{"id":311732,"date":"2023-10-16T21:28:51","date_gmt":"2023-10-16T21:28:51","guid":{"rendered":"\/forum\/forums\/topic\/what-happens-when-temperature-exceeds-material-propert-data\/"},"modified":"2023-10-16T21:28:51","modified_gmt":"2023-10-16T21:28:51","slug":"what-happens-when-temperature-exceeds-material-propert-data","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/what-happens-when-temperature-exceeds-material-propert-data\/","title":{"rendered":"What happens when temperature exceeds material propert data?"},"content":{"rendered":"

Hello, I am currently working on a one-way transient thermal and transient structural simulation. I am defining temperature dependent material properties in a command object inserted in transient thermal and structural using the MPTEMP and MPDATA commands. <\/p>\n

In transient thermal, when I define the enthalpy (ENTH) material property as the following, I get warnings saying the temperature exceeds the maximum defined temperature, though the simulation still runs:<\/p>\n

<\/p>\n

However, if I add an additional enthalpy data point of 8.4766e+09 for 5000°C, which is the same value as I had for 1600°C, I get the following error:<\/p>\n

\n

 *** ERROR ***                           CP =       0.594   TIME= 17:08:12
 Material property ENTH must be input with increasing values as the     
 temperature increases.  The MPDATA command is ignored.       <\/p>\n<\/div>\n

If ANSYS was just using the enthalpy value of 8.4766e+09 corresponding to 1600°C for all temperatures above 1600°C, it seems like I would not get this error. <\/p>\n

What happens to the enthalpy in the case where I get a warning but the simulation still runs? <\/p>\n

 <\/p>\n

ALSO: For thermal conductivity (KXX) I defined a value of 30.5 at 1600°C, and warnings again occur if I go above 1600°C. However, if a I add another thermal conductivity data point of 30.5 at 5000°C, I do not get an error like I do with the enthalpy. It seems like thermal conductivity and enthalpy are being treated differerently.<\/p>\n

If I do not include the 5000°C data point, what does ANSYS do for the thermal conductivity? <\/p>\n

 <\/p>\n

 <\/p>\n

Thank you!<\/p>\n","protected":false},"template":"","class_list":["post-311732","topic","type-topic","status-closed","hentry","topic-tag-ansys-transient-thermal-2","topic-tag-apdl","topic-tag-command-objects","topic-tag-material-properties","topic-tag-transient-structural"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["168004","3937"],"_bbp_author_ip":["96.7.218.215"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2763"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["311732"],"_bbp_forum_id":["27791"],"_bbp_engagement":["3937","168004"],"_bbp_voice_count":["2"],"_bbp_reply_count":["13"],"_bbp_last_reply_id":["317856"],"_bbp_last_active_id":["317856"],"_bbp_last_active_time":["2023-11-15 18:11:44"]},"test":"rgdiscovery"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/311732","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\/311732\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=311732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}