{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/106199"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/106199","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Oscillatory and streaming flows in microchannels","abstract":"This Thesis was approved for publication on 2019-12-03 at 10:21.","abstract_html":"This Thesis was approved for publication on 2019-12-03 at 10:21.","abstract_has_math":false,"creators":["Vishwanathan, Giri"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Juarez, Gabriel"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2020,"date_issued":"2020-03-02T21:58:13Z","date_published":"2020-03-02T21:58:13Z","updated_at":"2026-07-22T22:24:45Z","subjects":["microfluidics, oscillatory, acoustic streaming, viscoelastic"],"languages":["en"],"rights":["Copyright 2019 Giri Vishwanathan"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/106199","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Juarez, Gabriel"]},{"key":"dc:creator","label":"Author","values":["Vishwanathan, Giri"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2020-03-02T21:58:13Z","2019-12-03","2019-12"]},{"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":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"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":["microfluidics, oscillatory, acoustic streaming, viscoelastic"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2019 Giri Vishwanathan"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/106199"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This Thesis was approved for publication on 2019-12-03 at 10:21.","DSpace SAF Submission Ingestion Package generated from Vireo submission #14577 on 2020-02-28 at 17:13:51","Made available in DSpace on 2020-03-02T21:58:13Z (GMT). No. of bitstreams: 2 VISHWANATHAN-THESIS-2019.pdf: 4919941 bytes, checksum: 5be8938c9c976e92fa71470f80397936 (MD5) LICENSE.txt: 4214 bytes, checksum: 132fb3aae42f6bfe428dc668fc3c3f1b (MD5) Previous issue date: 2019-12-03","Microfluidics is the study of liquid flow in the small scale (10-1000 micron) channel networks and is widely used in chemistry and biology as a platform for analysis synthesis and manipulation. The construction, performance characterization and validation of an oscillatory driver capable of producing oscillatory flow in microfluidic channels in the frequency range 10-1000 Hz is detailed. The application of micro-scale oscillatory flows is broadly divided into two categories. The first using the time reversing nature of the flow for decreasing device size or for prolonged optical observation and the second involving the the use of steady secondary rectified flows which arise due to fluid inertia. Both of these application categories are shown to be effectively realizable in this frequency range through the demonstration of inertial particle focusing in the former and microscale mixing in the latter. Additionally, the particular case of steady rectified flows originating from a rigid cylindrical boundary or steady streaming as it is commonly known is used to perform a probe-free optical measurement of the kinematic viscosity of Newtonian liquids. This is followed by a study of steady streaming flows in well characterized model viscoelastic liquids of two kinds: namely the Boger fluid and the fractional Maxwell liquid. The streaming flow. Steady streaming velocity profiles in elastic liquids with strong shear thinning (fractional Maxwell liquids), however, display two unique features in the confined microfluidic system: (i) a non monotonic evolution of the inner streaming layer with increasing frequency, first growing then decreasing in width, and (ii) a clear asymmetry in the flow profile at high frequencies.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2020-02-28 without embargo terms","The student, Giri Vishwanathan, accepted the attached license on 2019-11-20 at 21:47.","The student, Giri Vishwanathan, submitted this Thesis for approval on 2019-11-20 at 21:57."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Oscillatory and streaming flows in microchannels"]}]}],"canonical_facts":{"dc:contributor":["Juarez, Gabriel"],"dc:creator":["Vishwanathan, Giri"],"dc:date":["2020-03-02T21:58:13Z","2019-12-03","2019-12"],"dc:description":["This Thesis was approved for publication on 2019-12-03 at 10:21.","DSpace SAF Submission Ingestion Package generated from Vireo submission #14577 on 2020-02-28 at 17:13:51","Made available in DSpace on 2020-03-02T21:58:13Z (GMT). No. of bitstreams: 2 VISHWANATHAN-THESIS-2019.pdf: 4919941 bytes, checksum: 5be8938c9c976e92fa71470f80397936 (MD5) LICENSE.txt: 4214 bytes, checksum: 132fb3aae42f6bfe428dc668fc3c3f1b (MD5) Previous issue date: 2019-12-03","Microfluidics is the study of liquid flow in the small scale (10-1000 micron) channel networks and is widely used in chemistry and biology as a platform for analysis synthesis and manipulation. The construction, performance characterization and validation of an oscillatory driver capable of producing oscillatory flow in microfluidic channels in the frequency range 10-1000 Hz is detailed. The application of micro-scale oscillatory flows is broadly divided into two categories. The first using the time reversing nature of the flow for decreasing device size or for prolonged optical observation and the second involving the the use of steady secondary rectified flows which arise due to fluid inertia. Both of these application categories are shown to be effectively realizable in this frequency range through the demonstration of inertial particle focusing in the former and microscale mixing in the latter. Additionally, the particular case of steady rectified flows originating from a rigid cylindrical boundary or steady streaming as it is commonly known is used to perform a probe-free optical measurement of the kinematic viscosity of Newtonian liquids. This is followed by a study of steady streaming flows in well characterized model viscoelastic liquids of two kinds: namely the Boger fluid and the fractional Maxwell liquid. The streaming flow. Steady streaming velocity profiles in elastic liquids with strong shear thinning (fractional Maxwell liquids), however, display two unique features in the confined microfluidic system: (i) a non monotonic evolution of the inner streaming layer with increasing frequency, first growing then decreasing in width, and (ii) a clear asymmetry in the flow profile at high frequencies.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2020-02-28 without embargo terms","The student, Giri Vishwanathan, accepted the attached license on 2019-11-20 at 21:47.","The student, Giri Vishwanathan, submitted this Thesis for approval on 2019-11-20 at 21:57."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/106199"],"dc:language":["en"],"dc:rights":["Copyright 2019 Giri Vishwanathan"],"dc:subject":["microfluidics, oscillatory, acoustic streaming, viscoelastic"],"dc:title":["Oscillatory and streaming flows in microchannels"],"dc:type":["text"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:45Z"}