{"id":441611,"date":"2025-09-17T11:27:53","date_gmt":"2025-09-17T11:27:53","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-meshing-error-when-dsco-not-stp\/"},"modified":"2025-09-17T11:27:53","modified_gmt":"2025-09-17T11:27:53","slug":"fluent-meshing-error-when-dsco-not-stp","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-meshing-error-when-dsco-not-stp\/","title":{"rendered":"Fluent Meshing Error when .dsco not .stp"},"content":{"rendered":"<p>&lt;p&gt;Hi all,&lt;br&gt;&lt;br&gt;UPDATE: Why does meshing work when the geometry is saved as .stp and not when in native .dsco\/.pmdb\/.scdoc\/.agdb ??&lt;br&gt;&lt;br&gt;&#8212;&lt;br&gt;&lt;br&gt;I&rsquo;m struggling to create even a coarse surface mesh in Fluent Meshing for what should be a straightforward case: half a wing in axial flow inside a symmetric cuboidal (wide) domain. I&rsquo;ve meshed more complex geometries before without issues, so this one has me stumped.&lt;br&gt;&lt;br&gt;Geometry &amp; setup:&lt;br&gt;* Created entirely in ANSYS Discovery (no imports).&lt;br&gt;* Wing trailing edge deliberately blunted to avoid zero-thickness.&lt;br&gt;* Airfoil\/wing faces ensured to be single continuous surfaces (no fragmented profiles).&lt;br&gt;* Domain is a simple box; half-model with a symmetry plane.&lt;br&gt;* Using Fluent Meshing (Watertight workflow and manual steps both attempted).&lt;br&gt;&lt;br&gt;What I&rsquo;ve tried:&lt;br&gt;* Discovery Repair: reports no problems.&lt;br&gt;* Fluent Meshing Geometry Check: no errors or warnings.&lt;br&gt;* Tried very coarse global sizing, relaxed curvature\/proximity, max cell size on all faces.&lt;br&gt;* Ensured no free edges, duplicates, or tiny sliver faces as far as the tools report.&lt;br&gt;&lt;br&gt;The problem:&lt;br&gt;* The surface mesh generation fails every time, even with extremely coarse settings.&lt;br&gt;* I consistently get errors such as &#8220;Breakout detected&#8221; and &#8220;Front could not be closed&#8221; at the tip during surface meshing.&lt;br&gt;* No preceding geometry\/health warnings to point at a root cause.&lt;br&gt;&lt;br&gt;Question:&lt;br&gt;Is there a preferred export route from Discovery for Fluent Meshing?&lt;br&gt;&lt;br&gt;Happy to provide the files for you to try it out and give out any additional details. I&rsquo;ve been at this for a few weeks and find it odd given the simplicity of the setup. Any ideas or checks I might have missed would be greatly appreciated!&lt;br&gt;&lt;br&gt;Thanks in advance.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/09\/17-09-2025-1758108442-Screenshot 2025-09-17 081229.png\" alt=\"\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-441611","topic","type-topic","status-publish","hentry","topic-tag-meshingerror-1","topic-tag-3d-wing-1","topic-tag-aerofoil","topic-tag-fluent-mesh","topic-tag-surface-meshing"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi all,UPDATE: Why does meshing work when the geometry is saved as .stp and not when in native .dsco\/.pmdb\/.scdoc\/.agdb ??---I\u2019m struggling to create even a coarse surface mesh in Fluent Meshing for what should be a straightforward case: half a wing in axial flow inside a symmetric cuboidal (wide) domain. 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