{"id":39501,"date":"2019-12-09T22:37:38","date_gmt":"2019-12-09T22:37:38","guid":{"rendered":"\/forum\/forums\/topic\/boussinesq-approximation\/"},"modified":"2019-12-09T22:37:38","modified_gmt":"2019-12-09T22:37:38","slug":"boussinesq-approximation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boussinesq-approximation\/","title":{"rendered":"Boussinesq approximation"},"content":{"rendered":"<p>Hello everyone<br \/>\nMy case of studying is naturel convection, in which I&#8217;m using boussinisq approximation with a density equal to 1.177 kg\/m^3 and a thermal expansion coefficient equals to 0.0032 1\/k and a reference temperature equals to 300k . The inlet is type pressure inlet with atmospheric pressure, the same for the outlet.<br \/>\nThe problem is, I got a high velocity (0.7 m\/s) as a maximum, but it should be (0.2m\/s ) as a maximum which is logique because it&#8217;s just a naturel convection and 0.7 m\/s it very high. Knowing that my case is transient and if I use density depend temperature i got a good velocity (0.2 m\/s) but distribution form is not what I&#8217;m looking for. But if I use boussinisq I got a good distribution form with a high velocity.<br \/>\nSo can someone please help me out in this&#8230;.<br \/>\nI&#8217;ll be so gratfull for any answers from you.<br \/>\nBest regards<br \/>\nDounia<\/p>\n","protected":false},"template":"","class_list":["post-39501","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["11680"],"_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":["4714"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["39501"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","22555","165478"],"_bbp_voice_count":["3"],"_bbp_reply_count":["20"],"_bbp_last_reply_id":["101144"],"_bbp_last_active_id":["101144"],"_bbp_last_active_time":["2019-12-18 15:57:58"]},"test":"dounia"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/39501","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\/39501\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=39501"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}