{"created":"2023-06-26T11:00:32.840769+00:00","id":1046,"links":{},"metadata":{"_buckets":{"deposit":"0127533a-3fbb-4f23-9ae5-a3ddf3eb101f"},"_deposit":{"created_by":26,"id":"1046","owners":[26],"pid":{"revision_id":0,"type":"depid","value":"1046"},"status":"published"},"_oai":{"id":"oai:oist.repo.nii.ac.jp:00001046","sets":["6:16"]},"author_link":["5778","5777"],"item_10001_biblio_info_7":{"attribute_name":"Bibliographic Information","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2019-03-19","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"173","bibliographicPageStart":"147","bibliographicVolumeNumber":"20","bibliographic_titles":[{},{"bibliographic_title":"Journal of Turbulence","bibliographic_titleLang":"en"}]}]},"item_10001_creator_3":{"attribute_name":"Author","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Barros, Julio M."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Christensen, Kenneth T."}],"nameIdentifiers":[{}]}]},"item_10001_description_5":{"attribute_name":"Abstract","attribute_value_mlt":[{"subitem_description":"The structural attributes of turbulent flow over a complex roughness topography are explored using high-frame-rate stereo particle-image velocimetry measurements in the wall-normal–spanwise plane. The roughness under consideration was replicated from a turbine blade damaged by deposition of foreign materials and contains a broad range of topographical scales arranged in a highly irregular manner. Previous results from Barros and Christensen [Observations of turbulent secondary flows in a rough-wall boundary layer. J Fluid Mech. 2014;748] revealed strong spanwise heterogeneity in the flow attributed to the formation of roughness-induced turbulent secondary flows identified by spanwise-alternating low- and high-momentum flow pathways (HMP & LMP, respectively) in the mean flow marked by enhanced Reynolds stresses and turbulent kinetic energy. Frequency spectra of streamwise velocity at fixed wall-normal location presented herein also display strong dependence on spanwise position. In particular, the roughness promotes enhanced energy content of the large-scale and smaller-scale motions (as opposed to very-large-scale ones). Depending on spanwise position, pre-multiplied spectra highlight significant modification of the energy content of the very large-scale motions (superstructures) due to roughness compared to smooth-wall flow. Of note, a shift in both TKE and RSS content to shorter streamwise scales at an LMP was noted, while less of an impact was found coincident with an HMP.","subitem_description_type":"Other"}]},"item_10001_publisher_8":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_publisher":"Taylor & Francis"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"info:doi/10.1080/14685248.2019.1595634","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://www.tandfonline.com/doi/abs/10.1080/14685248.2019.1595634","subitem_relation_type_select":"URI"}}]},"item_10001_rights_15":{"attribute_name":"Rights","attribute_value_mlt":[{"subitem_rights":"© 2019 Taylor and Francis Group"},{"subitem_rights":"This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Turbulence on 19/03/2019, available online: http://www.tandfonline.com/10.1080/14685248.2019.1595634."}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1468-5248","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_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-03-19"}],"displaytype":"detail","filename":"Roughness_SpectraAnalysis_Paper_JOT_Accepted.pdf","filesize":[{"value":"11.8 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Roughness_SpectraAnalysis_Paper_JOT_Accepted","url":"https://oist.repo.nii.ac.jp/record/1046/files/Roughness_SpectraAnalysis_Paper_JOT_Accepted.pdf"},"version_id":"50275f5d-acc2-4393-8dad-2ebd56d6111f"}]},"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":"Characteristics of large-scale and superstructure motions in a turbulent boundary layer overlying complex roughness","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Characteristics of large-scale and superstructure motions in a turbulent boundary layer overlying complex roughness","subitem_title_language":"en"}]},"item_type_id":"10001","owner":"26","path":["16"],"pubdate":{"attribute_name":"公開日","attribute_value":"2019-07-30"},"publish_date":"2019-07-30","publish_status":"0","recid":"1046","relation_version_is_last":true,"title":["Characteristics of large-scale and superstructure motions in a turbulent boundary layer overlying complex roughness"],"weko_creator_id":"26","weko_shared_id":26},"updated":"2023-06-26T11:57:37.351226+00:00"}