{"id":51088,"date":"2021-01-06T19:25:11","date_gmt":"2021-01-06T19:25:11","guid":{"rendered":"\/forum\/forums\/topic\/laminar-or-turbulent-flow\/"},"modified":"2021-01-06T19:25:11","modified_gmt":"2021-01-06T19:25:11","slug":"laminar-or-turbulent-flow","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/laminar-or-turbulent-flow\/","title":{"rendered":"Laminar or turbulent flow?"},"content":{"rendered":"<p>Hello everyone,nI am trying to simulate different pipe flows with some obstacles inside:nstationary ones &#8211; these cases are often unable to achieve steady state and transient run is needed, but behaviour of a system is not perfectly repetitve over time;nrotors, which are moved due to forces exerted by fluid flow with use of six do solver &#8211; these are of course inherently unsteadynI am dealing with low Re numbers, like 1400, 1900 etc. which are calculated with respect to diameter of a pipe as a characteristic length and this would indicate laminar flow. Medium inside a pipe is water. However, due to unsteadiness of both cases and presence of such obstacles in flow I am not quite sure if I should use a laminar model or tubulent one (maybe even with some transition model turned on?) Or maybe I should calculate Reynolds number with respect to different characteristic length? I would be really grateful for any tips.nThank you in advance for your help.n<\/p>\n","protected":false},"template":"","class_list":["post-51088","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["23350"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":["m???"],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["1791"],"_bbp_subscription":["231909"],"_bbpmt_movedon":["2022-08-26 07:29:23"],"_bbpmt_movedfrom":["27819"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["51088"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","184818"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["137969"],"_bbp_last_active_id":["137969"],"_bbp_last_active_time":["2021-01-07 13:49:06"]},"test":"nabuzor"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/51088","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\/51088\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=51088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}