{"id":341733,"date":"2023-12-22T11:39:34","date_gmt":"2023-12-22T11:39:34","guid":{"rendered":"\/forum\/forums\/topic\/high-resolution-meshing-of-centrifugal-compressor-stage\/"},"modified":"2023-12-22T11:39:34","modified_gmt":"2023-12-22T11:39:34","slug":"high-resolution-meshing-of-centrifugal-compressor-stage","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/high-resolution-meshing-of-centrifugal-compressor-stage\/","title":{"rendered":"High resolution meshing of centrifugal compressor stage"},"content":{"rendered":"<p>Hello,<\/p>\n<p>I&#8217;m curently working on evaluating the availible turbulence models for the steady state simulation of a centrifugal compressor stage (NASA HECC). For most of the models, a y+&lt;1 is recommended for the entire domain to accurately capture the boundary layer. Naturally, this results in a relatively small first element offset.&nbsp;<\/p>\n<p>Using Turbogrid I am able to produce a viable mesh which satisfies the y+ target, however, the Maximum Edge Length Ratio of elements close to walls remains above the limit (1000) regardless of which mesh settings I change. Even with a mesh size of 17 million elements for the impeller alone, the Maximum Edge length Ratio is around 33000 with 15% of the cells being above 1000.&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/12\/22-12-2023-1703245005-mceclip0.png\" width=\"1010\" height=\"734\"><\/p>\n<p>Am I missing something? In this instance would the Maximum Edge Length Error not impact the quality of my simulation?<\/p>\n","protected":false},"template":"","class_list":["post-341733","topic","type-topic","status-closed","hentry","topic-tag-ansys-cfx","topic-tag-compressor","topic-tag-turbogrid","topic-tag-turbomachinery"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["68996","18096"],"_bbp_author_ip":["96.7.218.223"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1599"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["341733"],"_bbp_forum_id":["27790"],"_bbp_engagement":["18096","68996"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["342865"],"_bbp_last_active_id":["342865"],"_bbp_last_active_time":["2024-01-03 08:23:58"]},"test":"bsakmiconsult-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/341733","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\/341733\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=341733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}