{"id":255921,"date":"2020-09-01T12:16:27","date_gmt":"2020-09-01T12:16:27","guid":{"rendered":"\/forum\/forums\/topic\/cv-flow-coefficient-of-valves-in-aim\/"},"modified":"2023-03-09T07:52:35","modified_gmt":"2023-03-09T07:52:35","slug":"cv-flow-coefficient-of-valves-in-aim","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cv-flow-coefficient-of-valves-in-aim\/","title":{"rendered":"Cv (Flow coefficient of valves) in AIM"},"content":{"rendered":"<p> Has anybody had much success with calculating the CV of valves ?&nbsp; <\/p>\n<p> I can get calculations to work in the results section but the units seem to be off. I am double checking the equations to make sure units and order of magnitude is correct. Values I get are 150% too high. Geoetry scale imported is correct. <\/p>\n<p>&nbsp;<\/p>\n<p> I&#8217;m also looking to capture this process in the ACT app builder too! <\/p>\n<p>&nbsp;<\/p>\n<p> If anyone has any suggestions or recommendations that would be great.&nbsp; <\/p>\n<p>&nbsp;<\/p>\n<p> My method:&nbsp; <\/p>\n<p> Flow inputs: <\/p>\n<p> 20D upstream and 7D downstream <\/p>\n<p> Mass flow inlet 40 kg\/s <\/p>\n<p> Pressure outlet: 997.7 kPa <\/p>\n<p> Wall boundary <\/p>\n<p> med-high mesh <\/p>\n<p> Results: <\/p>\n<p> Two planes created to capture deltaP <\/p>\n<p> &nbsp; &nbsp; 1st Plane at 18D upstream <\/p>\n<p> &nbsp; &nbsp; 2nd 1D Plane downstream <\/p>\n<p> Calculation for deltaP executed <\/p>\n<p> Calulation for Volumetric flow calculated form MassFlow <\/p>\n<p>&nbsp;<\/p>\n<p> Cv eqaution then calculated. Please see images to help explain in more detail.&nbsp; <\/p>\n<p>&nbsp;<\/p>\n<p> The pressure drop should be 1 PSI or 6.89kPa or 0.00689MPa for a given flow to achieve Cv value. In the pictures the pressure drop is lower than 1 PSI and the CV calculated is 841 (750 expected as from physical testing) <\/p>\n<p>&nbsp;<\/p>\n<p> Other than that maybe my geometry is wrong.&nbsp; <\/p>\n<p>&nbsp;<\/p>\n<p> Thanks for your help<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/discovery\/2023\/03\/31-1.jpg\">&nbsp;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/discovery\/2023\/03\/31-2.jpg\">&nbsp;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/discovery\/2023\/03\/31-3.jpg\">&nbsp;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/discovery\/2023\/03\/31-4.jpg\">&nbsp;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/discovery\/2023\/03\/31-5.jpg\">&nbsp; <\/p>\n","protected":false},"template":"","class_list":["post-255921","topic","type-topic","status-closed","hentry","topic-tag-discovery-aim-2","topic-tag-fluid-volume","topic-tag-fluids"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["278845"],"_bbp_likes_count":["0"],"_btv_view_count":["956"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["255921"],"_bbp_forum_id":["27789"],"_bbp_engagement":["126","278845"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["267936"],"_bbp_last_active_id":["267936"],"_bbp_last_active_time":["2020-09-07 07:10:19"]},"test":"soneillcartencontrols-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/255921","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\/255921\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=255921"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}