{"id":45354,"date":"2020-06-22T17:21:01","date_gmt":"2020-06-22T17:21:01","guid":{"rendered":"\/forum\/forums\/topic\/floating-point-error-solidificaiton-melting-with-pcm-2d\/"},"modified":"2020-06-22T17:21:01","modified_gmt":"2020-06-22T17:21:01","slug":"floating-point-error-solidificaiton-melting-with-pcm-2d","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/floating-point-error-solidificaiton-melting-with-pcm-2d\/","title":{"rendered":"Floating Point Error: Solidificaiton\/Melting with PCM 2D"},"content":{"rendered":"

 <\/p>\n

<\/p>\n

MESH DETAILS:<\/strong><\/span><\/p>\n

<\/p>\n

\"Mesh\"<\/p>\n

<\/p>\n

The inlet is the rectangle located on the top right corner of the mesh with the outlet right beside it as the smaller rectangle.<\/p>\n

<\/p>\n

the left most side is a cut out where two copper fins would be that wall will be set up as copper later on.<\/p>\n

<\/p>\n

\"Mesh<\/p>\n

<\/p>\n

\"Skewness\"<\/p>\n

<\/p>\n

\"Edge1\"<\/p>\n

<\/p>\n

\"Edge<\/p>\n

<\/p>\n

\"Edge2\"<\/p>\n

<\/p>\n

\"Edge<\/p>\n

<\/p>\n

\"Face<\/p>\n

<\/p>\n

\"Face<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

SETUP:<\/strong><\/span><\/p>\n

<\/p>\n

\"Viscous<\/p>\n

<\/p>\n

\"Solidification\"<\/p>\n

<\/p>\n

Energy is also enabled.<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

My fluid is a PCM with 3 piecewise-linear points for Density, Specific heat, and thermal conductivity.<\/p>\n

<\/p>\n

\"pcm\"<\/p>\n

<\/p>\n

I am using standard initialization at 273.15k no other inputs modified.
I am running the calculation using adaptive time stepping method with the following parameters:<\/p>\n

<\/p>\n

\"Time<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

The floating point error occurs withing 10 iterations of the start of the calculation, with the following output:<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

\"part<\/p>\n

<\/p>\n

\"part<\/p>\n

<\/p>\n

\"part<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

I am not too sure what else I need to do to fix this error. I’ve tried the time step size and changing mesh stats. <\/p>\n

Please let me know if you have any ideas or require any more information.<\/p>\n

Sincerely,<\/p>\n

<\/p>\n

Ryan<\/p>\n

<\/p>\n

 <\/p>\n","protected":false},"template":"","class_list":["post-45354","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["17535"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["557"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["45354"],"_bbp_forum_id":["27792"],"_bbp_engagement":["118","154181"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["118675"],"_bbp_last_active_id":["118675"],"_bbp_last_active_time":["2020-06-23 15:08:34"]},"test":"rlester5"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/45354","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\/45354\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=45354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}