{"id":40096,"date":"2020-01-12T19:57:59","date_gmt":"2020-01-12T19:57:59","guid":{"rendered":"\/forum\/forums\/topic\/confused-about-surface-nusselt-number-evaluation-in-fluent\/"},"modified":"2020-01-12T19:57:59","modified_gmt":"2020-01-12T19:57:59","slug":"confused-about-surface-nusselt-number-evaluation-in-fluent","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/confused-about-surface-nusselt-number-evaluation-in-fluent\/","title":{"rendered":"Confused about Surface Nusselt number evaluation in Fluent"},"content":{"rendered":"<p>Hello&nbsp;<\/p>\n<p><\/p>\n<p>I am really confused about Nusselt prediction in Fluent. I aware that there is a method to predict it from the surface integral&gt;wall fluxes&gt;surface Nusselt number. I tried to evaluate Nusselt on another method based on the temperature gradient in which :<\/p>\n<p><\/p>\n<p>q&#8221; = -k (dT\/dx)&nbsp;<\/p>\n<p><\/p>\n<p>then h= q&#8221;\/(T-Tref) = -k(dT\/dx)\/(T-Tref)<\/p>\n<p><\/p>\n<p>finally Nu=hL\/k = -(dT\/dx) * L\/(T-Tref)<\/p>\n<p><\/p>\n<p>I found the Nusselt predicted from the two methods is not the same why? knowing that I set Tref at the reference values<\/p>\n<p><\/p>\n<p>Thanks<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>Khalid<\/p>\n","protected":false},"template":"","class_list":["post-40096","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["12275"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["3808"],"_bbp_subscription":["242267"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["40096"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","22555","167804"],"_bbp_voice_count":["3"],"_bbp_reply_count":["16"],"_bbp_last_reply_id":["102810"],"_bbp_last_active_id":["102810"],"_bbp_last_active_time":["2020-01-17 17:44:18"]},"test":"khalidb77"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/40096","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\/40096\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=40096"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}