{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/125598"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/125598","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Analysis of gas-solid multiphase flow systems in extreme flight environments using a one-way coupled DSMC-Lagrangian overlay-based computational framework","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms","abstract_has_math":false,"creators":["Myers, Nathan K."],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["Levin, Deborah A"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2024,"date_issued":"2024-07-16","date_published":"2024-07-16","updated_at":"2026-07-22T22:25:02Z","subjects":["Dilute Multiphase Flow","Rarefied Gas-particulate Flow","Irregular Particle Drag","Dsmc","Lagrangian","One-way Coupled"],"languages":["en","eng"],"rights":["Copyright 2024 Nathaniel K. Myers"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/125598","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Levin, Deborah A"]},{"key":"dc:creator","label":"Author","values":["Myers, Nathan K."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2024-07-16","2024-08"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Aerospace 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":["Dilute Multiphase Flow","Rarefied Gas-particulate Flow","Irregular Particle Drag","Dsmc","Lagrangian","One-way Coupled"]}]},{"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 Nathaniel K. Myers"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/125598"]}]},{"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 2025-02-04 without embargo terms","The student, Nathan Myers, accepted the attached license on 2024-07-11 at 14:21.","The student, Nathan Myers, submitted this Thesis for approval on 2024-07-13 at 12:01.","This Thesis was approved for publication on 2024-07-16 at 11:19.","DSpace SAF Submission Ingestion Package generated from Vireo submission #21026 on 2025-02-04 at 21:04:48","This thesis presents a one-way coupled DSMC-Lagrangian overlay-based computational methodology designed to investigate the dynamics of gas-solid multiphase flow systems characterized by very low particulate mass loading in extreme high-speed, high-altitude flight environments. Utilizing the Direct Simulation Monte Carlo method to generate accurate steady-state gas flow fields, this study explores three canonical hypersonic flow systems. First, we focus on the dynamics of particulates within shock-dominated flow systems over axisymmetric sharp cone and sphere-cone geometries. In the flows over the sharp cone we analyze particulate behavior in systems characterized by attached oblique shocks, finding that the presence of a strong shear layer is primarily responsible for dictating the behavior of small particulates. This layer divides particulates by generating oppositely directed radial aerodynamic forces on either side of the layer. For small particulates within its vicinity, the shear layer acts to focus particulates into highly concentrated regions on the top or bottom of the layer depending on particulate diameter. For flows over the sphere-cone, we describe the particulate interaction with the detached bow shocks, ultimately revealing the formation of dust-free zones for small particulate diameters. As particulate diameter and flight altitude increase, the characteristics of the solid phase flow evolve, leading to the emergence of distinctive features such as highly-concentrated bands of particulates or regions completely void of particulates. This investigation then extends to flows over an axisymmetric double-cone geometry, focusing on the dynamics of particulates within vortex-dominated systems where particulate-inertia-driven interactions with vortices result in unique particulate-free zones in the vicinity of the primary and secondary vortices. Additionally, this work addresses the importance of using realistic fractal-like particulate shapes and demonstrates that the shape effect tends to decelerate the fractal aggregates and trap them along the boundaries of the primary vortex. This research contributes to a fundamental understanding of gas-solid multiphase flow system dynamics in extreme flight conditions, offering insights relevant to aerospace and aerodynamic applications."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Analysis of gas-solid multiphase flow systems in extreme flight environments using a one-way coupled DSMC-Lagrangian overlay-based computational framework"]}]}],"canonical_facts":{"dc:contributor":["Levin, Deborah A"],"dc:creator":["Myers, Nathan K."],"dc:date":["2024-07-16","2024-08"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms","The student, Nathan Myers, accepted the attached license on 2024-07-11 at 14:21.","The student, Nathan Myers, submitted this Thesis for approval on 2024-07-13 at 12:01.","This Thesis was approved for publication on 2024-07-16 at 11:19.","DSpace SAF Submission Ingestion Package generated from Vireo submission #21026 on 2025-02-04 at 21:04:48","This thesis presents a one-way coupled DSMC-Lagrangian overlay-based computational methodology designed to investigate the dynamics of gas-solid multiphase flow systems characterized by very low particulate mass loading in extreme high-speed, high-altitude flight environments. Utilizing the Direct Simulation Monte Carlo method to generate accurate steady-state gas flow fields, this study explores three canonical hypersonic flow systems. First, we focus on the dynamics of particulates within shock-dominated flow systems over axisymmetric sharp cone and sphere-cone geometries. In the flows over the sharp cone we analyze particulate behavior in systems characterized by attached oblique shocks, finding that the presence of a strong shear layer is primarily responsible for dictating the behavior of small particulates. This layer divides particulates by generating oppositely directed radial aerodynamic forces on either side of the layer. For small particulates within its vicinity, the shear layer acts to focus particulates into highly concentrated regions on the top or bottom of the layer depending on particulate diameter. For flows over the sphere-cone, we describe the particulate interaction with the detached bow shocks, ultimately revealing the formation of dust-free zones for small particulate diameters. As particulate diameter and flight altitude increase, the characteristics of the solid phase flow evolve, leading to the emergence of distinctive features such as highly-concentrated bands of particulates or regions completely void of particulates. This investigation then extends to flows over an axisymmetric double-cone geometry, focusing on the dynamics of particulates within vortex-dominated systems where particulate-inertia-driven interactions with vortices result in unique particulate-free zones in the vicinity of the primary and secondary vortices. Additionally, this work addresses the importance of using realistic fractal-like particulate shapes and demonstrates that the shape effect tends to decelerate the fractal aggregates and trap them along the boundaries of the primary vortex. This research contributes to a fundamental understanding of gas-solid multiphase flow system dynamics in extreme flight conditions, offering insights relevant to aerospace and aerodynamic applications."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/125598"],"dc:language":["en","eng"],"dc:rights":["Copyright 2024 Nathaniel K. Myers"],"dc:subject":["Dilute Multiphase Flow","Rarefied Gas-particulate Flow","Irregular Particle Drag","Dsmc","Lagrangian","One-way Coupled"],"dc:title":["Analysis of gas-solid multiphase flow systems in extreme flight environments using a one-way coupled DSMC-Lagrangian overlay-based computational framework"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Aerospace Engineering"],"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"}