{"id":44572,"date":"2020-05-30T14:47:53","date_gmt":"2020-05-30T14:47:53","guid":{"rendered":"\/forum\/forums\/topic\/incorrect-pressure-drop-from-fluent-simulation-of-pipe-flow\/"},"modified":"2020-05-30T14:47:53","modified_gmt":"2020-05-30T14:47:53","slug":"incorrect-pressure-drop-from-fluent-simulation-of-pipe-flow","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/incorrect-pressure-drop-from-fluent-simulation-of-pipe-flow\/","title":{"rendered":"Incorrect pressure drop from Fluent simulation of pipe flow"},"content":{"rendered":"<p>Hello,&nbsp;<\/p>\n<p><\/p>\n<p>I was having trouble obtaining reasonable solutions of pressure drop from Fluent. I created a very simple case of water flow in a circular pipe (files attached).&nbsp;<\/p>\n<p><\/p>\n<p>Pipe diameter: 1mm<br \/>Pipe length: 100 mm<br \/>Re=9950<br \/>Inlet velocity: 10 m\/s<br \/>Water density 998.2 kg\/m3; viscosity 0.001 Pa.s<br \/>Model: k-epsilon standard<\/p>\n<p><\/p>\n<p>It&#8217;s a pretty straight forward case, and the pressure drop calculated by many empirical models would be about 160 kPa. I obtained similar numbers from CFX simulation and COMSOL simulation. Yet using Fluent,&nbsp;the result is about twice as big, i.e., ~300 kPa.&nbsp;<\/p>\n<p><\/p>\n<p>I tried several different cases and always got over-predicted pressure using Fluent. I also tried different mesh, yet didn&#8217;t make it work.&nbsp;<\/p>\n<p><\/p>\n<p>This is a pretty straight forward case. I don&#8217;t know where I might have problem. I guess I might have some very stupid rookie mistake somewhere.&nbsp;<\/p>\n<p><\/p>\n<p>Please advise.&nbsp;<\/p>\n<p><\/p>\n<p>Many thanks.&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-44572","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["16753"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["4317"],"_bbp_subscription":["240087"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["44572"],"_bbp_forum_id":["27792"],"_bbp_engagement":["59","165116"],"_bbp_voice_count":["2"],"_bbp_reply_count":["8"],"_bbp_last_reply_id":["116548"],"_bbp_last_active_id":["116548"],"_bbp_last_active_time":["2020-06-03 00:00:26"]},"test":"alexc"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/44572","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\/44572\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=44572"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}