Hey I want to setup my own Materialdatabase, the problem I am having is that after I set one property the unit of the next property doesn´t change and it seems that in the .scm file it throws a random error because it is trying to set the value of the previous property to the new property.<\/p>\n
The Terminal in Fluent then outputs either:<\/p>\n
Error: CAR: invalid argument [1]: wrong type [not a pair]<\/span><\/p>\n Error Object: ()<\/span><\/p>\n Error: GENERAL-CAR-CDR: invalid argument [1]: improper list<\/p>\n And the .scm file then looks like this (without the header):<\/p>\n <\/span><\/span><\/span><\/p>\n ( )<\/p>\n And the error is obvious because saturation-pressure and vaporization-temperature have the same blocks and a expression is not available for vaporization-temperature (only UDF or constant)<\/p>\n Ignore the unfilled properties, the same Error (CAR-CDR) throws as well, when all are filled, which again is not possible because the .scm file doesn´t write properly<\/p>\n Answer from the ANSYS Assistant is included<\/p>\n Thanks<\/p>\n","protected":false},"template":"","class_list":["post-461778","topic","type-topic","status-publish","hentry","topic-tag-database","topic-tag-databases-2","topic-tag-udm"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27815"],"_bbp_topic_id":["461778"],"_bbp_subscription":["637750","684966"],"_bbp_author_ip":[null],"_bbp_last_reply_id":["461791"],"_bbp_last_active_id":["461791"],"_bbp_last_active_time":["2026-07-24 08:02:44"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_engagement":["1","684966"],"_bbp_likes_count":["0"],"_btv_view_count":["13"],"application":[null],"emailnotification":[null],"_bbp_topic_status":["unanswered"],"_bbp_voice_count":["2"]},"test":"ben-ludwigrwth-aachen-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/461778","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\/461778\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=461778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
And\/ or<\/p>\n
(lithium-gas fluid
(chemical-formula . li)
(specific-heat)
(density)
(latent-heat)
(thermal-conductivity)
(vaporization-temperature (user-defined “lithium_sat_temp::libudf”) (constant . 1615.) (expression . “6.58e-5 [kg m^-1 s^-1] * exp(1153.5 [K]\/StaticTemperature)”))
(viscosity (expression . “6.58e-5 [kg m^-1 s^-1] * exp(1153.5 [K]\/StaticTemperature)”) (constant . 0.0001))
(saturation-pressure (constant . 1615.) (user-defined “lithium_sat_temp::libudf”) (expression . “6.58e-5 [kg m^-1 s^-1] * exp(1153.5 [K]\/StaticTemperature)”))
)<\/p>\n