{"id":2490,"date":"2025-10-28T11:56:44","date_gmt":"2025-10-28T10:56:44","guid":{"rendered":"https:\/\/numpex.org\/des-donnees-urbaines-aux-maillages-multicouches-etanches-prets-pour-la-simulation-energetique-a-lechelle-de-la-ville\/"},"modified":"2025-11-03T09:20:52","modified_gmt":"2025-11-03T08:20:52","slug":"des-donnees-urbaines-aux-maillages-multicouches-etanches-prets-pour-la-simulation-energetique-a-lechelle-de-la-ville","status":"publish","type":"post","link":"https:\/\/numpex.org\/fr\/des-donnees-urbaines-aux-maillages-multicouches-etanches-prets-pour-la-simulation-energetique-a-lechelle-de-la-ville\/","title":{"rendered":"Des donn\u00e9es urbaines aux maillages multicouches \u00e9tanches, pr\u00eats pour la simulation \u00e9nerg\u00e9tique \u00e0 l’\u00e9chelle de la ville"},"content":{"rendered":"

[vc_row][vc_column width=\u00a0\u00bb1\/1″][vc_message message_color=\u00a0\u00bbcolor-vyce\u00a0\u00bb uncode_shortcode_id=\u00a0\u00bb193477″ message_color_type=\u00a0\u00bbuncode-palette\u00a0\u00bb]Cette recherche a \u00e9t\u00e9 r\u00e9alis\u00e9e dans le cadre du projet Exa-MA. Retrouvez toutes les informations sur Exa-MA ici<\/a>.<\/p>\n

[\/vc_message][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text uncode_shortcode_id=\u00a0\u00bb371509″]Comment mod\u00e9liser une ville enti\u00e8re afin de mieux comprendre sa dynamique \u00e9nerg\u00e9tique, ses flux d’air et sa dynamique thermique ? Les donn\u00e9es urbaines (b\u00e2timents, routes, terrain, v\u00e9g\u00e9tation) sont abondantes mais souvent incoh\u00e9rentes ou incompl\u00e8tes. Un nouveau pipeline de maillage SIG permet d\u00e9sormais de g\u00e9n\u00e9rer automatiquement des mod\u00e8les urbains \u00e9tanches et pr\u00eats \u00e0 \u00eatre simul\u00e9s, ce qui permet des simulations r\u00e9alistes de l’\u00e9nergie et du microclimat \u00e0 l’\u00e9chelle urbaine.<\/strong>[\/vc_column_text][vc_column_text uncode_shortcode_id=\u00a0\u00bb133532″]La mod\u00e9lisation \u00e9nergie\/vent\/chaleur urbaine requiert des g\u00e9om\u00e9tries ferm\u00e9es et coh\u00e9rentes, alors que les donn\u00e9es (b\u00e2timents, voirie, relief, hydro, v\u00e9g\u00e9tation) sont h\u00e9t\u00e9rog\u00e8nes et souvent non \u00e9tanches. L\u2019objectif est donc de reconstruire des maillages urbains watedight LoD-0\/1, interop\u00e9rables et enrichis d’attributs et mod\u00e8les physiques.<\/p>\n

Un pipeline SIG\u2013maillage a \u00e9t\u00e9 d\u00e9velopp\u00e9 pour automatiser la g\u00e9n\u00e9ration de mod\u00e8les urbains ferm\u00e9s. Il int\u00e8gre l\u2019ingestion des donn\u00e9es via Mapbox, des op\u00e9rations g\u00e9om\u00e9triques robustes \u00e0 l\u2019aide de Ktirio-Geom (bas\u00e9 sur CGAL), ainsi que des bool\u00e9ens multi-couches garantissant la fermeture topologique des sc\u00e8nes. Les zones urbaines de plusieurs kilom\u00e8tres carr\u00e9s sont ainsi converties en solides coh\u00e9rents LoD-1\/2 (b\u00e2timents, routes, terrain, rivi\u00e8res, v\u00e9g\u00e9tation). Le temps de pr\u00e9paration des mod\u00e8les passe de plusieurs semaines \u00e0 quelques minutes, avec un gain significatif en stabilit\u00e9 num\u00e9rique. Les sorties sont interop\u00e9rables avec le mod\u00e8le Urban Building Model (Ktirio-UBM) et compatibles avec les solveurs \u00e9nerg\u00e9tiques et CFD.<\/p>\n

Ce d\u00e9veloppement permet un acc\u00e8s rapide \u00e0 des cas urbains r\u00e9alistes, exploitables pour les simulations \u00e9nerg\u00e9tiques et microclimatiques, tout en favorisant la mutualisation des jeux de donn\u00e9es au sein de l\u2019\u00e9cosyst\u00e8me du Centre of Excellence Hidalgo\u00b2.<\/p>\n

La prochaine \u00e9tape consiste \u00e0 publier des jeux de donn\u00e9es de r\u00e9f\u00e9rence \u2014 mod\u00e8les watertight et scripts associ\u00e9s \u2014 sur la plateforme CKAN (n.hidalgo2.eu). Ces travaux ouvrent la voie au couplage entre simulation CFD et \u00e9nerg\u00e9tique, et \u00e0 la cr\u00e9ation d\u2019outils d\u00e9di\u00e9s \u00e0 l\u2019\u00e9tude et \u00e0 la r\u00e9duction des \u00eelots de chaleur urbains.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=\u00a0\u00bb1\/1″][vc_gallery el_id=\u00a0\u00bbgallery-211976″ medias=\u00a0\u00bb2485,2489″ gutter_size=\u00a0\u00bb3″ single_overlay_opacity=\u00a0\u00bb50″ single_padding=\u00a0\u00bb2″ uncode_shortcode_id=\u00a0\u00bb180472″][vc_column_text uncode_shortcode_id=\u00a0\u00bb170588″]Figures: Reconstruction de la ville de Grenoble sur un rayon de 5 km, incluant le r\u00e9seau routier, les rivi\u00e8res et les \u00e9tendues d\u2019eau. La v\u00e9g\u00e9tation n\u2019a pas \u00e9t\u00e9 int\u00e9gr\u00e9e afin de r\u00e9duire la taille du maillage, qui compte ici environ 6 millions de triangles \u2014 un chiffre qui serait au moins doubl\u00e9 si la v\u00e9g\u00e9tation \u00e9tait incluse.
\n\u00a9 PEPR NumPEx
\n<\/em><\/p>\n

[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

[vc_row][vc_column width=\u00a0\u00bb1\/1″][vc_message message_color=\u00a0\u00bbcolor-vyce\u00a0\u00bb uncode_shortcode_id=\u00a0\u00bb193477″ message_color_type=\u00a0\u00bbuncode-palette\u00a0\u00bb]Cette recherche a \u00e9t\u00e9 r\u00e9alis\u00e9e dans le cadre du projet Exa-MA. Retrouvez toutes les informations sur […]<\/p>\n","protected":false},"author":14,"featured_media":2485,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":17,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[17,30,31],"tags":[],"class_list":["post-2490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-essentiels","category-exa-ma","category-nouvelles"],"yoast_head":"\nDes donn\u00e9es urbaines aux maillages multicouches \u00e9tanches, pr\u00eats pour la simulation \u00e9nerg\u00e9tique \u00e0 l'\u00e9chelle de la ville - NumPEx<\/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:\/\/numpex.org\/fr\/des-donnees-urbaines-aux-maillages-multicouches-etanches-prets-pour-la-simulation-energetique-a-lechelle-de-la-ville\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Des donn\u00e9es urbaines aux maillages multicouches \u00e9tanches, pr\u00eats pour la simulation \u00e9nerg\u00e9tique \u00e0 l'\u00e9chelle de la ville - NumPEx\" \/>\n<meta property=\"og:description\" content=\"[vc_row][vc_column width=\u00a0\u00bb1\/1″][vc_message message_color=\u00a0\u00bbcolor-vyce\u00a0\u00bb uncode_shortcode_id=\u00a0\u00bb193477″ message_color_type=\u00a0\u00bbuncode-palette\u00a0\u00bb]Cette recherche a \u00e9t\u00e9 r\u00e9alis\u00e9e dans le cadre du projet Exa-MA. 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