{"id":163528,"date":"2021-10-29T08:54:37","date_gmt":"2021-10-29T08:54:37","guid":{"rendered":"\/forum\/forums\/topic\/different-residuals-by-changing-boundary-conditions\/"},"modified":"2021-11-01T11:50:50","modified_gmt":"2021-11-01T11:50:50","slug":"different-residuals-by-changing-boundary-conditions","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/different-residuals-by-changing-boundary-conditions\/","title":{"rendered":"Different residuals by changing boundary conditions"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello everyone<\/p>\n<p>I modeled one vertical suction pipe with a 10 cm diameter inside the bigger pipe in 3D format. The suction pump did not model. I got the properties of flow practically and water velocity at the end of the suction pipe stand 0.5 to 1.8 m\/s. Therefore, the flow has turbulence conditions. Maximum Aspect Ratio = 8.3. The solver SST K-omega.<\/p>\n<p>The important things are water velocity in the area from end of the bigger pipe to entrance suction pipe.<\/p>\n<p>First boundaries condition &quot; Inlet = velocity inlet, Outlet = Outflow&quot; . Then I change them to &quot;Inlet = Pressure inlet, Outlet = Velocity inlet with minus velocity magnitude. In both cases, the residuals did not convergences. I run it also with decreased under-relaxation factors but no success. <\/p>\n<div data-embedjson=\"{&quot;url&quot;:&quot;\/forum\/wp-content\/uploads\/forum-uploads\/868\/HMJXE3S23H4B.png&quot;,&quot;name&quot;:&quot;0.31- 3.png&quot;,&quot;type&quot;:&quot;image\/png&quot;,&quot;size&quot;:400912,&quot;width&quot;:1220,&quot;height&quot;:857,&quot;embedType&quot;:&quot;file&quot;}\">\n<a href=\"\/forum\/wp-content\/uploads\/forum-uploads\/868\/HMJXE3S23H4B.png\" download aria-label=\"0.31- 3.png\"><br \/>\n0.31- 3.png<br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-163528","topic","type-topic","status-closed","hentry","topic-tag-ansys-fluent","topic-tag-boundary-conditions","topic-tag-convergence","topic-tag-meshing"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_old_reply_author_name_id":["Anonymous"],"_bbp_old_is_reply_anonymous_id":["false"],"_btv_view_count":["301"],"_bbp_likes_count":["0"],"_bbp_subscription":["237651"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["163528"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","237651"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["196235"],"_bbp_last_active_id":["196235"],"_bbp_last_active_time":["2021-11-01 11:50:50"]},"test":"paanirgmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/163528","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\/163528\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=163528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}