{"_buckets": {"deposit": "d0100bdb-e531-43d8-a723-e3a23db4b50c"}, "_deposit": {"id": "2006984", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "2006984"}, "status": "published"}, "_oai": {"id": "oai:u-ryukyu.repo.nii.ac.jp:02006984", "sets": ["1642837999752", "1642838406414"]}, "author_link": [], "item_1617186331708": {"attribute_name": "Title", "attribute_value_mlt": [{"subitem_1551255647225": "Observation on the Vortex Rings", "subitem_1551255648112": "en"}]}, "item_1617186419668": {"attribute_name": "Creator", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Igei, Ryokan", "creatorNameLang": "en"}]}]}, "item_1617186476635": {"attribute_name": "Access Rights", "attribute_value_mlt": [{"subitem_1522299639480": "open access", "subitem_1600958577026": "http://purl.org/coar/access_right/c_abf2"}]}, "item_1617186626617": {"attribute_name": "Description", "attribute_value_mlt": [{"subitem_description": "Observation was made on the vortex rings produced by ejecting dyed water into transparent water from a circular orifice of a glass tube of 0.75 cm in diameter. The translational velocity of the ring at the eight-diameter distance (6.0 cm) was used for the calculation of the Reynolds number. First, the graphs of the translational velocity vs. distance traveled by the ring plotted on semi -log paper indicate that in the later stage of the motion there exists an exponential type of dependence of the velocity on the distance, v\" - exp ( - k y), the value of k depending on the Reynolds number, with k decreasing as the Reynolds number increases. Next, from the relation between the velocity and time elapsed plotted on log-log paper, it is found that when the power law approximation, v - t ^\u003c-b\u003e, is adopted for the later part of the motion, the value of bapproximately equals to 1 for each ring regardless the Reynolds number. Finally, our result suggeststs a linear relationship between the maximum distance traveled by the ring before its breakdown and the Reynolds number.", "subitem_description_type": "Other"}, {"subitem_description": "\u7d00\u8981\u8ad6\u6587", "subitem_description_type": "Other"}]}, "item_1617186643794": {"attribute_name": "Publisher", "attribute_value_mlt": [{"subitem_1522300295150": "ja", "subitem_1522300316516": "\u7409\u7403\u5927\u5b66\u7406\u5de5\u5b66\u90e8"}, {"subitem_1522300295150": "en", "subitem_1522300316516": "Science and Engineering Division, University of the Ryukyus"}]}, "item_1617186702042": {"attribute_name": "Language", "attribute_value_mlt": [{"subitem_1551255818386": "eng"}]}, "item_1617186783814": {"attribute_name": "Identifier", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", "subitem_identifier_uri": "http://hdl.handle.net/20.500.12000/23529"}]}, "item_1617186920753": {"attribute_name": "Source Identifier", "attribute_value_mlt": [{"subitem_1522646500366": "NCID", "subitem_1522646572813": "AN0025080X"}]}, "item_1617186941041": {"attribute_name": "Source Title", "attribute_value_mlt": [{"subitem_1522650068558": "ja", "subitem_1522650091861": "\u7409\u7403\u5927\u5b66\u7406\u5de5\u5b66\u90e8\u7d00\u8981. \u7406\u5b66\u7de8"}, {"subitem_1522650068558": "en", "subitem_1522650091861": "Bulletin of Science \u0026 Engineering Division, University of Ryukyus. Mathematics \u0026 natural sciences"}]}, "item_1617187056579": {"attribute_name": "Bibliographic Information", "attribute_value_mlt": [{"bibliographicIssueNumber": "20", "bibliographicPageEnd": "22", "bibliographicPageStart": "15"}]}, "item_1617258105262": {"attribute_name": "Resource Type", "attribute_value_mlt": [{"resourcetype": "departmental bulletin paper", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_1617265215918": {"attribute_name": "Version Type", "attribute_value_mlt": [{"subitem_1522305645492": "NA", "subitem_1600292170262": "http://purl.org/coar/version/c_be7fb7dd8ff6fe43"}]}, "item_1617605131499": {"attribute_name": "File", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "download_preview_message": "", "file_order": 0, "filename": "No20p015.pdf", "future_date_message": "", "is_thumbnail": false, "mimetype": "", "size": 0, "url": {"objectType": "fulltext", "url": "https://u-ryukyu.repo.nii.ac.jp/record/2006984/files/No20p015.pdf"}, "version_id": "364757eb-bce2-47fb-9d7e-06f3f934972f"}]}, "item_title": "Observation on the Vortex Rings", "item_type_id": "15", "owner": "1", "path": ["1642837999752", "1642838406414"], "permalink_uri": "http://hdl.handle.net/20.500.12000/23529", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2012-02-28"}, "publish_date": "2012-02-28", "publish_status": "0", "recid": "2006984", "relation": {}, "relation_version_is_last": true, "title": ["Observation on the Vortex Rings"], "weko_shared_id": -1}