{"id":222625,"date":"2022-07-28T20:11:44","date_gmt":"2022-07-28T20:11:44","guid":{"rendered":"\/forum\/forums\/topic\/pressure-decay-time-to-reach-ambient\/"},"modified":"2022-07-28T20:11:44","modified_gmt":"2022-07-28T20:11:44","slug":"pressure-decay-time-to-reach-ambient","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/pressure-decay-time-to-reach-ambient\/","title":{"rendered":"pressure decay &#8211; time to reach ambient"},"content":{"rendered":"<p>Hello, Being new to CFD and Fluent, I was hoping for some help w\/ a problem where I&#8217;m given an initial inlet pressure and need to determine the leakdown time to reach ambient pressure.&nbsp; &nbsp;I want to run the sim starting with the flow volume full of oil and have a piston push out a known portion of that volume.&nbsp; &nbsp;Will this require dynamic mesh setup in a transient analysis, or can it be determined with a steady state analysis and some hand calcs using the volumetric flow rate from the SS results?&nbsp; Thanks in advance!<\/p>\n","protected":false},"template":"","class_list":["post-222625","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["260784","852","199"],"_bbp_author_ip":["23.218.93.53"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["310"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["222625"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","852","260784"],"_bbp_voice_count":["3"],"_bbp_reply_count":["21"],"_bbp_last_reply_id":["234299"],"_bbp_last_active_id":["234299"],"_bbp_last_active_time":["2022-09-02 05:33:56"]},"test":"jmossborgwarner-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/222625","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\/222625\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=222625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}