{"id":158406,"date":"2021-05-12T02:06:43","date_gmt":"2021-05-12T02:06:43","guid":{"rendered":"\/forum\/forums\/topic\/non-reflecting-boundary-condition-at-pressure-outlet\/"},"modified":"2021-05-14T05:49:17","modified_gmt":"2021-05-14T05:49:17","slug":"non-reflecting-boundary-condition-at-pressure-outlet","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/non-reflecting-boundary-condition-at-pressure-outlet\/","title":{"rendered":"Non Reflecting Boundary Condition at Pressure Outlet"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Currently, I am conducting <em>pressure based transient incompressible fluid flow in viscoelastic tube<\/em> in ANSYS fluent and I would like to create an <em>absorbing boundary condition<\/em> in the outlet of the tube.<\/p>\n<p>ANSYS Fluent already include <em>non-reflecting outlet boundary conditions (NRBC<\/em>) but only applies for ideal gas (compressible) flow.<\/p>\n<p>With <em>Pressure Far Field BC<\/em>, it is available only when density is calculated using ideal gas law.<\/p>\n<p>With <em>Outflow B<\/em>C, it cannot be used for unsteady flow with variable density.<\/p>\n<p><\/p>\n<\/p>\n<p>The study is couple analysis between transient structural and fluid flow (Fluent). I applied velocity sine wave at the inlet of the tube. and I found an option that shows <strong>Prevent Reverse Flow<\/strong> . <\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/648\/76H8Y45MKR6N.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/648\/76H8Y45MKR6N.png\" alt=\"Prevent Reverse Flow.PNG\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-158406","topic","type-topic","status-closed","hentry","topic-tag-2-way-coupled-fsi","topic-tag-ansys-fluent","topic-tag-outlet-boundary-condition"],"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":["2962"],"_bbp_likes_count":["0"],"_bbp_subscription":["37211"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["158406"],"_bbp_forum_id":["27792"],"_bbp_engagement":["62","37211","188322"],"_bbp_voice_count":["3"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["242873"],"_bbp_last_active_id":["242873"],"_bbp_last_active_time":["2022-12-04 14:21:31"]},"test":"sanda"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/158406","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\/158406\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=158406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}