{"id":243661,"date":"2022-12-10T15:57:14","date_gmt":"2022-12-10T15:57:14","guid":{"rendered":"\/forum\/forums\/topic\/defining-liquid-viscosity-using-temperature-dependent-polynomial-fluent\/"},"modified":"2022-12-11T18:30:11","modified_gmt":"2022-12-11T18:30:11","slug":"defining-liquid-viscosity-using-temperature-dependent-polynomial-fluent","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/defining-liquid-viscosity-using-temperature-dependent-polynomial-fluent\/","title":{"rendered":"Defining liquid viscosity using temperature dependent polynomial &#8211; Fluent"},"content":{"rendered":"<p>Hi,<\/p>\n<p>I&#8217;m trying to define viscosity of a liquid as a temperarture dependent polynomial function in Fluent.<\/p>\n<p>I plotted the experiment data in Excel to get the trend line and polynomial equation. Below is the Excel polynomial graph and function.&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" title=\"Polynomial equation and trend line based on experimental data\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/12\/10-12-2022-1670687222-Excel poly.png\" alt=\"\" width=\"725\" height=\"442\"><\/p>\n<p>When I tried to enter the coeffients in Fluent to define viscosity, <span>I get a completely wrong graph.<\/span>&nbsp;<\/p>\n<p>Below is the graph I got from Fluent to the coeffients from the above equation.<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/12\/10-12-2022-1670687382-Fluent poly.png\" alt=\"\"><\/p>\n<p>Can someone pls tell me what I am doing wrong here?&nbsp;<\/p>\n<p>Thanks in advance,&nbsp;<\/p>\n<p>Best regards,<\/p>\n<p>Waruna<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-243661","topic","type-topic","status-closed","hentry","topic-tag-fluent-cfd-ansys-1","topic-tag-custom-materials-1","topic-tag-material-properties","topic-tag-piece-wise-polynomials","topic-tag-viscosity"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["265715","254012","22555"],"_bbp_author_ip":["23.192.164.14"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1650"],"_bbp_likes_count":["0"],"_bbp_status":["publish"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["243661"],"_bbp_forum_id":["27792"],"_bbp_engagement":["22555","254012","265715"],"_bbp_voice_count":["3"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["243748"],"_bbp_last_active_id":["243748"],"_bbp_last_active_time":["2022-12-12 12:25:58"]},"test":"w-maddumageherts-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/243661","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\/243661\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=243661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}