{"id":37676,"date":"2019-09-13T14:10:19","date_gmt":"2019-09-13T14:10:19","guid":{"rendered":"\/forum\/forums\/topic\/problem-with-convergence-in-methane-combustion-using-edm-model\/"},"modified":"2019-09-13T14:10:19","modified_gmt":"2019-09-13T14:10:19","slug":"problem-with-convergence-in-methane-combustion-using-edm-model","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/problem-with-convergence-in-methane-combustion-using-edm-model\/","title":{"rendered":"problem with convergence in methane combustion using EDM model?"},"content":{"rendered":"<p>i am working on a methane-combustion problem solved using EDM model. The model works fine and the entire system temperature wrt to iteration became constant after 16000 iteration as shown below&nbsp;<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/bc9f8331-771f-4a9f-95c3-a86b00caf18f\/997ae858-d7fb-4ad1-8b73-aac700e5cb2f_1.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p><strong>But as i changed my fuel to some other with different methane composition, the temperature is not converging as before, infact cyclic repeating temperature vs iteration profile is being obtained what should i do regarding this. temperature vs iteration plots are shown below.<\/strong><\/p>\n<p><\/p>\n<p><strong><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/bc9f8331-771f-4a9f-95c3-a86b00caf18f\/51666e4f-6ae8-418f-8839-aac700e6f5aa_convergance-plot-till-42000-2353645-mesh.jpg?width=690&amp;upscale=false\" alt=\"\"><\/strong><\/p>\n<p><\/p>\n<p><strong>upto&nbsp;42000 iteration as shown above all looks fine seems like temperature is going to converge but after 42000 temperature goes to zero then again starts the same process i have checked the process to 1 lac iteration &#8230;&#8230;it reduced to zero again at around 68000&nbsp; again its repeating continuous&nbsp;cyclic process<\/strong><\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p><strong><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/bc9f8331-771f-4a9f-95c3-a86b00caf18f\/06f102fa-87d6-4772-9941-aac700e700b8_convergance-plot-2353645-mesh.jpg?width=690&amp;upscale=false\" alt=\"\"><\/strong><\/p>\n<p><\/p>\n<p><strong>Kindly someone can suggest me some remedies&nbsp;for this &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.. going for more refined mesh an option for this ?<\/strong><\/p>\n<p><\/p>\n<p><strong>any help will be highly&nbsp;appreciated.<\/strong><\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-37676","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["9854"],"_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":["354"],"_bbp_subscription":["235690"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["37676"],"_bbp_forum_id":["27792"],"_bbp_engagement":["22555","154844","155620"],"_bbp_voice_count":["3"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["94306"],"_bbp_last_active_id":["94306"],"_bbp_last_active_time":["2019-09-15 14:52:28"]},"test":"sooraj546"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/37676","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\/37676\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=37676"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}