{"id":366769,"date":"2024-05-14T12:30:10","date_gmt":"2024-05-14T12:30:10","guid":{"rendered":"\/forum\/forums\/topic\/ignition-doesnt-start-with-gri-mech-for-methane\/"},"modified":"2024-05-14T12:30:10","modified_gmt":"2024-05-14T12:30:10","slug":"ignition-doesnt-start-with-gri-mech-for-methane","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ignition-doesnt-start-with-gri-mech-for-methane\/","title":{"rendered":"Ignition doesn&#8217;t start with GRI-Mech for methane"},"content":{"rendered":"<p>Hello,<\/p>\n<p>I already checked others forum but it couldn&#8217;t fix my problem, so I would like to know if someone can help me please.<\/p>\n<p>I have an ignition issue with my combustion simulation.<\/p>\n<p>My simulation uses the GRI 3.0 mechanism, for non premixed air-methane combustion, but the ignition doesn&#8217;t start&#8230; When I do the same simulation with methane-air mixture (in species transport model), it works.<\/p>\n<p>Do you know how I can solve this issue please ?&nbsp;<\/p>\n<p>Here are my parameters :<\/p>\n<p>Steady combustion, with energy model, k-e viscous model and Species Transport model (using GRI 3.0 + Eddy Dissipation Concept)<br \/>Air inlet velocity (I tried 2,4 and 6,1, but it doesn&#8217;t works&#8230;), 300K<br \/>Fuel inlet velocity 5 m\/s, 300K, 100% methane<br \/>Outlet pressure of 101kPa<br \/>Coupled Pressure scheme, and 2nd order for spacial discretisazions.<br \/>I&#8217;m trying to reproduce a simulation I found on a paper, to learn and improve in combustion simulations. Hence, normally these parameters are correct (according to the paper, which succeed to do simulations with these parameters&#8230;).<\/p>\n<p>So I don&#8217;t get why my mixture doesn&#8217;t ignite, can you help me please ?<\/p>\n<p>PS : The mesh is normally correct and is more precise than the mesh of the paper.<\/p>\n<p>Thanks.<\/p>\n","protected":false},"template":"","class_list":["post-366769","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["110805","101181"],"_bbp_author_ip":["184.24.96.207"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["854"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["366769"],"_bbp_forum_id":["27792"],"_bbp_engagement":["101181","110805"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["395009"],"_bbp_last_active_id":["395009"],"_bbp_last_active_time":["2024-11-22 17:21:28"]},"test":"felix512hotmail-fr"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/366769","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\/366769\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=366769"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}