{"id":397319,"date":"2024-12-12T19:25:05","date_gmt":"2024-12-12T19:25:05","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cfd-post-case-comparison-2\/"},"modified":"2024-12-12T19:25:05","modified_gmt":"2024-12-12T19:25:05","slug":"cfd-post-case-comparison-2","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cfd-post-case-comparison-2\/","title":{"rendered":"CFD post Case comparison"},"content":{"rendered":"<p>&lt;p&gt;I want to copare the Cp distribtution of two fluent cases in CFD post, how to plot a Pressure Coeficient difference contour.&lt;br&gt;basically I want the contour of the difference.&lt;br&gt;&lt;br&gt;There is an option of &#8220;case comparison&#8221; in the CFD post software, though i didnt understand how to apply that properly.&lt;br&gt;&lt;br&gt;basically the two cases have different mesh files, case files and solution files.&lt;br&gt;&lt;br&gt;Though in geometry they are the same apart from the front splitter.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;when looking at the lift force report per zone in fluent i find that adding that splitter to the otherwise identical geometry model, the &#8220;car body&#8221; wall has gained an amount of 79N of lift in itslef, the splitter has got a difference of &#8211; 58N (negative lift).&lt;br&gt;&lt;br&gt;the other walls like rear spoiler, wheels etc, have got very similar amounts of lift force, only the body has had a different lift due to the flow interaction i assume.&lt;br&gt;&lt;br&gt;this is why i want to make a contour of the difference between the two. a plot of the differences only so i can see where the Cp is different and understand what is happening&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/12-12-2024-1734031252-mceclip1.png\" \/>&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/12-12-2024-1734031034-mceclip0.png\" \/>&lt;br&gt;&lt;br&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-397319","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["397319"],"_bbp_author_ip":["41.254.71.107"],"_bbp_last_reply_id":["397855"],"_bbp_last_active_id":["397855"],"_bbp_last_active_time":["2024-12-18 13:20:52"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["266911","15845"],"_btv_view_count":["220"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1734031565:266911"],"_bbp_likes_count":["1"],"_bbp_subscription":["15845"]},"test":"eng-26248uob-edu-ly"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/397319","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\/397319\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=397319"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}