{"id":317446,"date":"2023-11-13T15:12:23","date_gmt":"2023-11-13T15:12:23","guid":{"rendered":"\/forum\/forums\/topic\/methane-air-combustion\/"},"modified":"2023-11-13T15:22:14","modified_gmt":"2023-11-13T15:22:14","slug":"methane-air-combustion","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/methane-air-combustion\/","title":{"rendered":"methane-air combustion in Ansys Fluent"},"content":{"rendered":"<p>Hello everyone, i&#8217;m doing a simulation of methane-air combustion to find out the flame speed.<\/p>\n<p>I&#8217;m using a vertical 2D vessel with an air inlet and a fuel inlet at the bottom and an outlet at the top. My general settings are 2D, axisymmetric, transient, because i&#8217;m using a species transport model with eddy-dissipation turbolence model. Furthermore i have LES viscous model. I&#8217;m considering air and fuel inlets as mass-flow inlets and outlet as a pressure-outlet.<\/p>\n<p>I&#8217;m using simple solution method and a second bounded order implicit transient formulation, but when i run the simulation with adaptve time advancement and CFL-based methode, it takes a very long time and never converges.<\/p>\n<p>I have tried changing a lot of parameters but still have not found a solution to my problem, can you help me with any hints?<\/p>\n<p>Best reguards,<\/p>\n<p>alessio.<\/p>\n","protected":false},"template":"","class_list":["post-317446","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["302079","8124"],"_bbp_author_ip":["96.7.218.215"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["469"],"_edit_lock":["1699888865:243717"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["317446"],"_bbp_forum_id":["27792"],"_bbp_engagement":["8124","302079"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["318383"],"_bbp_last_active_id":["318383"],"_bbp_last_active_time":["2023-11-20 05:25:06"]},"test":"alessio-pesciaiolistudio-unibo-it"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/317446","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\/317446\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=317446"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}