{"id":398649,"date":"2024-12-28T00:07:00","date_gmt":"2024-12-28T00:07:00","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-issue-for-transonic-flow\/"},"modified":"2024-12-28T00:11:55","modified_gmt":"2024-12-28T00:11:55","slug":"convergence-issue-for-transonic-flow","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-issue-for-transonic-flow\/","title":{"rendered":"convergence issue for transonic flow"},"content":{"rendered":"<p>&lt;p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;hi,&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;i am simulating a transonic flow with pressure ratio 0.58 which is the ratio of static pressure at exit to stagnation pressure at inlet.&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;At inlet the pressure is 1 atm and outlet it is 0.58 atm.&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;it is a 2D simuation internal flow with density based solver as it is a compressible flow. I am using k-epsilon and K-Omega models but both them are not converging.can anyone please check my mesh and boundry conditions i have doubts with pressure inlet and pressure outlet conditons.i am attaching my screenshots of&lt;span style=&#8221;font-size: 14pt;&#8221;&gt; simulation&lt;\/span&gt;&lt;\/p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/28-12-2024-1735344630-INLET BOUNDRY CONDITIONS.PNG\" alt=\"\" width=\"166\" height=\"112\" \/>ideal gas density and pressure at outlet is 0.58.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-398649","topic","type-topic","status-publish","hentry","topic-tag-cfd-convergence","topic-tag-initial-pressure-2","topic-tag-supersonic-initial-gauge-pressure-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["398649"],"_bbp_author_ip":["52.151.106.135"],"_bbp_last_reply_id":["404007"],"_bbp_last_active_id":["404007"],"_bbp_last_active_time":["2025-01-07 21:01:24"],"_bbp_reply_count":["11"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["455841","13659"],"_btv_view_count":["871"],"_bbp_topic_status":["unanswered"],"_edit_last":["455841"],"_bbp_revision_log":["a:1:{i:398650;a:2:{s:6:\"author\";i:455841;s:6:\"reason\";s:0:\"\";}}"],"_bbp_subscription":["13659","455841"]},"test":"vamshigundla003gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/398649","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/398649\/revisions"}],"predecessor-version":[{"id":398650,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/398649\/revisions\/398650"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=398649"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}