{"created":"2023-06-20T16:48:42.512065+00:00","id":20724,"links":{},"metadata":{"_buckets":{"deposit":"8888f3af-0c9c-4c60-891d-8cf50c7fd48f"},"_deposit":{"created_by":3,"id":"20724","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"20724"},"status":"published"},"_oai":{"id":"oai:kindai.repo.nii.ac.jp:00020724","sets":["14:2667:4550"]},"author_link":["43095","43096"],"control_number":"20724","item_8_biblio_info_21":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2019","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"6","bibliographicPageStart":"1","bibliographic_titles":[{"bibliographic_title":"科学研究費助成事業研究成果報告書 (2018)"}]}]},"item_8_description_25":{"attribute_name":"リンクURL","attribute_value_mlt":[{"subitem_description":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16K06096/","subitem_description_type":"Other"}]},"item_8_description_33":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"研究成果の概要（和文）：本研究課題では，2次元チャネル流の片壁面に設けた粗さ要素によって生じる圧力抵抗の発生要因を速度勾配テンソルの第2不変量の符号および大きさに基づき明らかにした．粗さ要素は2次矩形形状とし，粗さピッチ比を2，4および8とした．壁面抵抗係数は粗さピッチ比により増加し，その増加は圧力抵抗によることが確認された．平均速度勾配テンソルの第2不変量の分布から，粗さ底層内の粗さ要素間溝部下流側粗さ要素側面近傍において，粗さピッチ比により第2不変量は負値でその絶対値は増加する．これは，溝部下流側粗さ要素側面における圧力に対して正値の寄与し，圧力の正値は粗さピッチ比によって大きくなることに対応する．研究成果の概要（英文）：The mechanism of pressure drag generation was investigated for a channel flow with transverse roughness elements on one wall. The square rod roughness elements is arranged with the roughness pitch ratio of 2, 4 and 8. The friction coefficient increases with the roughness pitch ratio. The increment is due to the pressure drag acting on the roughness. The pressure drag is occurred by the transport of Reynolds shear stress above the cavity between roughness elements. The profiles of the second invariant of the mean velocity gradient tensor have a negative value near the downstream side wall in the cavity, and the absolute value increases with the roughness pitch ratio. The negative value of the invariant contributes to positive pressure on the side wall and the value of the positive pressure depends on the roughness pitch ratio.","subitem_description_type":"Abstract"}]},"item_8_description_36":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"研究種目：基盤研究(C);  研究期間：2016～2018;   課題番号：16K06096;   研究分野：流体工学;   科研費の分科・細目：","subitem_description_type":"Other"}]},"item_8_description_37":{"attribute_name":"資源タイプ(WEKO2)","attribute_value_mlt":[{"subitem_description":"Research Paper","subitem_description_type":"Other"}]},"item_8_description_41":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_8_publisher_14":{"attribute_name":"出版者 名前","attribute_value_mlt":[{"subitem_publisher":"近畿大学"}]},"item_8_text_10":{"attribute_name":"著者 役割","attribute_value_mlt":[{"subitem_text_value":"研究代表者"},{"subitem_text_value":"研究協力者"}]},"item_8_text_7":{"attribute_name":"著者(英)","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Kameda, Takatsugu"},{"subitem_text_language":"en","subitem_text_value":"Mochizuki, Shinsuke"}]},"item_8_text_8":{"attribute_name":"著者 所属","attribute_value_mlt":[{"subitem_text_value":"近畿大学工学部; 准教授"}]},"item_8_text_9":{"attribute_name":"著者所属(翻訳)","attribute_value_mlt":[{"subitem_text_value":"Kindai University"}]},"item_8_version_type_12":{"attribute_name":"版","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_be7fb7dd8ff6fe43","subitem_version_type":"NA"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"亀田, 孝嗣"},{"creatorName":"カメダ, タカツグ","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{},{}]},{"creatorNames":[{"creatorName":"望月, 信介"},{"creatorName":"モチヅキ, シンスケ","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-03-12"}],"displaytype":"detail","filename":"16K06096seika.pdf","filesize":[{"value":"662.0 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"16K06096seika.pdf","url":"https://kindai.repo.nii.ac.jp/record/20724/files/16K06096seika.pdf"},"version_id":"33ccf9bd-05e4-4c8e-ae6e-0bdbdeb2c269"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"二次元チャネル流","subitem_subject_scheme":"Other"},{"subitem_subject":"粗面","subitem_subject_scheme":"Other"},{"subitem_subject":"乱流","subitem_subject_scheme":"Other"},{"subitem_subject":"せん断流","subitem_subject_scheme":"Other"},{"subitem_subject":"壁面抵抗","subitem_subject_scheme":"Other"},{"subitem_subject":"テンソル第二不変量","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"research report","resourceuri":"http://purl.org/coar/resource_type/c_18ws"}]},"item_title":"速度勾配テンソル第2不変量に基づく壁面せん断乱流の圧力抵抗発生機構の探究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"速度勾配テンソル第2不変量に基づく壁面せん断乱流の圧力抵抗発生機構の探究","subitem_title_language":"ja"},{"subitem_title":"Investigation of mechanism of pressure drag generation for a wall bounded shear flow by the second invariant of velocity gradient tensor","subitem_title_language":"en"}]},"item_type_id":"8","owner":"3","path":["4550"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2020-03-12"},"publish_date":"2020-03-12","publish_status":"0","recid":"20724","relation_version_is_last":true,"title":["速度勾配テンソル第2不変量に基づく壁面せん断乱流の圧力抵抗発生機構の探究"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2023-09-21T06:06:05.010358+00:00"}