{"id":244799,"date":"2022-12-23T12:28:19","date_gmt":"2022-12-23T12:28:19","guid":{"rendered":"\/forum\/forums\/topic\/issue-in-under-relaxation-factors\/"},"modified":"2022-12-23T12:28:19","modified_gmt":"2022-12-23T12:28:19","slug":"issue-in-under-relaxation-factors","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/issue-in-under-relaxation-factors\/","title":{"rendered":"Issue in under relaxation factors"},"content":{"rendered":"<p>Hello Everyone,<\/p>\n<p>I would like to know the influence of under relaxation factors.<\/p>\n<p>I did two same simulations with different relaxation factors. (Laminar, steady state case)<\/p>\n<p>a) In first simulation I am using COUPLED scheme and for initial 100 iterations I used 0.25 for species and energy and other is by default and after 100 iterations when reversed flow is over I changed from 0.25 to 0.99 and it converges very fast (within 1 hr) with proper downward pattern (residuals 1e-9).<\/p>\n<p>b) In second simulation I have choosen 0.95 relaxation factor for same case and solver from first iteration to till now, but its not converged yet for same residuals (1e-9) (more than 20 hr simulation).<\/p>\n<p>My question is that 1) Is it a right practice to change relaxation factor in middle of the simulation?<\/p>\n<p>2) Is it going to affect the final result?<\/p>\n<p>Thanks in advance.<\/p>\n<p>Regards,<\/p>\n<p>Vinay<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-244799","topic","type-topic","status-closed","hentry","topic-tag-fluent","topic-tag-under-relaxation-factors"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["262534","8124"],"_bbp_author_ip":["23.77.218.220"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["3465"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["244799"],"_bbp_forum_id":["27792"],"_bbp_engagement":["8124","262534"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["244935"],"_bbp_last_active_id":["244935"],"_bbp_last_active_time":["2022-12-27 18:39:33"]},"test":"164170007iitb-ac-in"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/244799","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\/244799\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=244799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}