{"_buckets": {"deposit": "83b9b270-d14c-414d-b6e4-e71211e333a6"}, "_deposit": {"created_by": 1, "id": "6576", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "6576"}, "status": "published"}, "_oai": {"id": "oai:jaxa.repo.nii.ac.jp:00006576", "sets": ["1083", "1891"]}, "author_link": ["33624", "33626", "33620", "33622", "33623", "33625", "33621", "33627"], "item_5_alternative_title_2": {"attribute_name": "その他のタイトル（英）", "attribute_value_mlt": [{"subitem_alternative_title": "Discussions on the methods of vortical structure identification"}]}, "item_5_biblio_info_10": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2005-01-28", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "78", "bibliographicPageStart": "75", "bibliographicVolumeNumber": "JAXA-SP-04-002", "bibliographic_titles": [{"bibliographic_title": "宇宙航空研究開発機構特別資料: 境界層遷移の解明と制御研究会講演論文集　第33回・第34回"}, {"bibliographic_title": "JAXA Special Publication: Proceedings of the 33rd and 34th JAXA Workshops on Investigation and Control of Boundary-Layer Transition", "bibliographic_titleLang": "en"}]}]}, "item_5_description_17": {"attribute_name": "抄録（英）", "attribute_value_mlt": [{"subitem_description": "A new method of vortical structure identification, named pi method, is proposed. The method focuses on the relation between the vorticity vector and the rotating condition of its neighboring fluid. The results are compared with the other methods, namely the Q method, the lambda(sub 2) method and the Delata method, using the DNS data of a forced isotropic homogeneous turbulence and a collision of four vortex rings. 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