{"id":{"repo_id":"toronto-retro","oai_identifier":"oai:utoronto.scholaris.ca:1807/94293"},"canonical_url":"https://search.dev.ndltd.org/etd/toronto-retro/oai:utoronto.scholaris.ca:1807/94293","repository":{"repo_id":"toronto-retro","name":"University of Toronto","base_url":"https://utoronto.scholaris.ca/server/oai/request"},"display":{"title":"A Parallel Solution-Adaptive Method for Turbulent Non-Premixed Combusting Flows","abstract":"A parallel adaptive mesh refinement (AMR) algorithm is proposed and applied to the predictions of turbulent non-premixed compressible combusting flows for both two and three space dimensions. The parallel solution-adaptive algorithm solves the system of partial-differential equations governing turbulent compressible flows of reactive thermally perfect gaseous mixtures using a fully coupled finite-volume formulation on body-fitted multi-block quadrilateral meshes and hexahedral meshes. The compressible formulation adopted herein can readily accommodate large density variations and thermo-acoustic phenomena. A preconditioned multigrid algorithm is used to obtain the solution on highly stretched meshes in a more efficient manner. A flexible block-based hierarchical data structure is used to maintain the connectivity of the solution blocks in the multi-block mesh and to facilitate automatic solution-directed mesh adaptation according to physics-based refinement criteria. For calculations of near-wall turbulence, an automatic near-wall treatment readily accommodates situations during adaptive mesh refinement where the mesh resolution may not be sufficient for directly calculating near-wall turbulence using the low-Reynolds-number formulation. Numerical results for turbulent diffusion flames, including cold- and hot-flow predictions for a bluff-body burner, are described and compared to available experimental data. The numerical results demonstrate the validity and potential of the parallel AMR approach for predicting fine-scale features of complex turbulent non-premixed flames.","abstract_html":"A parallel adaptive mesh refinement (AMR) algorithm is proposed and applied to the predictions of turbulent non-premixed compressible combusting flows for both two and three space dimensions. The parallel solution-adaptive algorithm solves the system of partial-differential equations governing turbulent compressible flows of reactive thermally perfect gaseous mixtures using a fully coupled finite-volume formulation on body-fitted multi-block quadrilateral meshes and hexahedral meshes. The compressible formulation adopted herein can readily accommodate large density variations and thermo-acoustic phenomena. A preconditioned multigrid algorithm is used to obtain the solution on highly stretched meshes in a more efficient manner. A flexible block-based hierarchical data structure is used to maintain the connectivity of the solution blocks in the multi-block mesh and to facilitate automatic solution-directed mesh adaptation according to physics-based refinement criteria. For calculations of near-wall turbulence, an automatic near-wall treatment readily accommodates situations during adaptive mesh refinement where the mesh resolution may not be sufficient for directly calculating near-wall turbulence using the low-Reynolds-number formulation. Numerical results for turbulent diffusion flames, including cold- and hot-flow predictions for a bluff-body burner, are described and compared to available experimental data. The numerical results demonstrate the validity and potential of the parallel AMR approach for predicting fine-scale features of complex turbulent non-premixed flames.","abstract_has_math":false,"creators":["Gao, Xinfeng"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Aerospace Science and Engineering","school":null,"contributors":[],"advisors":["Groth, Clinton"],"committee_chairs":[],"committee_members":[],"year":2008,"date_issued":"2008-11","date_published":"2008-11","updated_at":"2026-07-27T21:27:56Z","subjects":["Parallel Adaptive Mesh Refinement","Turbulent Combusting Flows","Turbulent Diffusion Flames","Numerical Algorithm"],"languages":["en_ca"],"rights":["Attribution-NonCommercial-NoDerivs 2.5 Canada"],"rights_urls":["http://creativecommons.org/licenses/by-nc-nd/2.5/ca/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1807/94293","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Groth, Clinton"]},{"key":"dc:contributor.department","label":"Department","values":["Aerospace Science and Engineering"]},{"key":"dc:creator","label":"Author","values":["Gao, Xinfeng"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2008-11"]},{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-04-03T17:57:46Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["NO_RESTRICTION","2019-04-03T17:57:46Z"]},{"key":"dc:date.issued","label":"Date","values":["2008-11"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Parallel Adaptive Mesh Refinement","Turbulent Combusting Flows","Turbulent Diffusion Flames","Numerical Algorithm"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_ca"]},{"key":"dc:rights","label":"Dc Rights","values":["Attribution-NonCommercial-NoDerivs 2.5 Canada"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://creativecommons.org/licenses/by-nc-nd/2.5/ca/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1807/94293"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A parallel adaptive mesh refinement (AMR) algorithm is proposed and applied to the predictions of turbulent non-premixed compressible combusting flows for both two and three space dimensions. The parallel solution-adaptive algorithm solves the system of partial-differential equations governing turbulent compressible flows of reactive thermally perfect gaseous mixtures using a fully coupled finite-volume formulation on body-fitted multi-block quadrilateral meshes and hexahedral meshes. The compressible formulation adopted herein can readily accommodate large density variations and thermo-acoustic phenomena. A preconditioned multigrid algorithm is used to obtain the solution on highly stretched meshes in a more efficient manner. A flexible block-based hierarchical data structure is used to maintain the connectivity of the solution blocks in the multi-block mesh and to facilitate automatic solution-directed mesh adaptation according to physics-based refinement criteria. For calculations of near-wall turbulence, an automatic near-wall treatment readily accommodates situations during adaptive mesh refinement where the mesh resolution may not be sufficient for directly calculating near-wall turbulence using the low-Reynolds-number formulation. Numerical results for turbulent diffusion flames, including cold- and hot-flow predictions for a bluff-body burner, are described and compared to available experimental data. The numerical results demonstrate the validity and potential of the parallel AMR approach for predicting fine-scale features of complex turbulent non-premixed flames."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["PhD"]},{"key":"dc:title","label":"Title","values":["A Parallel Solution-Adaptive Method for Turbulent Non-Premixed Combusting Flows"]}]}],"canonical_facts":{"dc:contributor.advisor":["Groth, Clinton"],"dc:contributor.department":["Aerospace Science and Engineering"],"dc:creator":["Gao, Xinfeng"],"dc:date":["2008-11"],"dc:date.accessioned":["2019-04-03T17:57:46Z"],"dc:date.available":["NO_RESTRICTION","2019-04-03T17:57:46Z"],"dc:date.issued":["2008-11"],"dc:description.abstract":["A parallel adaptive mesh refinement (AMR) algorithm is proposed and applied to the predictions of turbulent non-premixed compressible combusting flows for both two and three space dimensions. The parallel solution-adaptive algorithm solves the system of partial-differential equations governing turbulent compressible flows of reactive thermally perfect gaseous mixtures using a fully coupled finite-volume formulation on body-fitted multi-block quadrilateral meshes and hexahedral meshes. The compressible formulation adopted herein can readily accommodate large density variations and thermo-acoustic phenomena. A preconditioned multigrid algorithm is used to obtain the solution on highly stretched meshes in a more efficient manner. A flexible block-based hierarchical data structure is used to maintain the connectivity of the solution blocks in the multi-block mesh and to facilitate automatic solution-directed mesh adaptation according to physics-based refinement criteria. For calculations of near-wall turbulence, an automatic near-wall treatment readily accommodates situations during adaptive mesh refinement where the mesh resolution may not be sufficient for directly calculating near-wall turbulence using the low-Reynolds-number formulation. Numerical results for turbulent diffusion flames, including cold- and hot-flow predictions for a bluff-body burner, are described and compared to available experimental data. The numerical results demonstrate the validity and potential of the parallel AMR approach for predicting fine-scale features of complex turbulent non-premixed flames."],"dc:description.degree":["PhD"],"dc:identifier.uri":["http://hdl.handle.net/1807/94293"],"dc:language.iso":["en_ca"],"dc:rights":["Attribution-NonCommercial-NoDerivs 2.5 Canada"],"dc:rights.uri":["http://creativecommons.org/licenses/by-nc-nd/2.5/ca/"],"dc:subject":["Parallel Adaptive Mesh Refinement","Turbulent Combusting Flows","Turbulent Diffusion Flames","Numerical Algorithm"],"dc:title":["A Parallel Solution-Adaptive Method for Turbulent Non-Premixed Combusting Flows"],"dc:type":["Thesis"]},"updated_at":"2026-07-27T21:27:56Z"}