{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/130199"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/130199","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Computational modeling of test articles in the PlasmatronX inductively coupled plasma facility","abstract":"Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01","abstract_html":"Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01","abstract_has_math":false,"creators":["Singh, Abhyudaya"],"institution":"University of Illinois Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["Panesi, Marco"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-07-18","date_published":"2025-07-18","updated_at":"2026-07-22T22:25:06Z","subjects":["Hypersonics","Computational Fluid Dynamics","Plasma","Validation"],"languages":["en","eng"],"rights":["Copyright 2025 Abhyudaya Singh"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/130199","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Panesi, Marco"]},{"key":"dc:creator","label":"Author","values":["Singh, Abhyudaya"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-07-18","2025-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"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 Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Hypersonics","Computational Fluid Dynamics","Plasma","Validation"]}]},{"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 2025 Abhyudaya Singh"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/130199"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01","The student, Abhyudaya Singh, accepted the attached license on 2025-07-17 at 16:03.","The student, Abhyudaya Singh, submitted this Thesis for approval on 2025-07-17 at 16:15.","This Thesis was approved for publication on 2025-07-18 at 14:44.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22605 on 2025-10-25 at 15:54:13","This thesis presents a detailed numerical investigation of plasma–material interactions under non-local thermodynamic equilibrium (NLTE) conditions, using the PlasmatronX inductively coupled plasma (ICP) facility at the University of Illinois Urbana-Champaign as the reference testbed. The study is motivated by the need for accurate prediction of surface heat flux and species behavior in high-enthalpy environments relevant to atmospheric reentry and thermal protection system (TPS) design. A multi-physics simulation framework was employed, coupling a finite-volume NLTE flow solver (HEGEL), a finite-element electromagnetic solver (FLUX), and a detailed thermochemical and transport property library (PLATO). The framework accounts for multi-temperature thermochemistry, electromagnetic power deposition, and finite-rate gas–surface interactions. Three complementary studies were performed. First, axisymmetric NLTE simulations of a calorimetric probe (isoQ30) were conducted across varying RF(Radio Frequency) power and chamber pressures. A stagnation-line boundary layer formulation was used to estimate wall catalytic activity, and the computed heat fluxes and nozzle exit enthalpies showed strong agreement with experimental measurements. Second, simulations at 55~kW and 200~mbar were validated against TALIF-based profiles of temperature and atomic species, demonstrating accurate reproduction of experimental trends. Third, two-dimensional and three-dimensional simulations over a graphite wedge test article were carried out, incorporating finite-rate gas–surface reactions. These analyses revealed significant production of carbonaceous species and highlighted the role of lateral spreading, vortex roll-up, and compositional mixing in shaping the heat flux distribution. The obtained results underscore the importance of detailed surface chemistry modeling, boundary layer resolution, and multi-dimensional flow effects in the accurate prediction of plasma–surface interactions. The simulation framework developed in this work offers a robust foundation for future experimental validation, coupling with material response models, and the design of advanced TPS configurations for reentry applications."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Computational modeling of test articles in the PlasmatronX inductively coupled plasma facility"]}]}],"canonical_facts":{"dc:contributor":["Panesi, Marco"],"dc:creator":["Singh, Abhyudaya"],"dc:date":["2025-07-18","2025-08"],"dc:description":["Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01","The student, Abhyudaya Singh, accepted the attached license on 2025-07-17 at 16:03.","The student, Abhyudaya Singh, submitted this Thesis for approval on 2025-07-17 at 16:15.","This Thesis was approved for publication on 2025-07-18 at 14:44.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22605 on 2025-10-25 at 15:54:13","This thesis presents a detailed numerical investigation of plasma–material interactions under non-local thermodynamic equilibrium (NLTE) conditions, using the PlasmatronX inductively coupled plasma (ICP) facility at the University of Illinois Urbana-Champaign as the reference testbed. The study is motivated by the need for accurate prediction of surface heat flux and species behavior in high-enthalpy environments relevant to atmospheric reentry and thermal protection system (TPS) design. A multi-physics simulation framework was employed, coupling a finite-volume NLTE flow solver (HEGEL), a finite-element electromagnetic solver (FLUX), and a detailed thermochemical and transport property library (PLATO). The framework accounts for multi-temperature thermochemistry, electromagnetic power deposition, and finite-rate gas–surface interactions. Three complementary studies were performed. First, axisymmetric NLTE simulations of a calorimetric probe (isoQ30) were conducted across varying RF(Radio Frequency) power and chamber pressures. A stagnation-line boundary layer formulation was used to estimate wall catalytic activity, and the computed heat fluxes and nozzle exit enthalpies showed strong agreement with experimental measurements. Second, simulations at 55~kW and 200~mbar were validated against TALIF-based profiles of temperature and atomic species, demonstrating accurate reproduction of experimental trends. Third, two-dimensional and three-dimensional simulations over a graphite wedge test article were carried out, incorporating finite-rate gas–surface reactions. These analyses revealed significant production of carbonaceous species and highlighted the role of lateral spreading, vortex roll-up, and compositional mixing in shaping the heat flux distribution. The obtained results underscore the importance of detailed surface chemistry modeling, boundary layer resolution, and multi-dimensional flow effects in the accurate prediction of plasma–surface interactions. The simulation framework developed in this work offers a robust foundation for future experimental validation, coupling with material response models, and the design of advanced TPS configurations for reentry applications."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/130199"],"dc:language":["en","eng"],"dc:rights":["Copyright 2025 Abhyudaya Singh"],"dc:subject":["Hypersonics","Computational Fluid Dynamics","Plasma","Validation"],"dc:title":["Computational modeling of test articles in the PlasmatronX inductively coupled plasma facility"],"dc:type":["text"],"thesis:degree_discipline":["Aerospace Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:06Z"}