{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/82358"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/82358","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Dynamics of Flow-Induced Structure Formation in Drag Reducing Polymer Solutions","abstract":"Work on the effects of strong shear on the molecular weight stability finds small degradation in the polymers' average molecular weight and molecular weight distribution. Experiments with HPAM and PAM solutions in a large channel flow loop at Re ≥ 20,000 provide evidence of the importance of chain degradation to changes in drag reduction with time. Losses in molecular weight are small in the case of HPAM and do not correspond to losses in drag reduction. The PAM solutions demonstrate no change in the molecular weight distribution over the first 13--16% loss in DR followed by a loss in the high molecular weight tail at greater losses in DR.","abstract_html":"Work on the effects of strong shear on the molecular weight stability finds small degradation in the polymers' average molecular weight and molecular weight distribution. Experiments with HPAM and PAM solutions in a large channel flow loop at Re ≥ 20,000 provide evidence of the importance of chain degradation to changes in drag reduction with time. Losses in molecular weight are small in the case of HPAM and do not correspond to losses in drag reduction. The PAM solutions demonstrate no change in the molecular weight distribution over the first 13--16% loss in DR followed by a loss in the high molecular weight tail at greater losses in DR.","abstract_has_math":false,"creators":["Liberatore, Matthew Walter"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemical Engineering","degree_department":null,"school":null,"contributors":["McHugh, Anthony J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T20:43:17Z","date_published":"2015-09-25T20:43:17Z","updated_at":"2026-07-22T22:26:18Z","subjects":["Engineering, Chemical"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3111568"],"render_values":[{"text":"(MiAaPQ)AAI3111568","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/82358","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["McHugh, Anthony J."]},{"key":"dc:creator","label":"Author","values":["Liberatore, Matthew Walter"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T20:43:17Z","10000-01-01","2003"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemical 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, Chemical"]}]},{"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/2142/82358","(MiAaPQ)AAI3111568"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Work on the effects of strong shear on the molecular weight stability finds small degradation in the polymers' average molecular weight and molecular weight distribution. Experiments with HPAM and PAM solutions in a large channel flow loop at Re ≥ 20,000 provide evidence of the importance of chain degradation to changes in drag reduction with time. Losses in molecular weight are small in the case of HPAM and do not correspond to losses in drag reduction. The PAM solutions demonstrate no change in the molecular weight distribution over the first 13--16% loss in DR followed by a loss in the high molecular weight tail at greater losses in DR.","Made available in DSpace on 2015-09-25T20:43:17Z (GMT). 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Experiments with HPAM and PAM solutions in a large channel flow loop at Re ≥ 20,000 provide evidence of the importance of chain degradation to changes in drag reduction with time. Losses in molecular weight are small in the case of HPAM and do not correspond to losses in drag reduction. The PAM solutions demonstrate no change in the molecular weight distribution over the first 13--16% loss in DR followed by a loss in the high molecular weight tail at greater losses in DR.","Made available in DSpace on 2015-09-25T20:43:17Z (GMT). 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