{"id":166477,"date":"2022-02-17T02:18:43","date_gmt":"2022-02-17T02:18:43","guid":{"rendered":"\/forum\/forums\/topic\/high-temperature-shoot-up-and-high-mach-flow\/"},"modified":"2022-02-18T19:25:51","modified_gmt":"2022-02-18T19:25:51","slug":"high-temperature-shoot-up-and-high-mach-flow","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/high-temperature-shoot-up-and-high-mach-flow\/","title":{"rendered":"high Temperature shoot up and high mach flow."},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Dear Friend,<\/p>\n<p>I was solving the airflow through the Tangle, in order to solve the problem, I choose the flowing fluid as &quot;air&quot; as compressible fluid. I am doing this as a control experiment. Pinlet (Gauge Pressure) :3 atm and Pout(Gauge Pressure) is 1atm. The temperature of the fluid is 300K (constant for inlet and outlet) . <\/p>\n<p>Solver: Explicit, ROE and Grad: Node-based and Flow: Second upwind scheme. <\/p>\n<p>Initialization: Hybrid <\/p>\n<p>Steady-state problem: <\/p>\n<p>Gravity: Y-axis :-9.81 <\/p>\n<p>Mach flow: Vel\/Sqrt(1.4*287*Totat Temp) and Courant Number:1 and <\/p>\n<p>I am not sure, why I am getting such a high temperature and Impossible Mach number through the T-channel. This result in the CFD post doesn&#039;t make any sense. I am not sure where I am making mistakes in defining the BC or meshing issue., solver, or anything else. Do I need to put any operating pressure, if I am just simulating for the flow at atmospheric conditions? any suggestion will be helpful. <\/p>\n<p>Error shown by TUI for every iteration: Solver: &quot;&nbsp;time step reduced in 707 cells due to excessive temperature change<\/p>\n<p>&nbsp;temperature limited to 1.000000e+00 in 729 cells on zone 3&nbsp;<\/p>\n<p>&nbsp;temperature limited to 5.000000e+03 in 961 cells on zone 3&nbsp;<\/p>\n<p>&nbsp;&nbsp;200&nbsp;1.8851e+00&nbsp;5.7939e-01&nbsp;8.1209e-01&nbsp;7.1154e-01&nbsp;8.3318e-01&nbsp;0:00:00&nbsp;&nbsp;0 &quot;<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/645\/YWN4PWHDUBTT.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/645\/YWN4PWHDUBTT.png\" alt=\"image.png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-166477","topic","type-topic","status-closed","hentry","topic-tag-boundary-conditions","topic-tag-compressible-flow","topic-tag-fluent"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["2928"],"_bbp_likes_count":["0"],"_bbp_subscription":["241431"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["166477"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","166775"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["205828"],"_bbp_last_active_id":["205828"],"_bbp_last_active_time":["2022-02-18 19:25:51"]},"test":"88134c33056105b8e0ece9694a640e55816f65a4"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/166477","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\/166477\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=166477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}