{"id":398703,"date":"2024-12-29T13:44:48","date_gmt":"2024-12-29T13:44:48","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/reference-enthalpy-values-in-material-properties-database-ansys-fluent\/"},"modified":"2024-12-29T13:44:48","modified_gmt":"2024-12-29T13:44:48","slug":"reference-enthalpy-values-in-material-properties-database-ansys-fluent","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/reference-enthalpy-values-in-material-properties-database-ansys-fluent\/","title":{"rendered":"Reference Enthalpy Values in Material Properties database Ansys Fluent"},"content":{"rendered":"<p>&lt;p class=&#8221;MsoNormal&#8221;&gt;Hi Fluent Experts.&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;I am simulating water flow boiling through microchannel using Multiphase VOF model on Ansys Fluent&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;I have a question&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;Why Ansys Fluent in Material properties takes reference Enthalpy of liquid- water is -2.858e+08 J\/kgmol with molecular weight of 18.0152 kg\/kmol at reference temperature of 298 K&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;Similarly Ansys takes enthalpy of vapor-water -2.418e+08 J\/kgmol with molecular weight of 18.01534 kg\/kmol as at reference temperature of 298.15 K&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;I have calculated and understand the latent heat of vaporization i.e. the difference of both enthalpies (h<em>&lt;sub&gt;fg&lt;\/sub&gt;<\/em>) is same as that the difference in enthalpies values for liquid-water and vapor taken from steam table at 298.15 K&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;But still why fluent is using these huge reference values with -ve signs.&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;Thanks&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-398703","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["398703"],"_bbp_author_ip":["178.250.251.13"],"_bbp_last_reply_id":["403985"],"_bbp_last_active_id":["403985"],"_bbp_last_active_time":["2025-01-07 18:53:57"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["338228","23673"],"_btv_view_count":["966"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["23673","338228"]},"test":"samiasadaf_uetianyahoo-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/398703","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\/398703\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=398703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}