{"id":163148,"date":"2021-10-18T00:22:56","date_gmt":"2021-10-18T00:22:56","guid":{"rendered":"\/forum\/forums\/topic\/source-term-in-energy-equation\/"},"modified":"2021-10-20T11:42:02","modified_gmt":"2021-10-20T11:42:02","slug":"source-term-in-energy-equation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/source-term-in-energy-equation\/","title":{"rendered":"Source Term in Energy Equation"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello there.<\/p>\n<p>I&#039;m running a phase change simulation in fluent using the LEE model, it&#039;s a condensation case. For that, I need to add the source term in the energy equation. I know that I can do this with the DEFINE_SOURCE macro. But, I&#039;m not good with the UDF&#039;s right now. I made one but it&#039;s not working. I went through the Fluent User Manual and came to know that I can add the source term using the following command:<\/p>\n<p><em>solve\/set\/multiphase-numerics\/heat-mass-transfer\/alternative-energytreatment <\/em><\/p>\n<p>I tried and it&#039;s working. I can tell from the results that the source term is being added. But, I don&#039;t know where to put the latent heat for that energy source. So far I know that the difference between the SSE is taken as the latent heat.<strong> First,<\/strong> I&#039;m a bit confused about the units. The unit for SSE (standard state enthalpy) is J\/kgmol and for latent heat is J\/kg. <strong>Secondly,<\/strong> I want to add the latent heat as 329,400 J\/kg, in order to add this value as a difference between SSE. Should I subtract the SSE of liquid from vapors or it&#039;s the other way around. I went through the user manual again but couldn&#039;t understand much about how fluent takes the latent heat.<\/p>\n<p>Please let me know if anyone have an idea about this.<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/318\/ROW4MMOGPYIJ.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/318\/ROW4MMOGPYIJ.png\" alt=\"image.png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-163148","topic","type-topic","status-closed","hentry","topic-tag-energy-source-term-2","topic-tag-latent-heat"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_old_reply_author_name_id":["Anonymous"],"_bbp_old_is_reply_anonymous_id":["false"],"_btv_view_count":["2222"],"_bbp_likes_count":["0"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["163148"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","220345"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["194998"],"_bbp_last_active_id":["194998"],"_bbp_last_active_time":["2021-10-20 11:42:02"]},"test":"faizanyounas356outlook-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/163148","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\/163148\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=163148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}