{"id":51251,"date":"2021-01-13T18:45:32","date_gmt":"2021-01-13T18:45:32","guid":{"rendered":"\/forum\/forums\/topic\/fluent-species-density-udf\/"},"modified":"2021-01-13T18:45:32","modified_gmt":"2021-01-13T18:45:32","slug":"fluent-species-density-udf","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-species-density-udf\/","title":{"rendered":"Fluent &#8211; species &#8211; density &#8211; UDF"},"content":{"rendered":"<p>Hi,nI have two species (air + CO2) and I want to calculate the density of CO2 as it varies with temperature from the equation of state through a UDF. The density of the mixture is set as Incompressible Ideal Gas. I need the density of CO2 to calculate the ppm(volume) of CO2.nCO2 is assigned as species 0.ndensity0 = P * MW0 \/ (R_universal * T)nmy question is, P here is the static pressure which I can call via C_P(c,t) or I need to do something with the operating pressure as well?nThanks!n<\/p>\n","protected":false},"template":"","class_list":["post-51251","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["23515"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":["???$"],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["2058"],"_bbp_subscription":["236724"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["51251"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","4948","157976"],"_bbp_voice_count":["3"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["138927"],"_bbp_last_active_id":["138927"],"_bbp_last_active_time":["2021-01-15 18:22:44"]},"test":"dino"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/51251","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\/51251\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=51251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}