{"id":317992,"date":"2023-11-16T13:24:53","date_gmt":"2023-11-16T13:24:53","guid":{"rendered":"\/forum\/forums\/topic\/surface-roughness-and-y\/"},"modified":"2023-11-16T13:24:53","modified_gmt":"2023-11-16T13:24:53","slug":"surface-roughness-and-y","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/surface-roughness-and-y\/","title":{"rendered":"Surface roughness and y+"},"content":{"rendered":"<p>Hi!<\/p>\n<p>I have added surface roughness into my k-omega SST model, and I&#8217;m unsure about how to interpret the y+ value. For a smooth pipe, it should be around 1, and with the added roughness I can&#8217;t get it below 20. I&#8217;ve tried searching online, but I can only find information about wall functions, not specifically for being in the viscous layer.<\/p>\n<p>I would greatly appreciate some insight into this or if anyone knows where I can find information about this!&nbsp;<\/p>\n<p>Thanks!<\/p>\n","protected":false},"template":"","class_list":["post-317992","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["295431","13659"],"_bbp_author_ip":["23.206.193.146"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["399"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["317992"],"_bbp_forum_id":["27792"],"_bbp_engagement":["13659","295431"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["318202"],"_bbp_last_active_id":["318202"],"_bbp_last_active_time":["2023-11-17 14:29:05"]},"test":"lissev-9student-ltu-se"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/317992","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\/317992\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=317992"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}