{"id":317312,"date":"2023-11-12T02:28:46","date_gmt":"2023-11-12T02:28:46","guid":{"rendered":"\/forum\/forums\/topic\/boundary-conditions-farfield-pressure-definition-for-supersonic-flow\/"},"modified":"2023-11-12T02:28:46","modified_gmt":"2023-11-12T02:28:46","slug":"boundary-conditions-farfield-pressure-definition-for-supersonic-flow","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boundary-conditions-farfield-pressure-definition-for-supersonic-flow\/","title":{"rendered":"Boundary Conditions: Farfield Pressure definition for supersonic flow"},"content":{"rendered":"<p>I am currently working on a 2D analysis for a supersonic flow (Mach= 2.13) over an airfoil. However, it is not clear to me how to define the farfield pressure.<\/p>\n<p>I tried to calculate it using the following &#8211; isentropic &#8211; relation:<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/12-11-2023-1699754888-mceclip0.png\"><\/p>\n<p>Total pressure: 1 atm<br \/>Static pressure: Farfield pressure at mach= 2.13 (this is the variable I want to define in the analysis)<br \/>Specific heats coefficient= 1.4<\/p>\n<p>I suspect I didn&#8217;t chose the right value for the Total Presure. What might be worth to check? What could have gone wrong with my calculations?<\/p>\n<p>Worth to mention that I am using an absolute pressure. Hence, I defined the gauge pressure as 0 (Operating Conditions).<\/p>\n","protected":false},"template":"","class_list":["post-317312","topic","type-topic","status-closed","hentry","topic-tag-fluent-ansys-1","topic-tag-fluent-cfd-ansys-1","topic-tag-supersonic","topic-tag-supersonic-flow-1","topic-tag-supersonicflow-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["301994","13659"],"_bbp_author_ip":["96.7.74.191"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1357"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["317312"],"_bbp_forum_id":["27792"],"_bbp_engagement":["13659","301994"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["317501"],"_bbp_last_active_id":["317501"],"_bbp_last_active_time":["2023-11-13 19:37:43"]},"test":"6380soyunaq-mx"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/317312","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\/317312\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=317312"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}