{"metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00227820","sets":["1164:2240:11176:11333"]},"path":["11333"],"owner":"44499","recid":"227820","title":["圧縮性乱流直接数値シミュレーションコードの3軸並列化とその評価"],"pubdate":{"attribute_name":"公開日","attribute_value":"2023-09-19"},"_buckets":{"deposit":"ca15772b-c234-434d-b118-f8a10815fc99"},"_deposit":{"id":"227820","pid":{"type":"depid","value":"227820","revision_id":0},"owners":[44499],"status":"published","created_by":44499},"item_title":"圧縮性乱流直接数値シミュレーションコードの3軸並列化とその評価","author_link":["607421","607417","607420","607418","607419"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"圧縮性乱流直接数値シミュレーションコードの3軸並列化とその評価"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"高性能計算","subitem_subject_scheme":"Other"}]},"item_type_id":"4","publish_date":"2023-09-19","item_4_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"神戸大学大学院システム情報学研究科"},{"subitem_text_value":"神戸大学大学院システム情報学研究科"},{"subitem_text_value":"神戸大学大学院システム情報学研究科"},{"subitem_text_value":"横浜国立大学大学院環境情報研究院"},{"subitem_text_value":"岡山大学大学院環境生命科学研究科"}]},"item_4_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"Graduate school of System Informatics, Kobe University","subitem_text_language":"en"},{"subitem_text_value":"Graduate school of System Informatics, Kobe University","subitem_text_language":"en"},{"subitem_text_value":"Graduate school of System Informatics, Kobe University","subitem_text_language":"en"},{"subitem_text_value":"Graduate school of Environment and Information Sciences, Yokohama National University","subitem_text_language":"en"},{"subitem_text_value":"Graduate school of Environmental and Life Science, Okayama University","subitem_text_language":"en"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_publisher":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"情報処理学会","subitem_publisher_language":"ja"}]},"publish_status":"0","weko_shared_id":-1,"item_file_price":{"attribute_name":"Billing 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泰生"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"竹上, 諒"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"横川, 三津夫"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"櫻井, 幹記"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"石原, 卓"}],"nameIdentifiers":[{}]}]},"item_4_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10463942","subitem_source_identifier_type":"NCID"}]},"item_4_textarea_12":{"attribute_name":"Notice","attribute_value_mlt":[{"subitem_textarea_value":"SIG Technical Reports are nonrefereed and hence may later appear in any journals, conferences, symposia, etc."}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourceuri":"http://purl.org/coar/resource_type/c_18gh","resourcetype":"technical report"}]},"item_4_source_id_11":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2188-8841","subitem_source_identifier_type":"ISSN"}]},"item_4_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"スーパーコンピュータを用いた乱流の直接数値シミュレーション (DNS) は自然現象や科学技術の諸問題解決のために広く用いられている．大規模な DNS をおこなう際，格子点数の増加により実行時間が膨大になる問題がある．一方，プロセス並列実行をするにあたり，計算領域を 3 軸で分割することで，2 軸で分割した場合より並列度を大きくすることができ，超並列計算機システムでの実行が可能となる．本研究では，等温条件下の圧縮性乱流の有限差分法に基づく DNS に対して，3 軸並列化を施した DNS コードを新たに開発し，スーパーコンピュータ「不老」上で領域分割数やプロセス並列数を変化させ，その実行性能の評価をおこなった．また，従来使用していた 2 軸並列の DNS コードとの実行時間の比較をおこなった．その結果，格子点数 5123 の DNS に対し，16 ノード 256 プロセス並列で従来コードと比べて 1.57 倍高速に実行できることがわかった．また，適切な分割数で 3 軸並列化を行うことで更なる高速化が見込めることがわかった．","subitem_description_type":"Other"}]},"item_4_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"7","bibliographic_titles":[{"bibliographic_title":"研究報告ハイパフォーマンスコンピューティング（HPC）"}],"bibliographicPageStart":"1","bibliographicIssueDates":{"bibliographicIssueDate":"2023-09-19","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"8","bibliographicVolumeNumber":"2023-HPC-191"}]},"relation_version_is_last":true,"weko_creator_id":"44499"},"id":227820,"updated":"2025-01-19T12:03:06.990945+00:00","links":{},"created":"2025-01-19T01:27:04.329827+00:00"}