{"id":362033,"date":"2024-04-12T20:29:29","date_gmt":"2024-04-12T20:29:29","guid":{"rendered":"\/forum\/forums\/topic\/mixing-planes-stage-vs-frozen-rotor-in-cfx-floating-point-errors\/"},"modified":"2024-04-12T20:29:29","modified_gmt":"2024-04-12T20:29:29","slug":"mixing-planes-stage-vs-frozen-rotor-in-cfx-floating-point-errors","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mixing-planes-stage-vs-frozen-rotor-in-cfx-floating-point-errors\/","title":{"rendered":"Mixing planes (stage) vs Frozen Rotor in CFX floating point errors"},"content":{"rendered":"<p>Hi all,<\/p>\n<p>I am trying to run a simulation in CFX to determine the static thrust of a propeller. I have not been getting results that match experimental data, so I tried to compare FR to stage. However, with the exact same settings on both, I keep getting floating point overflow errors when using the stage interface when compared to FR. What would I need to change to make it work? I want to make this comparison because I will be using valid results to run a coaxial contra-rotating configuration, and frozen rotor will not be ideal for that simulation.<\/p>\n<p>What boundary conditions do I need to add to have a good simulation to get good results? I have tried total pressure, static pressure, velocity for the inlet, and pressure and opening outlets that haven&#8217;t provided good results. You can see the images here:<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/12-04-2024-1712953694-mceclip0.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/12-04-2024-1712953694-mceclip1.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/12-04-2024-1712953693-mceclip2.png\"><\/p>\n","protected":false},"template":"","class_list":["post-362033","topic","type-topic","status-closed","hentry","topic-tag-ansys-cfx","topic-tag-boundary-conditions","topic-tag-floating-point-error","topic-tag-frozenrotor-1","topic-tag-mixing-plane-1","topic-tag-propeller-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["288408","39507"],"_bbp_author_ip":["23.206.193.146"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1362"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["362033"],"_bbp_forum_id":["27792"],"_bbp_engagement":["39507","288408"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["362571"],"_bbp_last_active_id":["362571"],"_bbp_last_active_time":["2024-04-16 20:52:21"]},"test":"gnanarajstudent-chalmers-se"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/362033","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\/362033\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=362033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}