{"id":196717,"date":"2025-06-12T13:40:05","date_gmt":"2025-06-12T13:40:05","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/knowledge\/?post_type=topic&#038;p=196717"},"modified":"2025-08-04T09:31:19","modified_gmt":"2025-08-04T09:31:19","slug":"body-of-influence-boi-in-ansys-discovery","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/body-of-influence-boi-in-ansys-discovery\/","title":{"rendered":"Body Of Influence (BoI) in Ansys Discovery"},"content":{"rendered":"<p><strong>Body of Influence in Ansys Discovery 2025R2<\/strong> provides flexible mesh control by allowing you to locally control mesh size in specific regions of your geometry. It enables more refined meshing around critical areas while maintaining coarser mesh in less important regions.<\/p>\n<p>In the following video, we will explore how to create and implement BOI for external fluid flow analysis on an Ahmed body. We will also demonstrate how to set up multiple bodies of influence with different local sizing settings to optimize your simulation mesh.<\/p>\n<p><iframe loading=\"lazy\" class=\"vidyard_iframe\" src=\"\/\/play.vidyard.com\/njfrYrPuu99rYqGzZdQpC6.html?\" width=\"640\" height=\"360\" frameborder=\"0\"><\/iframe><\/p>\n<hr \/>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-196942\" src=\"https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/06\/BoI_AIS_Tile_AOS-300x237.png\" alt=\"\" width=\"300\" height=\"237\" srcset=\"https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/06\/BoI_AIS_Tile_AOS-300x237.png 300w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/06\/BoI_AIS_Tile_AOS-768x608.png 768w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/06\/BoI_AIS_Tile_AOS-24x19.png 24w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/06\/BoI_AIS_Tile_AOS-36x28.png 36w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/06\/BoI_AIS_Tile_AOS-48x38.png 48w, https:\/\/innovationspace.ansys.com\/knowledge\/wp-content\/uploads\/sites\/4\/2025\/06\/BoI_AIS_Tile_AOS.png 1007w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n","protected":false},"template":"","class_list":["post-196717","topic","type-topic","status-publish","hentry","topic-tag-body-of-influence","topic-tag-boi","topic-tag-fluid-flow-analysis","topic-tag-gpu-resource-management","topic-tag-local-sizing","topic-tag-memory-management","topic-tag-mesh-control","filter-by-application-discovery","filter-by-application-discovery-explore","filter-by-application-discovery-refine"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Body of Influence in Ansys Discovery 2025R2 provides flexible mesh control by allowing you to locally control mesh size in specific regions of your geometry. 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