{"id":361585,"date":"2024-04-10T16:51:49","date_gmt":"2024-04-10T16:51:49","guid":{"rendered":"\/forum\/forums\/topic\/doubt-about-y-plus-value-for-simulations\/"},"modified":"2024-04-10T16:56:01","modified_gmt":"2024-04-10T16:56:01","slug":"doubt-about-y-plus-value-for-simulations","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/doubt-about-y-plus-value-for-simulations\/","title":{"rendered":"Doubt About Y Plus Value for Simulations"},"content":{"rendered":"<p>Hi,&nbsp;<\/p>\n<p>I am doing a CFD of a shell and tube heat exchnager ( simple model with 7 tubes(. I am using a <span style=\"text-decoration: underline\"><strong>standard wall function with a K Epsilon standard turbulence model<\/strong><\/span>. The target y plus is 30 so I use a Yh of 2.2 mm with 2 layers.&nbsp;<\/p>\n<ol>\n<li style=\"text-align: justify\">The average y plus is around 14 at the tube surface after CFD post, I can increase it but the inflation mesh coarsens. I did increase but there isnt a signifcant increase ( increases to 19 around). Solutions are converging to reasonable results ( plot is shown below).&nbsp;<\/li>\n<li style=\"text-align: justify\">I am able to easily refine the wall mesh to get Y plus values around 5 , then is it reasonable to use the standard wall function in this case. As in literature i see such cases. Or should I opt for a enhanced wall treatment or scalable.<\/li>\n<\/ol>\n<p>TIA,&nbsp;<\/p>\n<p>Ashen&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/10-04-2024-1712768013-Picture1.png\" alt=\"\" width=\"471\" height=\"390\"><\/p>\n","protected":false},"template":"","class_list":["post-361585","topic","type-topic","status-closed","hentry","topic-tag-fluent-cfd-ansys-1","topic-tag-heat_exchanger-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["281119","199"],"_bbp_author_ip":["23.206.193.146"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["294"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1712767969:213352"],"_bbp_topic_id":["361585"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","281119"],"_bbp_voice_count":["2"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["361753"],"_bbp_last_active_id":["361753"],"_bbp_last_active_time":["2024-04-11 14:46:21"]},"test":"20625409student-curtin-edu-au"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/361585","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\/361585\/revisions"}],"predecessor-version":[{"id":361586,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/361585\/revisions\/361586"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=361585"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}