{"id":{"repo_id":"wvu","oai_identifier":"oai:researchrepository.wvu.edu:etd-1941"},"canonical_url":"https://search.dev.ndltd.org/etd/wvu/oai:researchrepository.wvu.edu:etd-1941","repository":{"repo_id":"wvu","name":"West Virginia University","base_url":"https://researchrepository.wvu.edu/do/oai/"},"display":{"title":"Prediction of turbulent mixing at the interface of density stratified, shear flows using CFD","abstract":"Numerical simulations were performed involving stratified, shear flows that have been investigated experimentally. One set of simulations dealt with a homogeneous shear flow involving miscible fluids. The other set of simulations dealt with a developing shear layer involving immiscible fluids. The re-fueling of a compensated fuel/ballast tank, which is partially characterized by a shear layer, was also simulated. In all the simulations a single fluid, scalar transport multiphase model and the k-epsilon turbulence model were used. In the simulations involving miscible fluids an interfacial thickness relationship given by delta/H∼(Ri*)--2.1 and an entrainment relationship given by E∼(Ri*)--1.1 were predicted. These relationships agree with experimental observations. Results from the simulations involving immiscible fluids show a strong gradient Richardson number dependence where the gradient Richardson number ranged from Ri G = 0.05 to RiG = 0.25. The simulations of the compensated fuel/ballast tank showed that buoyant flow events around internal manholes caused a significant amount of mixing.","abstract_html":"Numerical simulations were performed involving stratified, shear flows that have been investigated experimentally. One set of simulations dealt with a homogeneous shear flow involving miscible fluids. The other set of simulations dealt with a developing shear layer involving immiscible fluids. The re-fueling of a compensated fuel/ballast tank, which is partially characterized by a shear layer, was also simulated. In all the simulations a single fluid, scalar transport multiphase model and the k-epsilon turbulence model were used. In the simulations involving miscible fluids an interfacial thickness relationship given by delta/H∼(Ri*)--2.1 and an entrainment relationship given by E∼(Ri*)--1.1 were predicted. These relationships agree with experimental observations. Results from the simulations involving immiscible fluids show a strong gradient Richardson number dependence where the gradient Richardson number ranged from Ri G = 0.05 to RiG = 0.25. The simulations of the compensated fuel/ballast tank showed that buoyant flow events around internal manholes caused a significant amount of mixing.","abstract_has_math":false,"creators":["Umbel, Matthew Robert"],"institution":null,"degree_name":"MS","degree_level":"Thesis","degree_discipline":"Mechanical and Aerospace Engineering","degree_department":null,"school":null,"contributors":["Ismail Celik."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1998,"date_issued":"1998-12-01T08:00:00Z","date_published":"1998-12-01T08:00:00Z","updated_at":"2026-07-24T06:15:08Z","subjects":["Mechanical engineering","Chemical engineering"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://researchrepository.wvu.edu/etd/938"],"render_values":[{"text":"https://researchrepository.wvu.edu/etd/938","href":"https://researchrepository.wvu.edu/etd/938","code":true}]}]},"links":{"outbound_url":"https://doi.org/10.33915/etd.938","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ismail Celik."]},{"key":"dc:creator","label":"Author","values":["Umbel, Matthew Robert"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2019-01-17T08:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical and Aerospace Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["MS"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Mechanical engineering","Chemical engineering"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://doi.org/10.33915/etd.938","https://researchrepository.wvu.edu/etd/938"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Numerical simulations were performed involving stratified, shear flows that have been investigated experimentally. One set of simulations dealt with a homogeneous shear flow involving miscible fluids. The other set of simulations dealt with a developing shear layer involving immiscible fluids. The re-fueling of a compensated fuel/ballast tank, which is partially characterized by a shear layer, was also simulated. In all the simulations a single fluid, scalar transport multiphase model and the k-epsilon turbulence model were used. In the simulations involving miscible fluids an interfacial thickness relationship given by delta/H∼(Ri*)--2.1 and an entrainment relationship given by E∼(Ri*)--1.1 were predicted. These relationships agree with experimental observations. Results from the simulations involving immiscible fluids show a strong gradient Richardson number dependence where the gradient Richardson number ranged from Ri G = 0.05 to RiG = 0.25. The simulations of the compensated fuel/ballast tank showed that buoyant flow events around internal manholes caused a significant amount of mixing."]},{"key":"dc:title","label":"Title","values":["Prediction of turbulent mixing at the interface of density stratified, shear flows using CFD"]}]}],"canonical_facts":{"dc:contributor":["Ismail Celik."],"dc:creator":["Umbel, Matthew Robert"],"dc:date.available":["2019-01-17T08:00:00Z"],"dc:description.abstract":["Numerical simulations were performed involving stratified, shear flows that have been investigated experimentally. One set of simulations dealt with a homogeneous shear flow involving miscible fluids. The other set of simulations dealt with a developing shear layer involving immiscible fluids. The re-fueling of a compensated fuel/ballast tank, which is partially characterized by a shear layer, was also simulated. In all the simulations a single fluid, scalar transport multiphase model and the k-epsilon turbulence model were used. In the simulations involving miscible fluids an interfacial thickness relationship given by delta/H∼(Ri*)--2.1 and an entrainment relationship given by E∼(Ri*)--1.1 were predicted. These relationships agree with experimental observations. Results from the simulations involving immiscible fluids show a strong gradient Richardson number dependence where the gradient Richardson number ranged from Ri G = 0.05 to RiG = 0.25. The simulations of the compensated fuel/ballast tank showed that buoyant flow events around internal manholes caused a significant amount of mixing."],"dc:identifier":["https://doi.org/10.33915/etd.938","https://researchrepository.wvu.edu/etd/938"],"dc:subject":["Mechanical engineering","Chemical engineering"],"dc:title":["Prediction of turbulent mixing at the interface of density stratified, shear flows using CFD"],"thesis:degree_discipline":["Mechanical and Aerospace Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["MS"]},"updated_at":"2026-07-24T06:15:08Z"}