{"id":6272,"date":"2023-12-06T11:56:43","date_gmt":"2023-12-06T10:56:43","guid":{"rendered":"https:\/\/www.mines-stetienne.fr\/lgf\/?p=6272"},"modified":"2023-12-06T11:57:08","modified_gmt":"2023-12-06T10:57:08","slug":"soutenance-de-these-clara-aydar-14-decembre-2023","status":"publish","type":"post","link":"https:\/\/www.mines-stetienne.fr\/lgf\/soutenance-de-these-clara-aydar-14-decembre-2023\/","title":{"rendered":"Soutenance de th\u00e8se \u2013 Clara Aydar \u2013 14 d\u00e9cembre 2023"},"content":{"rendered":"\n<p>Clara Aydar soutiendra sa th\u00e8se intitul\u00e9e \u00ab Vers la simulation DEM en temps r\u00e9el des \u00e9coulements granulaires. Application au transfert de chaleur dans les proc\u00e9d\u00e9s industriels \u00bb le 14 d\u00e9cembre \u00e0 10h dans l\u2019amphith\u00e9\u00e2tre F1 du b\u00e2timent principal de l\u2019\u00c9cole des mines de Saint-\u00c9tienne (158 cours Fauriel 42100 Saint-\u00c9tienne).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jury<\/h2>\n\n\n\n<p>Jean-S\u00e9bastien KROLL-RABOTIN, Ma\u00eetre de conf\u00e9rences HDR, \u00c9cole des Mines de Nancy (Rapporteur)<br>Thomas LICHTENEGGER, Ma\u00eetre de conf\u00e9rences HDR, Universit\u00e9 Johannes Kepler Linz, Autriche (Rapporteur)<br>Nouria FATAH, Professeure, \u00c9cole Centrale de Lille (Examinatrice)<br>Mohammed GUESSASMA, Professeur, Universit\u00e9 de Picardie Jules Verne (Examinateur)<br>Abibatou NDIAYE, Docteure, Orano (Invit\u00e9e)<br>Olivier BONNEFOY, Professeur, Mines Saint-\u00c9tienne (Directeur de th\u00e8se)<br>Sylvain MARTIN, Ma\u00eetre assistant, Mines Saint-Etienne (Encadrant)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00e9sum\u00e9<\/h2>\n\n\n\n<p>Les \u00e9coulements granulaires sont pr\u00e9sents dans de nombreux proc\u00e9d\u00e9s industriels et naturels. Pour \u00e9tudier ces \u00e9coulements, nous utilisons la M\u00e9thode des \u00c9l\u00e9ments Discrets (DEM) qui, malgr\u00e9 les progr\u00e8s informatiques conduisent \u00e0 des simulations co\u00fbteuses en termes de temps de calcul.<\/p>\n\n\n\n<p>Dans ce contexte, nous proposons une nouvelle m\u00e9thode ayant pour but la r\u00e9duction significative du temps de calcul. L&#8217;id\u00e9e principale est d&#8217;\u00e9tendre une approche existante bas\u00e9e sur la pseudo-p\u00e9riodicit\u00e9 des proc\u00e9d\u00e9s. Apr\u00e8s une courte simulation DEM (quelques p\u00e9riodes), les r\u00e9sultats sont extrapol\u00e9s aux temps longs.<\/p>\n\n\n\n<p>Cette approche permet de mod\u00e9liser les transferts de chaleur dans les simulations DEM (sans fluide interstitiel) et CFD-DEM (avec fluide interstitiel). L&#8217;algorithme d&#8217;extrapolation que nous avons d\u00e9velopp\u00e9 prend en charge deux types de transfert de chaleur: conductif et convectif. Il pourra \u00eatre \u00e9tendu au transfert par rayonnement ainsi qu&#8217;\u00e0 d&#8217;autres ph\u00e9nom\u00e8nes de transport tels que le transport de constituants chimiques.<br>Nous avons d&#8217;abord valid\u00e9 notre m\u00e9thode en mod\u00e9lisant un tambour tournant pour \u00e9valuer le transfert de chaleur par conduction. Ensuite, nous avons \u00e9tudi\u00e9 le transfert de chaleur mixte conductif-convectif dans un lit \u00e0 jet. Nos r\u00e9sultats extrapol\u00e9s sont en excellent accord avec les r\u00e9sultats de la simulation standard (erreur de moins de 3%) et une diminution drastique du temps de simulation (facteur 100).<\/p>\n\n\n\n<p>Ce travail constitue un premier pas vers la simulation num\u00e9rique \u00e0 faible co\u00fbt des proc\u00e9d\u00e9s industriels \u00e0 grande \u00e9chelle. Notre objectif ultime est de parvenir \u00e0 une m\u00e9thode de simulation rapide, applicable macroscopiquement, pour \u00e9tudier tous types d&#8217;\u00e9coulements r\u00e9actifs granulaires comme dans des fours tournants, m\u00e9langeurs et lits fluidis\u00e9s.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Clara Aydar soutiendra sa th\u00e8se intitul\u00e9e \u00ab Vers la simulation DEM en temps r\u00e9el des \u00e9coulements granulaires. Application au transfert de chaleur dans les proc\u00e9d\u00e9s industriels \u00bb le 14 d\u00e9cembre \u00e0 10h dans l\u2019amphith\u00e9\u00e2tre F1 du b\u00e2timent principal de l\u2019\u00c9cole des mines de Saint-\u00c9tienne (158 cours Fauriel 42100 Saint-\u00c9tienne). Jury Jean-S\u00e9bastien KROLL-RABOTIN, Ma\u00eetre de conf\u00e9rences&hellip;<\/p>\n","protected":false},"author":1474,"featured_media":6273,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"6213,6229,5990,5954,6248,6167","_relevanssi_noindex_reason":"","footnotes":""},"categories":[21],"tags":[35],"post_series":[],"class_list":["post-6272","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-slide-home","entry","has-media"],"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","pp_force_visibility":null,"pp_subpost_visibility":null,"pp_inherited_force_visibility":null,"pp_inherited_subpost_visibility":null,"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Soutenance de th\u00e8se \u2013 Clara Aydar \u2013 14 d\u00e9cembre 2023 - Laboratoire Georges Friedel<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mines-stetienne.fr\/lgf\/soutenance-de-these-clara-aydar-14-decembre-2023\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Soutenance de th\u00e8se \u2013 Clara Aydar \u2013 14 d\u00e9cembre 2023 - Laboratoire Georges Friedel\" \/>\n<meta property=\"og:description\" content=\"Clara Aydar soutiendra sa th\u00e8se intitul\u00e9e \u00ab Vers la simulation DEM en temps r\u00e9el des \u00e9coulements granulaires. 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