{"created":"2023-06-26T11:01:54.976157+00:00","id":2672,"links":{},"metadata":{"_buckets":{"deposit":"1721a58c-5bdd-4122-bcf3-62ba943c239e"},"_deposit":{"created_by":31,"id":"2672","owners":[31],"pid":{"revision_id":0,"type":"depid","value":"2672"},"status":"published"},"_oai":{"id":"oai:oist.repo.nii.ac.jp:00002672","sets":["6:54"]},"author_link":["17282","17280","17281"],"item_10001_biblio_info_7":{"attribute_name":"Bibliographic Information","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2022-06-13","bibliographicIssueDateType":"Issued"},"bibliographic_titles":[{},{"bibliographic_title":"Soft Matter","bibliographic_titleLang":"en"}]}]},"item_10001_creator_3":{"attribute_name":"Author","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Hopkins, Cameron C."}],"nameIdentifiers":[{"nameIdentifier":"17280","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Haward, Simon J."}],"nameIdentifiers":[{"nameIdentifier":"17281","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Shen, Amy Q."}],"nameIdentifiers":[{"nameIdentifier":"17282","nameIdentifierScheme":"WEKO"}]}]},"item_10001_description_5":{"attribute_name":"Abstract","attribute_value_mlt":[{"subitem_description":"We report a novel inertia-less, elastic flow instability for a viscoelastic, shear-thinning wormlike micellar solution flowing past a microcylinder in a channel with blockage ratio BR = 2R/W = 0.5 and aspect ratio α = H/W ≈ 5, where R ≈ 100 μm is the cylinder radius, W is the channel width, and H is the channel height. The instability manifests upstream of the cylinder and changes form with increasing Weissenberg number over the range 0.5 ≲ Wi = Uλ/R ≲ 900, where U is the average flow velocity and λ is the terminal relaxation time of the fluid. Beyond a first critical Wi, the instability begins as a bending of the streamlines near the upstream pole of the cylinder that breaks the symmetry of the flow. Beyond a second critical Wi, small, time-steady, and approximately symmetric wall-attached vortices form upstream of the cylinder. Beyond a third critical Wi, the flow becomes time dependent and pulses with a characteristic frequency commensurate with the breakage timescale of the wormlike micelles. This is accompanied by a breaking of the symmetry of the wall-attached vortices, where one vortex becomes considerably larger than the other. Finally, beyond a fourth critical Wi, a vortex forms attached to the upstream pole of the cylinder whose length fluctuates in time. The flow is highly time dependent, and the cylinder-attached vortex and wall-attached vortices compete dynamically for space and time in the channel. Our results add to the rapidly growing understanding of viscoelastic flow instabilities in microfluidic geometries.","subitem_description_type":"Other"}]},"item_10001_publisher_8":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_publisher":"Royal Society of Chemistry"}]},"item_10001_relation_13":{"attribute_name":"PubMedNo.","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"info:pmid/35730936","subitem_relation_type_select":"PMID"}}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"info:doi/10.1039/D2SM00418F","subitem_relation_type_select":"DOI"}}]},"item_10001_relation_17":{"attribute_name":"Related site","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://pubs.rsc.org/en/content/articlelanding/2022/SM/D2SM00418F","subitem_relation_type_select":"URI"}}]},"item_10001_rights_15":{"attribute_name":"Rights","attribute_value_mlt":[{"subitem_rights":"© 2022 The Author(s)"}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1744-683X","subitem_source_identifier_type":"ISSN"},{"subitem_source_identifier":"1744-6848","subitem_source_identifier_type":"ISSN"}]},"item_10001_version_type_20":{"attribute_name":"Author's flag","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2022-07-04"}],"displaytype":"detail","filename":"Hopkins-Upstream wall vortices in viscoelastic.pdf","filesize":[{"value":"7.4 MB"}],"format":"application/pdf","licensetype":"license_9","mimetype":"application/pdf","url":{"label":"Hopkins-Upstream wall vortices in viscoelastic","url":"https://oist.repo.nii.ac.jp/record/2672/files/Hopkins-Upstream wall vortices in viscoelastic.pdf"},"version_id":"2d96e9c9-a4f9-4f49-a9cb-21068c734374"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"wormlike micellar-solutions","subitem_subject_scheme":"Other"},{"subitem_subject":"elastic instabilities","subitem_subject_scheme":"Other"},{"subitem_subject":"numerical-simulation","subitem_subject_scheme":"Other"},{"subitem_subject":"surfactant solutions","subitem_subject_scheme":"Other"},{"subitem_subject":"living polymers","subitem_subject_scheme":"Other"},{"subitem_subject":"dynamics","subitem_subject_scheme":"Other"},{"subitem_subject":"model","subitem_subject_scheme":"Other"},{"subitem_subject":"fluid","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Upstream wall vortices in viscoelastic flow past a cylinder","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Upstream wall vortices in viscoelastic flow past a cylinder","subitem_title_language":"en"}]},"item_type_id":"10001","owner":"31","path":["54"],"pubdate":{"attribute_name":"公開日","attribute_value":"2022-07-04"},"publish_date":"2022-07-04","publish_status":"0","recid":"2672","relation_version_is_last":true,"title":["Upstream wall vortices in viscoelastic flow past a cylinder"],"weko_creator_id":"31","weko_shared_id":31},"updated":"2023-06-26T11:26:40.694128+00:00"}