{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/83960"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/83960","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Study of Three-Dimensional Vortex Shedding in the Wake of a Square Cylinder","abstract":"It is observed that three-dimensional transition process for square cylinder is similar to that of a circular cylinder. Most notably there is a long wave-length three-dimensional disturbance which becomes unstable at a Reynolds number about 170, followed by the appearance of a short wavelength instability. However, this stability analysis also predicts a intermediate wavenumber disturbance which has a shedding frequency twice that of the base flow. This intermediate wavelength mode has not been observed in analysis of the circular cylinder. The presence of this new intermediate wavelength mode may explain the complicated behavior observed in direct numerical simulations of the non-linear three-dimensional Navier-Stokes equations at low Reynolds numbers.","abstract_html":"It is observed that three-dimensional transition process for square cylinder is similar to that of a circular cylinder. Most notably there is a long wave-length three-dimensional disturbance which becomes unstable at a Reynolds number about 170, followed by the appearance of a short wavelength instability. However, this stability analysis also predicts a intermediate wavenumber disturbance which has a shedding frequency twice that of the base flow. This intermediate wavelength mode has not been observed in analysis of the circular cylinder. The presence of this new intermediate wavelength mode may explain the complicated behavior observed in direct numerical simulations of the non-linear three-dimensional Navier-Stokes equations at low Reynolds numbers.","abstract_has_math":false,"creators":["Robichaux, Joseph H."],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Balachandar, S."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T21:12:55Z","date_published":"2015-09-25T21:12:55Z","updated_at":"2026-07-22T22:26:22Z","subjects":["Engineering, Mechanical"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI9812755"],"render_values":[{"text":"(MiAaPQ)AAI9812755","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/83960","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Balachandar, S."]},{"key":"dc:creator","label":"Author","values":["Robichaux, Joseph H."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T21:12:55Z","10000-01-01","1997"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"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":["Engineering, Mechanical"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/83960","(MiAaPQ)AAI9812755"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["It is observed that three-dimensional transition process for square cylinder is similar to that of a circular cylinder. Most notably there is a long wave-length three-dimensional disturbance which becomes unstable at a Reynolds number about 170, followed by the appearance of a short wavelength instability. However, this stability analysis also predicts a intermediate wavenumber disturbance which has a shedding frequency twice that of the base flow. This intermediate wavelength mode has not been observed in analysis of the circular cylinder. The presence of this new intermediate wavelength mode may explain the complicated behavior observed in direct numerical simulations of the non-linear three-dimensional Navier-Stokes equations at low Reynolds numbers.","Made available in DSpace on 2015-09-25T21:12:55Z (GMT). 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Most notably there is a long wave-length three-dimensional disturbance which becomes unstable at a Reynolds number about 170, followed by the appearance of a short wavelength instability. However, this stability analysis also predicts a intermediate wavenumber disturbance which has a shedding frequency twice that of the base flow. This intermediate wavelength mode has not been observed in analysis of the circular cylinder. The presence of this new intermediate wavelength mode may explain the complicated behavior observed in direct numerical simulations of the non-linear three-dimensional Navier-Stokes equations at low Reynolds numbers.","Made available in DSpace on 2015-09-25T21:12:55Z (GMT). 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