{"created":"2023-06-20T15:08:19.790725+00:00","id":37750,"links":{},"metadata":{"_buckets":{"deposit":"bc9acb97-1217-4441-ad40-a0744405e915"},"_deposit":{"created_by":1,"id":"37750","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"37750"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00037750","sets":["1887:1891","1896:1898:1913:1915"]},"author_link":["482833","482832"],"item_5_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Absolute and convective chaos in a wake"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1993-11","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"57","bibliographicPageStart":"55","bibliographicVolumeNumber":"21","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所特別資料:「境界層遷移の解明と制御」研究会講演論文集(第11回・第12回)"},{"bibliographic_title":"Proceedings of the 11th and 12th NAL Workshop on 'Investigation and Control of Boundary-Layer Transition'. Special Publication of National Aerospace Laboratory","bibliographic_titleLang":"en"}]}]},"item_5_description_14":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"航空宇宙技術研究所 28-29 Sep. 1992. 25-26 Apr.1993 東京 日本","subitem_description_type":"Other"}]},"item_5_description_15":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）（英）","attribute_value_mlt":[{"subitem_description":"National Aerospace Laboratory 28-29 Sep. 1992. 25-26 Apr.1993 Tokyo Japan","subitem_description_type":"Other"}]},"item_5_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"本論文では、空間的に発達する2次元後流の直接シミュレーションを行うことにより、後流における対流カオスと絶対カオスとを調べた。後流が対流的に不安定な場合は、上流端において基本モードに重ねられた低いレベルのノイズ的外乱を印加する。絶対的に不安定な後流については、上流端において基本モードを振幅0.0005で1周期のあいだ印加する。uとvの速度変動および対応する瞬間的構造の時間軌跡を調べた。対流不安定波の計算結果は、対流不安定層中で増幅された低レベルの外部擾乱により対流不安定がひき起こされることを示す。絶対不安定後流については、上流端における加振がなくなった後もuおよびv速度変動は振動を続け、絶対不安定層における初期擾乱モードの変調の間に発生した低周波モードが絶対カオスにつながることがわかった。","subitem_description_type":"Abstract"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"In the present paper, convective chaos and absolute chaos in a wake were studied by means of two-dimensional direct numerical simulations of a spatially developing plane wake. When the wake is convective unstable, the inlet plane was forced with low-level external noise superimposed on the fundamental mode. In the absolute unstable wake, a fundamental mode of amplitude 0.0005 was introduced at the inlet plane for one period. The time traces of the u and v; velocity fluctuations and the corresponding instantaneous structures were investigated. The numerical results of the convective unstable wake show that the low-level external noise amplified spatially in the convective unstable layer is responsible for convective chaos. For the absolute unstable wake, the phenomena that the u and v velocity fluctuations continue to oscillate after the inlet forcing stopped and that low-frequency modes generated during the modulation of the initial disturbance mode are found.","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0004170013","subitem_description_type":"Other"}]},"item_5_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: NAL SP-21","subitem_description_type":"Other"}]},"item_5_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"航空宇宙技術研究所"}]},"item_5_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"National Aerospace Laboratory (NAL)"}]},"item_5_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0289-260X","subitem_source_identifier_type":"ISSN"}]},"item_5_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10097345","subitem_source_identifier_type":"NCID"}]},"item_5_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"電気通信大学"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"University of Electro-Communications"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"前川, 博"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Maekawa, Hiroshi","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-02-10"}],"displaytype":"detail","filename":"nalsp0021013.pdf","filesize":[{"value":"285.6 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"nalsp0021013.pdf","url":"https://jaxa.repo.nii.ac.jp/record/37750/files/nalsp0021013.pdf"},"version_id":"71c5784c-dfc9-4739-a814-271863286725"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"流体力学的不安定","subitem_subject_scheme":"Other"},{"subitem_subject":"絶対不安定","subitem_subject_scheme":"Other"},{"subitem_subject":"対流不安定","subitem_subject_scheme":"Other"},{"subitem_subject":"後流不安定","subitem_subject_scheme":"Other"},{"subitem_subject":"流体力学的カオス","subitem_subject_scheme":"Other"},{"subitem_subject":"乱雑化開始","subitem_subject_scheme":"Other"},{"subitem_subject":"乱流遷移","subitem_subject_scheme":"Other"},{"subitem_subject":"不安定流れ構造","subitem_subject_scheme":"Other"},{"subitem_subject":"速度変動源","subitem_subject_scheme":"Other"},{"subitem_subject":"外乱非線形増幅","subitem_subject_scheme":"Other"},{"subitem_subject":"直接数値シミュレーション","subitem_subject_scheme":"Other"},{"subitem_subject":"ナビエ・ストークス方程式数値解","subitem_subject_scheme":"Other"},{"subitem_subject":"擬スペクトル法","subitem_subject_scheme":"Other"},{"subitem_subject":"hydrodynamic instability","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"absolute instability","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"convective instability","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"wake instability","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"fluid dynamic chaos","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"randomization onset","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"transition to turbulence","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"unstable flow structure","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"velocity fluctuation source","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"nonlinear disturbance growth","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"direct numerical simulation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Navier-Stokes equations numerical solution","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"pseudospectral method","subitem_subject_language":"en","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":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"後流における絶対カオスと対流カオス","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"後流における絶対カオスと対流カオス"}]},"item_type_id":"5","owner":"1","path":["1891","1915"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"37750","relation_version_is_last":true,"title":["後流における絶対カオスと対流カオス"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T21:13:18.228161+00:00"}