{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/124611"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/124611","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Particle-resolved simulations of immersion freezing with multi-species ice nucleating particles","abstract":"Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01","abstract_html":"Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01","abstract_has_math":false,"creators":["Tang, Wenhan"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Atmospheric Sciences","degree_department":null,"school":null,"contributors":["Riemer, Nicole","Di Girolamo, Larry","West, Matthew"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2024,"date_issued":"2024-05","date_published":"2024-05","updated_at":"2026-07-22T22:25:02Z","subjects":["Ice Nucleation","Immersion Freezing"],"languages":["en","eng"],"rights":["Copyright 2024 Wenhan Tang"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/124611","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Riemer, Nicole","Di Girolamo, Larry","West, Matthew"]},{"key":"dc:creator","label":"Author","values":["Tang, Wenhan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2024-05","2024-05-03"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Atmospheric Sciences"]},{"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":["Ice Nucleation","Immersion Freezing"]}]},{"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 2024 Wenhan Tang"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/124611"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01","The student, Wenhan Tang, accepted the attached license on 2024-05-02 at 16:41.","The student, Wenhan Tang, submitted this Thesis for approval on 2024-05-02 at 16:41.","This Thesis was approved for publication on 2024-05-03 at 08:38.","DSpace SAF Submission Ingestion Package generated from Vireo submission #20767 on 2024-09-16 at 00:45:05","Immersion freezing, initiated by an ice-nucleating particle (INP) in a supercooled aqueous droplet, has been recognized to play an important role in the formation of ice crystals within clouds. The efficiency of the ice nucleation process depends strongly on the chemical composition of the INPs. Furthermore, INPs can exhibit various mixing states, ranging from external mixtures to internal mixtures, with diverse distributions of chemical species across the particle population. Here, we investigate the impact of the aerosol mixing state on immersion freezing using the stochastic particle-resolved aerosol model (PartMC). We have extended PartMC with a time-dependent representation of immersion freezing based on the water activity-based immersion freezing model and generalized the freezing model’s formulation to calculate freezing rates of INPs that contain multiple species. An efficient algorithm, based on the binned tau-leaping method, has been developed to enable PartMC to simulate particle-resolved immersion freezing with enhanced computational speed while maintaining accuracy. We analytically derived the limiting behavior for the fraction of droplets that undergo immersion freezing when the INPs are internally mixed compared to externally mixed. The impact on the presence of different species on the frozen droplet fraction is explored through simulation. Our findings indicate distinctly different immersion freezing rates when considering internal and external particle mixtures, which is exacerbated when species with different freezing efficiencies are present."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Particle-resolved simulations of immersion freezing with multi-species ice nucleating particles"]}]}],"canonical_facts":{"dc:contributor":["Riemer, Nicole","Di Girolamo, Larry","West, Matthew"],"dc:creator":["Tang, Wenhan"],"dc:date":["2024-05","2024-05-03"],"dc:description":["Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01","The student, Wenhan Tang, accepted the attached license on 2024-05-02 at 16:41.","The student, Wenhan Tang, submitted this Thesis for approval on 2024-05-02 at 16:41.","This Thesis was approved for publication on 2024-05-03 at 08:38.","DSpace SAF Submission Ingestion Package generated from Vireo submission #20767 on 2024-09-16 at 00:45:05","Immersion freezing, initiated by an ice-nucleating particle (INP) in a supercooled aqueous droplet, has been recognized to play an important role in the formation of ice crystals within clouds. The efficiency of the ice nucleation process depends strongly on the chemical composition of the INPs. Furthermore, INPs can exhibit various mixing states, ranging from external mixtures to internal mixtures, with diverse distributions of chemical species across the particle population. Here, we investigate the impact of the aerosol mixing state on immersion freezing using the stochastic particle-resolved aerosol model (PartMC). We have extended PartMC with a time-dependent representation of immersion freezing based on the water activity-based immersion freezing model and generalized the freezing model’s formulation to calculate freezing rates of INPs that contain multiple species. An efficient algorithm, based on the binned tau-leaping method, has been developed to enable PartMC to simulate particle-resolved immersion freezing with enhanced computational speed while maintaining accuracy. We analytically derived the limiting behavior for the fraction of droplets that undergo immersion freezing when the INPs are internally mixed compared to externally mixed. The impact on the presence of different species on the frozen droplet fraction is explored through simulation. Our findings indicate distinctly different immersion freezing rates when considering internal and external particle mixtures, which is exacerbated when species with different freezing efficiencies are present."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/124611"],"dc:language":["en","eng"],"dc:rights":["Copyright 2024 Wenhan Tang"],"dc:subject":["Ice Nucleation","Immersion Freezing"],"dc:title":["Particle-resolved simulations of immersion freezing with multi-species ice nucleating particles"],"dc:type":["text"],"thesis:degree_discipline":["Atmospheric Sciences"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:02Z"}