{"id":160686,"date":"2021-07-26T05:25:41","date_gmt":"2021-07-26T05:25:41","guid":{"rendered":"\/forum\/forums\/topic\/windkessel-model-reverse-flow-in-fluent-2020\/"},"modified":"2021-11-26T15:35:59","modified_gmt":"2021-11-26T15:35:59","slug":"windkessel-model-reverse-flow-in-fluent-2020","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/windkessel-model-reverse-flow-in-fluent-2020\/","title":{"rendered":"Windkessel model &#8211; Reverse flow in Fluent 2020"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hi,<\/p>\n<p>I am using Windkessel model to apply pressure outlet boundary condition for transient, turbulent flow simulation in Ansys Fluent 2020R2. The geometry is patient specific aorta, which consists of 2 inlets and 7 outlets. At the inlet, mass flow BC is applied and at the outlets, pressure outlet with windkessel udf is applied. <\/p>\n<p>While running the simulation, at few outlets, reverse flow is happening. This reverse flow affects the mass flow rate which I calculated at the end of the each time step for windkessel udf. <\/p>\n<p>So the error in mass flow rate transfer to the outlet pressure value and it cause the simulation to diverge.<\/p>\n<p>Would anyone help me to solve this issue?<\/p>\n<p>with regards,<\/p>\n<p>DK<\/p>\n","protected":false},"template":"","class_list":["post-160686","topic","type-topic","status-closed","hentry","topic-tag-divergence","topic-tag-fluent","topic-tag-pressure-outlet","topic-tag-reverse-flow-2","topic-tag-Windkesselmodel-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_old_reply_author_name_id":["Anonymous"],"_bbp_old_is_reply_anonymous_id":["false"],"_btv_view_count":["2358"],"_bbp_likes_count":["0"],"_bbp_subscription":["233547","268112"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["160686"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","134846","241606","268112"],"_bbp_voice_count":["4"],"_bbp_reply_count":["10"],"_bbp_last_reply_id":["241305"],"_bbp_last_active_id":["241305"],"_bbp_last_active_time":["2022-11-18 08:51:35"]},"test":"dhaya400"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/160686","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\/160686\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=160686"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}