{"id":460335,"date":"2026-06-25T19:07:42","date_gmt":"2026-06-25T19:07:42","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/defining-an-inlet-from-an-opening-fluent\/"},"modified":"2026-06-25T19:07:42","modified_gmt":"2026-06-25T19:07:42","slug":"defining-an-inlet-from-an-opening-fluent","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/defining-an-inlet-from-an-opening-fluent\/","title":{"rendered":"Defining an inlet from an opening &#8211; Fluent"},"content":{"rendered":"<p>&lt;p&gt;Hello! I&#8217;m looking to set up a particle deposition simulation in Fluent. The CAD (image below) has an opening at the top and bottom where the inlet and outlet are supposed to be, but I&#8217;m having trouble moving past the meshing step because it won&#8217;t recognize the top opening as an inlet. Both openings are made of two edges. When I use the two edges to make named selections of &#8220;inlet&#8221; and &#8220;outlet&#8221;, meshing doesn&#8217;t recognize them as inlet &amp; outlet to then set up the fluid zone (which would be the empty space in the middle). When I created a surface using the edges and then defined the faces as inlet and outlet, Fluent meshing ran into an error when capping the enclosed fluid region saying&nbsp;&lt;\/p&gt;&lt;p data-pm-slice=&#8221;1 1 []&#8221;&gt;&#8221;A cap could not be created using the specified zone\/label. Ensure your zone\/label encloses the whole opening.&lt;\/p&gt;&lt;p&gt;Error Object: #f&#8221;&lt;\/p&gt;&lt;p&gt;Any help would be much appreciated! I can also provide more info about the system as necessary.&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2026\/06\/25-06-2026-1782414194-mceclip0.png\" width=\"266\" height=\"143\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-460335","topic","type-topic","status-publish","hentry","topic-tag-ansys-fluent-meshing-1","topic-tag-boundary-conditions","topic-tag-meshing"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["460335"],"_bbp_subscription":["287289","199842"],"_bbp_author_ip":["132.216.240.22"],"_bbp_last_reply_id":["460422"],"_bbp_last_active_id":["460422"],"_bbp_last_active_time":["2026-06-26 20:11:54"],"_bbp_reply_count":["2"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["287289","199842"],"_btv_view_count":["39"],"_bbp_topic_status":["unanswered"]},"test":"meghana-munipallemail-mcgill-ca"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/460335","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/460335\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=460335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}