thesis for approval on 2023-07-20 at 12:19.","This Thesis was approved for publication on 2023-07-21 at 07:20.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19739 on 2023-12-04 at 17:03:23","Under certain operating conditions, thermosyphons can experience a sharp periodic increase in pressure of 30% or more known as geysering. This can lead to fatigue or bursting of the pressure vessel giving an immediate loss in cooling capability and a safety concern. The current work presents a computational model for studying the fluid dynamics of geysering within a two phase closed thermosyphon. Phase change is modeled via source terms in the governing equations and the resulting phase motion is compared to experimental data from literature. The model can resolve the fluid motion of both phases during the slug growth, bursting and draining stages with good qualitative agreement. The model also correctly predicts the pressure rising rate during the growth stage, the peak pressure and timescale of peak pressure compared to ensemble average empirical data. The simulation setup, parameter sensitivity, and current limitations of the model are discussed in detail. Future work is needed to resolve the pressure decay after bursting and various recommendations are given."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["A TWO-PHASE CFD ANALYSIS OF GEYSERING WITH APPLICATIONS TO THERMOSYPHONS AND LOW PRESSURE POOL BOILING"]}]}],"canonical_facts":{"dc:contributor":["Brooks, Caleb S","Grunloh, Timothy P","Uddin, Rizwan"],"dc:creator":["Ciccotosto, Bruce Edward"],"dc:date":["2023-08","2023-07-21"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","The student, Bruce Ciccotosto, accepted the attached license on 2023-07-20 at 11:49.","The student, Bruce Ciccotosto, submitted this Thesis for approval on 2023-07-20 at 12:19.","This Thesis was approved for publication on 2023-07-21 at 07:20.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19739 on 2023-12-04 at 17:03:23","Under certain operating conditions, thermosyphons can experience a sharp periodic increase in pressure of 30% or more known as geysering. This can lead to fatigue or bursting of the pressure vessel giving an immediate loss in cooling capability and a safety concern. The current work presents a computational model for studying the fluid dynamics of geysering within a two phase closed thermosyphon. Phase change is modeled via source terms in the governing equations and the resulting phase motion is compared to experimental data from literature. The model can resolve the fluid motion of both phases during the slug growth, bursting and draining stages with good qualitative agreement. The model also correctly predicts the pressure rising rate during the growth stage, the peak pressure and timescale of peak pressure compared to ensemble average empirical data. The simulation setup, parameter sensitivity, and current limitations of the model are discussed in detail. Future work is needed to resolve the pressure decay after bursting and various recommendations are given."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/121550"],"dc:language":["en","eng"],"dc:rights":["Copyright 2023 Bruce Ciccotosto"],"dc:subject":["Cfd","Multiphase","Fluid Dynamics","Heat Transfer","Thermosyphons","Heat Pipes"],"dc:title":["A TWO-PHASE CFD ANALYSIS OF GEYSERING WITH APPLICATIONS TO THERMOSYPHONS AND LOW PRESSURE POOL BOILING"],"dc:type":["text"],"thesis:degree_discipline":["Nuclear, Plasma, Radiolgc Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:00Z"}