{"id":392264,"date":"2024-10-31T14:49:17","date_gmt":"2024-10-31T14:49:17","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/correct-cfx-pre-setup-to-avoid-isolated-fluid-regions\/"},"modified":"2024-10-31T14:49:17","modified_gmt":"2024-10-31T14:49:17","slug":"correct-cfx-pre-setup-to-avoid-isolated-fluid-regions","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/correct-cfx-pre-setup-to-avoid-isolated-fluid-regions\/","title":{"rendered":"Correct CFX Pre Setup to avoid isolated fluid regions"},"content":{"rendered":"<p>&lt;p&gt;I am trying to simulate external and internal flow however whenever I try to setup my simulation (including setting a wall on all of the other interior volume&#8217;s faces besides the inlet\/outlet) I always get an error saying there are two isolated fluid regions and the solver cannot compute. In my initial CFX-Pre window, it says my domain has two fluid-fluid interfaces. I go to those and under non-overlap conditions I set these interfaces to a no-slip wall. I then set the rest of my boundary conditions as normal (velocity inlet and 0Pa opening for the bounding box and the internal volume and no-slip walls for all other surfaces). What am I missing in my setup that causes this error?<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/31-10-2024-1730386129-Screenshot 2024-10-31 104511.png\" alt=\"\" \/>&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-392264","topic","type-topic","status-publish","hentry","topic-tag-ansys-cfx","topic-tag-interface"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["260782","62368"],"_bbp_author_ip":["128.143.0.10"],"_btv_view_count":["458"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["392264"],"_bbp_forum_id":["27792"],"_bbp_engagement":["62368","260782"],"_bbp_voice_count":["2"],"_bbp_reply_count":["23"],"_bbp_last_reply_id":["392744"],"_bbp_last_active_id":["392744"],"_bbp_last_active_time":["2024-11-05 09:27:15"]},"test":"qnp5rgvirginia-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392264","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\/392264\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=392264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}