{"id":1730,"date":"2017-11-13T09:33:09","date_gmt":"2017-11-13T00:33:09","guid":{"rendered":"http:\/\/www.eri.u-tokyo.ac.jp\/en\/?p=1730"},"modified":"2017-11-13T09:46:56","modified_gmt":"2017-11-13T00:46:56","slug":"grain-growth-prediction-based-on-data-assimilation-by-implementing-4dvar-on-multi-phase-field-model","status":"publish","type":"post","link":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/research\/1730\/","title":{"rendered":"Grain growth prediction based on data assimilation by implementing 4DVar on multi-phase-field model"},"content":{"rendered":"<p style=\"text-align: center\">Shin-ichi Ito<sub>a<\/sub>, Hiromichi Nagao<sub>a,b<\/sub>, Tadashi Kasuya<sub>c<\/sub> and Junya Inoue<sub>c,d<\/sub><br \/>\n<sub><sup>a<\/sup>Earthquake Research Institute, The University of Tokyo, Tokyo, Japan;<\/sub><br \/>\n<sub><sup>b<\/sup>Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan;<\/sub><br \/>\n<sub><sup>c<\/sup>Graduate School of Engineering, The University of Tokyo, Tokyo, Japan;<\/sub><br \/>\n<sub><sup>d<\/sup>Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan<\/sub><\/p>\n<p style=\"text-align: center\">Science and Technology of Advanced Materials, 18:1, 857-869 <a href=\"http:\/\/dx.doi.org\/10.1080\/14686996.2017.1378921\">http:\/\/dx.doi.org\/10.1080\/14686996.2017.1378921<\/a><\/p>\n<p style=\"text-align: left\"><strong>ABSTRACT<\/strong><br \/>\nWe propose a method to predict grain growth based on data assimilation by using a fourdimensional variational method (4DVar). When implemented on a multi-phase-field model, the proposed method allows us to calculate the predicted grain structures and uncertainties in them that depend on the quality and quantity of the observational data. We confirm through numerical tests involving synthetic data that the proposed method correctly reproduces the true phase-field assumed in advance. Furthermore, it successfully quantifies uncertainties in the predicted grain structures, where such uncertainty quantifications provide valuable information to optimize the experimental design.<\/p>\n<p style=\"text-align: left\"><a href=\"http:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2017\/11\/c2a1cb42f063f0b1310924f6588fa1b2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-1731\" src=\"http:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2017\/11\/c2a1cb42f063f0b1310924f6588fa1b2-1024x482.jpg\" alt=\"\" width=\"840\" height=\"395\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Shin-ichi Itoa, Hiromichi Nagaoa,b, Tadashi Kasuyac and Junya Inouec,d aEarthquake Research Institute, The Uni &hellip; <a href=\"https:\/\/www.eri.u-tokyo.ac.jp\/en\/research\/1730\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Grain growth prediction based on data assimilation by implementing 4DVar on multi-phase-field model&#8221;<\/span><\/a><\/p>\n","protected":false},"author":9,"featured_media":1733,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1730","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"_links":{"self":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/1730"}],"collection":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/comments?post=1730"}],"version-history":[{"count":1,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/1730\/revisions"}],"predecessor-version":[{"id":1732,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/1730\/revisions\/1732"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media\/1733"}],"wp:attachment":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media?parent=1730"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/categories?post=1730"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/tags?post=1730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}