{"id":403171,"date":"2025-01-01T23:03:17","date_gmt":"2025-01-01T23:03:17","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/two-way-fsi-excessive-thickness-change\/"},"modified":"2025-01-01T23:03:17","modified_gmt":"2025-01-01T23:03:17","slug":"two-way-fsi-excessive-thickness-change","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/two-way-fsi-excessive-thickness-change\/","title":{"rendered":"Two-way FSI: excessive thickness change"},"content":{"rendered":"<p>&lt;p&gt;I&#8217;m setting up a two-way FSI simulation, but it keeps crashing due to excessive thickness change errors in ANSYS. The CFD part (Fluent) works perfectly, but the issue arises when coupling it for FSI.&lt;\/p&gt;&lt;p&gt;I&rsquo;ve used wall properties with a density of 1000, a Young&rsquo;s modulus of 2 MPa, and a Poisson&rsquo;s ratio of 0.49 (these are rough estimates). Despite this, my model keeps crashing. The only time I managed to get the two-way FSI to run was &lt;span style=&#8221;color: #ba372a;&#8221;&gt;<strong>when I used wall properties resembling structural steel,<\/strong>&lt;\/span&gt; which isn&rsquo;t physiologically appropriate for this scenario. (fluid is Blood)&lt;\/p&gt;&lt;p&gt;Do you have any insights or suggestions?&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-403171","topic","type-topic","status-publish","hentry","topic-tag-excessive-distortion-1","topic-tag-fsi-2-way-1","topic-tag-two-way-fsi-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["403171"],"_bbp_subscription":["431728","805","581625"],"_bbp_author_ip":["130.215.190.183"],"_bbp_last_reply_id":["438595"],"_bbp_last_active_id":["438595"],"_bbp_last_active_time":["2025-08-05 07:58:20"],"_bbp_reply_count":["10"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["3"],"_bbp_engagement":["431728","805","581625"],"_btv_view_count":["255"],"_bbp_topic_status":["unanswered"]},"test":"751ef47ef94a7db2035eda1dd10abecb4b252174"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/403171","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\/403171\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=403171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}