{"created":"2023-03-31T02:07:00.932259+00:00","id":4913,"links":{},"metadata":{"_buckets":{"deposit":"7c804f06-a706-428a-b005-a0bba9af7852"},"_deposit":{"id":"4913","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"4913"},"status":"published"},"_oai":{"id":"oai:nied-repo.bosai.go.jp:00004913","sets":[]},"author_link":[],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1998","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"4","bibliographicPageEnd":"287","bibliographicPageStart":"279","bibliographicVolumeNumber":"17","bibliographic_titles":[{"bibliographic_title":"日本流体力学会誌「ながれ」","bibliographic_titleLang":"ja"},{"bibliographic_title":"Journal of Japan Society of Fluid Mechanics","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"2つの渦輪の切りつなぎ現象の機構を明らかにするために, 無限領域中の同一平面上に存在する等しい循環を持つ2つの渦輪の相互作用について, 差分法を用いて三次元ナビエーストークス方程式を解くことにより数値シミュレーションを行った.切りつなぎ現象が発生すると, 2つの渦輪の近接部で渦が消滅し, 一方, 渦が消滅する領域の両側でブリッジが出現して2つの渦輪を連結する.本論文においては, 渦度方程式の各項ごとの評価を行い, 切りつなぎ現象の支配的な要因を調べた.渦の消滅は, 渦度方程式の対流項によることがわかり, これは, 2つの渦輪の近接部に強い流れ場が存在することと一致した。ブリッジの生成については粘性項が支配的であり, 渦度が渦度分布の山と山, あるいは谷と谷の間に拡散して, 2つの渦輪の間にブリッジを生成するという機構が明らかになった.","subitem_description_language":"ja","subitem_description_type":"Other"},{"subitem_description":"In order to investigate the mechanism of “cut and connection” phenomenon of two vortex rings, interaction of two vortex rings with equivalent circulation on the same plane in infinite region is simulated by a finite difference method solving three-dimensional Navier-Stokes equation. As the “cut and connection” occurs, the vorticity disappears in the vicinity region of two vortex rings, while the bridge is produced and then two vortex rings are connected in both sides of the region where the vorticity is canceled. Each term of the vorticity equation was examined for investigating dominant factor in cut and connection phenomenon. We found following two results; the cancellation of vorticity is due to the convection term of the vortex equation and this result is consistent with the fact that there is intensified flow in the near region of vortex rings. It is observed that the viscous term is dominant factor for the bridging and the vorticity diffusion induced connecting both the peak values or the bottom values on the distribution of the vorticity, which yields forming the bridges between two vortex rings.","subitem_description_language":"en","subitem_description_type":"Other"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"社団法人 日本流体力学会","subitem_publisher_language":"ja"},{"subitem_publisher":"The Japan Society of Fluid Mechanics","subitem_publisher_language":"en"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.11426/nagare1982.17.279"}}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0286-3154","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"津代 久子","creatorNameLang":"ja"},{"creatorName":"TSUSHIRO Hisako","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"矢部 彰","creatorNameLang":"ja"},{"creatorName":"YABE Akira","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"吉澤 能政","creatorNameLang":"ja"},{"creatorName":"YOSHIZAWA Yoshimasa","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"笹本 明","creatorNameLang":"ja"},{"creatorName":"SASAMOTO Akira","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"バイ ブリチチゴ","creatorNameLang":"ja"},{"creatorName":"BAI Burtsitsig","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"今村 博","creatorNameLang":"ja"},{"creatorName":"IMAMURA Hiroshi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"木枝 香織","creatorNameLang":"ja"},{"creatorName":"KIEDA Kaori","creatorNameLang":"en"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_title":"２つの渦輪の切りつなぎ現象の発生機構","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"２つの渦輪の切りつなぎ現象の発生機構","subitem_title_language":"ja"},{"subitem_title":"Mechanism of \"Cut and Connection\" Phenomenon of Two Vortex Rings.","subitem_title_language":"en"}]},"item_type_id":"40001","owner":"1","path":["1670839190650"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2023-03-30"},"publish_date":"2023-03-30","publish_status":"0","recid":"4913","relation_version_is_last":true,"title":["２つの渦輪の切りつなぎ現象の発生機構"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-08T06:12:34.069363+00:00"}