{"id":284806,"date":"2023-05-19T01:26:08","date_gmt":"2023-05-19T01:26:08","guid":{"rendered":"\/forum\/forums\/topic\/simulation-of-water-as-it-freezes\/"},"modified":"2023-05-19T01:26:08","modified_gmt":"2023-05-19T01:26:08","slug":"simulation-of-water-as-it-freezes","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulation-of-water-as-it-freezes\/","title":{"rendered":"Simulation of water as it freezes"},"content":{"rendered":"<div>Good day Ansys team<\/div>\n<div>&nbsp;<\/div>\n<div>I have a problem with my model. I am simulating Water inside an annulus. I was able to reduce my model to a 2D figure as seen in the picture.&nbsp;<\/div>\n<div>&nbsp;<\/div>\n<div><img loading=\"lazy\" decoding=\"async\" title=\"2d model\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/05\/19-05-2023-1684459340-Screenshot 2023-05-16 203507.png\" alt=\"\" width=\"734\" height=\"470\"><\/div>\n<div>&nbsp;<\/div>\n<div>I need to monitor the behaviour of water as its freezes from 288K to 259K. The model consists of an outer casing which is Steel, Two temperature boundaries that are set at a temperature of 259K and a PCM which is Water\/liquid.<\/div>\n<div>&nbsp;<\/div>\n<div>&nbsp;<\/div>\n<div>I am using a transient state, with a Laminar turbulence model, energy equation and solidification and melting feature. I have 30941 Number of time steps with a time step size of 1.<\/div>\n<div>&nbsp;<\/div>\n<div>&nbsp;The problem arises when I insert the Pure Solvent Melting Heat&nbsp;as 330 000. The model becomes unstable and I get ridiculous temperatures when I monitor the temperature through the animation. this is seen on the attached picture<\/div>\n<div>&nbsp;<\/div>\n<div><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/05\/19-05-2023-1684459410-Screenshot 2023-05-16 202710.png\" alt=\"\" width=\"637\" height=\"541\"><\/div>\n<div>&nbsp;<\/div>\n<div><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/05\/19-05-2023-1684459472-Screenshot 2023-05-16 202422.png\" alt=\"\" width=\"564\" height=\"447\"><\/div>\n<div>&nbsp;<\/div>\n<div>When I set the Pure Solvent Melting Heat to zero, the model runs well within the specified range, but the liquid fraction remains as 1.&nbsp;&nbsp;<\/div>\n<div>&nbsp;<\/div>\n<div>Please correct me.<\/div>\n","protected":false},"template":"","class_list":["post-284806","topic","type-topic","status-closed","hentry","topic-tag-2dmaterialsandmetals-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["285263","199"],"_bbp_author_ip":["23.39.172.22"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1673"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["284806"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","285263"],"_bbp_voice_count":["2"],"_bbp_reply_count":["17"],"_bbp_last_reply_id":["285905"],"_bbp_last_active_id":["285905"],"_bbp_last_active_time":["2023-05-26 08:54:50"]},"test":"radebetbtut-ac-za"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/284806","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\/284806\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=284806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}