{"id":320726,"date":"2023-12-04T12:00:15","date_gmt":"2023-12-04T12:00:15","guid":{"rendered":"\/forum\/forums\/topic\/how-to-model-outlet-heat-reduction-using-udf\/"},"modified":"2023-12-04T12:00:15","modified_gmt":"2023-12-04T12:00:15","slug":"how-to-model-outlet-heat-reduction-using-udf","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-model-outlet-heat-reduction-using-udf\/","title":{"rendered":"How to Model Outlet Heat Reduction using UDF"},"content":{"rendered":"<p>Hi,<\/p>\n<p>I am interested to reduce the outlet temperature at the outlet of a domain (say a straight pipe) assuming that there is an heat exchanging effect occuring near the outlet (despite I am not modelling the sub-system). In other words, if I put in 1000C, I ought to get 800C if there is a 200C heat exchanging occuring.&nbsp;<\/p>\n<p>Could you tell me where can I start to learn the UDF (syntax and commands?) I was able to perform the simple transient UDF BC&nbsp; Inlet using interpret function and resources found online.<\/p>\n<p>Secondly, will this operation also enable me to get a &#8216;revised\/tuned&#8217; NOx formation value at the outlet because of the reduced 200C temperature at the outlet? Or to get the effect, I should set a new plane somewhere upstream before the outlet and implement the UDF + run the NOx formation model? So by the time the fluid reaches the outlet, the NOx will be representative of the final outlet value?<\/p>\n<p>Could you advise?&nbsp;<\/p>\n<p>Thanks!<br \/>Jee&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-320726","topic","type-topic","status-closed","hentry","topic-tag-combustion","topic-tag-fluent","topic-tag-nox-emissions","topic-tag-udf"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["252005","15180"],"_bbp_author_ip":["96.7.218.215"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["196"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["320726"],"_bbp_forum_id":["27792"],"_bbp_engagement":["15180","252005"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["326412"],"_bbp_last_active_id":["326412"],"_bbp_last_active_time":["2023-12-05 11:11:08"]},"test":"j-loongheesheffield-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/320726","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\/320726\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=320726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}