{"id":310524,"date":"2023-10-08T07:52:17","date_gmt":"2023-10-08T07:52:17","guid":{"rendered":"\/forum\/forums\/topic\/error-latent-heat-cannot-be-less-than-zero\/"},"modified":"2023-10-08T07:52:17","modified_gmt":"2023-10-08T07:52:17","slug":"error-latent-heat-cannot-be-less-than-zero","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/error-latent-heat-cannot-be-less-than-zero\/","title":{"rendered":"ERROR: Latent heat cannot be less than zero!"},"content":{"rendered":"<p>Hi,<\/p>\n<p>I am having an issue in ANSYS simulation. I am trying to do condensation of water vapor to water liquid but when I initialize the solution, it says latent heat cannot be less than zero.&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/10\/08-10-2023-1696751307-Latent Heat can not be zero.png\" alt=\"\"><\/p>\n<p>I tried to search online &amp; it comes to my knowledge that it is related to enthalpy.&nbsp;<\/p>\n<p>as enthalpy of liquid is -2.858e+08 and&nbsp;<\/p>\n<p>enthalpy for vapor is -2.418e+08 at standard temperature. so change in enthalpy is coming negative which means the latent heat is less than zero.&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/10\/08-10-2023-1696751428-Water Liquid Enthalpy.png\" alt=\"\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/10\/08-10-2023-1696751438-Water Vapor Enthalpy.png\" alt=\"\"><\/p>\n<p>Can anyone help me, how to resolve this issue or what values I need to choose for enthalpies in this case.<\/p>\n<p>&nbsp;<\/p>\n<p>NOTE: I already did the simulation for water boiling\/evaporation and I didn&#8217;t face such issue in that particular case.&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-310524","topic","type-topic","status-closed","hentry","topic-tag-multiphase_models-1","topic-tag-multiphaseudfevaporationdpmspeciestransportdefinesourcesourcetermeulerianlagrangian-1","topic-tag-latent-heat","topic-tag-vof"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["294380","199"],"_bbp_author_ip":["96.7.218.215"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["5403"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["310524"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","294380"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["312048"],"_bbp_last_active_id":["312048"],"_bbp_last_active_time":["2023-10-18 11:52:23"]},"test":"abdullahhassanmail-ustc-edu-cn"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/310524","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\/310524\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=310524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}