{"id":281438,"date":"2023-04-27T12:52:59","date_gmt":"2023-04-27T12:52:59","guid":{"rendered":"\/forum\/forums\/topic\/non-reflecting-outlet-can-not-keep-desired-pressure\/"},"modified":"2023-04-27T12:52:59","modified_gmt":"2023-04-27T12:52:59","slug":"non-reflecting-outlet-can-not-keep-desired-pressure","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/non-reflecting-outlet-can-not-keep-desired-pressure\/","title":{"rendered":"Non-reflecting outlet can not keep desired pressure"},"content":{"rendered":"<p>Hello, I am having an issue with simulating the 2D turbine linear blade cascade using FLUENT 2023R1. As there is a supersonic exit velocity with shock-waves, I require a non-reflecting boundary condition. Currently, I am using a steady state implicit density-based solver and compressible ideal gas model with a general NRBC. However, the static pressure at the pressure-outlet boundary condition is deviating considerably from the desired value and is not remaining constant. I have tried using both pressure at infinity and average pressure boundary specifications, as well as adjusting the sigma1 and sigma2 constants, but have not found a solution.<\/p>\n<p>Is there any trick to make the NRBC keep the constant outlet pressure?<\/p>\n","protected":false},"template":"","class_list":["post-281438","topic","type-topic","status-closed","hentry","topic-tag-fluent-cfd-ansys-1","topic-tag-2d-cfd-1","topic-tag-boundary-condition","topic-tag-non-reflection-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["242542","8124"],"_bbp_author_ip":["23.192.164.21"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["607"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["281438"],"_bbp_forum_id":["27792"],"_bbp_engagement":["8124","242542"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["281928"],"_bbp_last_active_id":["281928"],"_bbp_last_active_time":["2023-05-02 10:11:28"]},"test":"halait-cas-cz"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/281438","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\/281438\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=281438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}