{"id":292941,"date":"2023-07-13T13:24:10","date_gmt":"2023-07-13T13:24:10","guid":{"rendered":"\/forum\/forums\/topic\/modeling-internal-using-porous-media-model-fluid-get-stuck-under-the-internal\/"},"modified":"2023-07-13T13:24:10","modified_gmt":"2023-07-13T13:24:10","slug":"modeling-internal-using-porous-media-model-fluid-get-stuck-under-the-internal","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/modeling-internal-using-porous-media-model-fluid-get-stuck-under-the-internal\/","title":{"rendered":"Modeling internal using porous media model &#8211; fluid get stuck under the internal"},"content":{"rendered":"<p>Hi!<\/p>\n<p>I&#8217;m relatively new in CFD. I&#8217;m trying to model the multiphase flow through a thin (5mm) porous internal using a porous media model. The simulation converges nicely, but then suddenly crashes. Looking at the gas volume fraction contour I can see that in some regions the fluid flows freely (the porous media model does not create any resistance), but in another, gas gets stuck under the object and there is no flow through it. This creates a kind of &#8220;dead zone&#8221; after the object. I think that causes deconvergence, but I don&#8217;t know how to solve this problem. I couldn&#8217;t find any similar problems anywhere. I tried different meshing strategies including local sizing in porous zone regions. The time step is small (0.001). The mesh there is very fine (max.1 mm cells) The quality of mesh is good. The model is as simple as possible.<\/p>\n<p>Does anyone has an idea what can cause such issue? I truly appreciate any ideas.<\/p>\n","protected":false},"template":"","class_list":["post-292941","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["288798","199"],"_bbp_author_ip":["96.7.218.223"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["422"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["292941"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","288798"],"_bbp_voice_count":["2"],"_bbp_reply_count":["14"],"_bbp_last_reply_id":["301491"],"_bbp_last_active_id":["301491"],"_bbp_last_active_time":["2023-08-15 10:08:03"]},"test":"l-olczewskagmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/292941","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\/292941\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=292941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}