{"id":341553,"date":"2023-12-21T13:21:56","date_gmt":"2023-12-21T13:21:56","guid":{"rendered":"\/forum\/forums\/topic\/modeling-of-phase-change-materials\/"},"modified":"2023-12-21T13:21:56","modified_gmt":"2023-12-21T13:21:56","slug":"modeling-of-phase-change-materials","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/modeling-of-phase-change-materials\/","title":{"rendered":"Modeling of phase change materials"},"content":{"rendered":"<p>Hello,<\/p>\n<p>I am trying to model a phase change material (RT21). I am doing it in Ansys Workbench as a thermal- transient analysis (not in Fluent!).&nbsp;<\/p>\n<p>In order to do this I had to define the materials properties in engineering data and the enthalpy as a APDL- command. I did it and calculated the enthalpy of the material first (1.Photo). now when I define the enthalpy through mpdata like I caculated: 3.4e7, 1.82e8, 1.94e8 (J\/m&sup3;) I get wrong tempratures for the material as a result (I have experimental Data to compare with).&nbsp;<\/p>\n<p>When I put the enthalpy like this: 3.4e6, 1.82e7, 1.94e7 (J\/m&sup3;) (division on 10), I get correct results as the labor- data.&nbsp;<\/p>\n<p>The calculation of the enthalpy is correct. In which units do I have to put the enthalpy when I use the mpdata- command?&nbsp;<\/p>\n<p>Can anyone please tell me if I am doing something wrong.&nbsp;<\/p>\n<p>Thanks in advanced&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/12\/21-12-2023-1703164911-mceclip0.png\"><\/p>\n","protected":false},"template":"","class_list":["post-341553","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["303572","23687","20905","342892"],"_bbp_author_ip":["23.206.193.59"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["3047"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["341553"],"_bbp_forum_id":["27815"],"_bbp_engagement":["20905","23687","303572","342892"],"_bbp_voice_count":["4"],"_bbp_reply_count":["13"],"_bbp_last_reply_id":["360482"],"_bbp_last_active_id":["360482"],"_bbp_last_active_time":["2024-04-04 12:52:14"]},"test":"a-sabrastud-uni-hannover-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/341553","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\/341553\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=341553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}