{"id":{"repo_id":"gatech","oai_identifier":"oai:repository.gatech.edu:1853/11520"},"canonical_url":"https://search.dev.ndltd.org/etd/gatech/oai:repository.gatech.edu:1853/11520","repository":{"repo_id":"gatech","name":"Georgia Tech","base_url":"https://repository.gatech.edu/server/oai/request"},"display":{"title":"A New Two-Scale Decomposition Approach for Large-Eddy Simulation of Turbulent Flows","abstract":"A novel computational approach, Two Level Simulation (TLS), was developed based on the explicit reconstruction of the small-scale velocity by solving the small-scale governing equations on the domain with reduced dimension representing a collection of one-dimensional lines embedded in the three-dimensional flow domain. A coupled system of equations, that is not based on an eddy-viscosity hypothesis, was derived based on the decomposition of flow variables into the large-scale and the small-scale components without introducing the concept of filtering. Simplified treatment of the small-scale equations was proposed based on modeling of the small-scale advective derivatives and the small-scale dissipative terms in the directions orthogonal to the lines. TLS approach was tested to simulate benchmark cases of turbulent flows, including forced isotropic turbulence, mixing layers and well-developed channel flow, and demonstrated good capabilities to capture turbulent flow features using relatively coarse grids.","abstract_html":"A novel computational approach, Two Level Simulation (TLS), was developed based on the explicit reconstruction of the small-scale velocity by solving the small-scale governing equations on the domain with reduced dimension representing a collection of one-dimensional lines embedded in the three-dimensional flow domain. A coupled system of equations, that is not based on an eddy-viscosity hypothesis, was derived based on the decomposition of flow variables into the large-scale and the small-scale components without introducing the concept of filtering. Simplified treatment of the small-scale equations was proposed based on modeling of the small-scale advective derivatives and the small-scale dissipative terms in the directions orthogonal to the lines. TLS approach was tested to simulate benchmark cases of turbulent flows, including forced isotropic turbulence, mixing layers and well-developed channel flow, and demonstrated good capabilities to capture turbulent flow features using relatively coarse grids.","abstract_has_math":false,"creators":["Kemenov, Konstantin A."],"institution":"Georgia Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Aerospace Engineering","school":null,"contributors":[],"advisors":["Menon, Suresh"],"committee_chairs":[],"committee_members":["Bunimovich, Leonid","Cvitanovic', Predrag","Sankar, Lakshmi N.","Yeung, P. K."],"year":2006,"date_issued":"2006-06-22","date_published":"2006-06-22","updated_at":"2026-07-27T19:50:08Z","subjects":["Turbulent flows","Large eddy simulations","Subgrid-scale modeling"],"languages":["en_US"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1853/11520","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Menon, Suresh"]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Bunimovich, Leonid","Cvitanovic', Predrag","Sankar, Lakshmi N.","Yeung, P. 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A coupled system of equations, that is not based on an eddy-viscosity hypothesis, was derived based on the decomposition of flow variables into the large-scale and the small-scale components without introducing the concept of filtering. Simplified treatment of the small-scale equations was proposed based on modeling of the small-scale advective derivatives and the small-scale dissipative terms in the directions orthogonal to the lines. 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K."],"dc:contributor.department":["Aerospace Engineering"],"dc:creator":["Kemenov, Konstantin A."],"dc:date.accessioned":["2006-09-01T19:29:37Z"],"dc:date.available":["2006-09-01T19:29:37Z"],"dc:date.issued":["2006-06-22"],"dc:description.abstract":["A novel computational approach, Two Level Simulation (TLS), was developed based on the explicit reconstruction of the small-scale velocity by solving the small-scale governing equations on the domain with reduced dimension representing a collection of one-dimensional lines embedded in the three-dimensional flow domain. A coupled system of equations, that is not based on an eddy-viscosity hypothesis, was derived based on the decomposition of flow variables into the large-scale and the small-scale components without introducing the concept of filtering. Simplified treatment of the small-scale equations was proposed based on modeling of the small-scale advective derivatives and the small-scale dissipative terms in the directions orthogonal to the lines. TLS approach was tested to simulate benchmark cases of turbulent flows, including forced isotropic turbulence, mixing layers and well-developed channel flow, and demonstrated good capabilities to capture turbulent flow features using relatively coarse grids."],"dc:description.degree":["Ph.D."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["http://hdl.handle.net/1853/11520"],"dc:language.iso":["en_US"],"dc:publisher":["Georgia Institute of Technology"],"dc:subject":["Turbulent flows","Large eddy simulations","Subgrid-scale modeling"],"dc:title":["A New Two-Scale Decomposition Approach for Large-Eddy Simulation of Turbulent Flows"],"dc:type":["Text"]},"updated_at":"2026-07-27T19:50:08Z"}