{"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":"2026-08-05T15:41:03","modified_gmt":"2026-08-05T13:41:03","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\u00bb284424″ message_color_type=\u00a0\u00bbuncode-palette\u00a0\u00bb]Cette mise en lumi\u00e8re est bas\u00e9e sur les travaux de Christophe Prud’homme, Vincent Chabannes, Javier Cladellas, Pierre Alliez,<\/p>\n

Cette recherche a \u00e9t\u00e9 r\u00e9alis\u00e9e par le projet Exa-MA, en collaboration avec le CoE HiDALGO2, et les projets Ktirio & CGAL. 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\u00bb137944″]Comment mod\u00e9liser une ville enti\u00e8re pour mieux comprendre sa dynamique \u00e9nerg\u00e9tique, a\u00e9raulique et thermique ? Les donn\u00e9es urbaines sont abondantes – b\u00e2timents, routes, terrain, v\u00e9g\u00e9tation – mais souvent incoh\u00e9rentes ou incompl\u00e8tes. Un nouveau pipeline de maillage SIG permet d\u00e9sormais de g\u00e9n\u00e9rer automatiquement des mod\u00e8les de ville \u00e9tanches et pr\u00eats \u00e0 \u00eatre simul\u00e9s, permettant des simulations \u00e9nerg\u00e9tiques et microclimatiques r\u00e9alistes \u00e0 l’\u00e9chelle urbaine. <\/strong><\/p>\n

[\/vc_column_text][vc_column_text uncode_shortcode_id=\u00a0\u00bb115592″]La mod\u00e9lisation de l’\u00e9nergie urbaine, du vent et de la chaleur n\u00e9cessite des g\u00e9om\u00e9tries ferm\u00e9es et coh\u00e9rentes, alors que les donn\u00e9es disponibles (b\u00e2timents, routes, terrain, hydrographie, v\u00e9g\u00e9tation) sont h\u00e9t\u00e9rog\u00e8nes et souvent non \u00e9tanches. L’objectif est donc de reconstruire des maillages urbains \u00e9tanches \u00e0 LoD-0\/1, interop\u00e9rables et enrichis d’attributs physiques et de mod\u00e8les. <\/p>\n

Un pipeline SIG-maillage a \u00e9t\u00e9 d\u00e9velopp\u00e9 pour automatiser la g\u00e9n\u00e9ration de mod\u00e8les urbains ferm\u00e9s. Il int\u00e8gre l’ingestion de donn\u00e9es via Mapbox, des op\u00e9rations g\u00e9om\u00e9triques robustes utilisant Ktirio-Geom (bas\u00e9 sur CGAL), ainsi que des bool\u00e9ens multicouches assurant la fermeture topologique des sc\u00e8nes. Des zones urbaines couvrant plusieurs kilom\u00e8tres carr\u00e9s sont ainsi converties en mod\u00e8les solides LoD-1\/2 coh\u00e9rents (b\u00e2timents, routes, terrain, rivi\u00e8res, v\u00e9g\u00e9tation). Le temps de pr\u00e9paration des mod\u00e8les est r\u00e9duit de plusieurs semaines \u00e0 quelques minutes, avec un gain significatif de stabilit\u00e9 num\u00e9rique. <\/p>\n

Les r\u00e9sultats sont interop\u00e9rables avec le mod\u00e8le de b\u00e2timent urbain (Ktirio-UBM) et compatibles avec les solveurs d’\u00e9nergie et de CFD.<\/p>\n

Ce d\u00e9veloppement permet un acc\u00e8s rapide \u00e0 des cas urbains r\u00e9alistes, utilisables pour des simulations \u00e9nerg\u00e9tiques et microclimatiques, tout en favorisant le partage de jeux de donn\u00e9es au sein de l’\u00e9cosyst\u00e8me du Centre d’excellence Hidalgo\u00b2.
L’\u00e9tape suivante consiste \u00e0 publier des jeux de donn\u00e9es de r\u00e9f\u00e9rence – mod\u00e8les \u00e9tanches et scripts associ\u00e9s – sur la plateforme CKAN (n.hidalgo2.eu). Ces travaux ouvrent la voie au couplage entre CFD et simulation \u00e9nerg\u00e9tique, et \u00e0 la cr\u00e9ation d’outils d\u00e9di\u00e9s \u00e0 l’\u00e9tude et \u00e0 la r\u00e9duction des \u00eelots de chaleur urbains.<\/p>\n

[\/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\u00bb113227″]Chiffres : Reconstruction de la ville de Grenoble dans un rayon de 5 km, y compris le r\u00e9seau routier, les rivi\u00e8res et les plans d’eau. La v\u00e9g\u00e9tation n’a pas \u00e9t\u00e9 incluse afin de r\u00e9duire la taille du maillage, qui comprend ici environ 6 millions de triangles – un chiffre qui doublerait au moins si la v\u00e9g\u00e9tation \u00e9tait incluse.
\nPEPR 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\u00bb284424″ message_color_type=\u00a0\u00bbuncode-palette\u00a0\u00bb]Cette mise en lumi\u00e8re est bas\u00e9e sur les travaux de Christophe Prud’homme, Vincent Chabannes, Javier Cladellas, […]<\/p>\n","protected":false},"author":14,"featured_media":2485,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"iawp_total_views":17,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[30,31],"tags":[],"class_list":["post-2490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","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 - 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