{"id":363162,"date":"2024-04-19T10:30:22","date_gmt":"2024-04-19T10:30:22","guid":{"rendered":"\/forum\/forums\/topic\/heat-flux-boundary-conditions\/"},"modified":"2024-04-19T10:30:22","modified_gmt":"2024-04-19T10:30:22","slug":"heat-flux-boundary-conditions","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/heat-flux-boundary-conditions\/","title":{"rendered":"Heat Flux &#8211; Boundary conditions"},"content":{"rendered":"<p>Hi,&nbsp;<\/p>\n<div>I&#8217;m having a problem simulating a water heating element. In this case, I have a flow-through water pipe, where a heat flux of 35 W\/cm2 is applied to the outer surface, but when I enter this value and run the simulation, the heat flux is not constant, as you can see in the image. But if I apply a temperature, e.g. 250&ordm;C, the problem is solved and the entire surface stays at that temperature.&nbsp;Since I&#8217;m simulating in a steady regime, shouldn&#8217;t I have a constant heat flux along the tube?&nbsp;<\/div>\n<div>&nbsp;<\/div>\n<div>Also, can anyone explain how shell conduction works and whether it&#8217;s necessary or advisable to apply it in this case?&nbsp;<\/div>\n<div>&nbsp;<\/div>\n<div>Thank you.<\/div>\n<div><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/19-04-2024-1713522030-mceclip0.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/19-04-2024-1713522603-mceclip1.png\"><\/div>\n","protected":false},"template":"","class_list":["post-363162","topic","type-topic","status-closed","hentry","topic-tag-heat-flux","topic-tag-heat-transfer"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["344061","199"],"_bbp_author_ip":["96.7.218.215"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["330"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["363162"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","344061"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["363238"],"_bbp_last_active_id":["363238"],"_bbp_last_active_time":["2024-04-19 15:50:07"]},"test":"raf-oliveiraua-pt"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/363162","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\/363162\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=363162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}