{"id":306357,"date":"2023-09-12T13:36:26","date_gmt":"2023-09-12T13:36:26","guid":{"rendered":"\/forum\/forums\/topic\/steady-state-vof-of-impinging-jets\/"},"modified":"2023-09-12T13:36:26","modified_gmt":"2023-09-12T13:36:26","slug":"steady-state-vof-of-impinging-jets","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/steady-state-vof-of-impinging-jets\/","title":{"rendered":"Steady state VOF of impinging jet(s)"},"content":{"rendered":"<p>Hello all,<\/p>\n<p>I&#8217;m struggling with setting up a multiphase simulation of an impinging jet and I would like some help with troubleshooting.&nbsp;<\/p>\n<p>The case is this: I have a certain numer of segments arranged in a circular pattern, and a system supplying fluid from jets located on the outer radius. One such segment is shown in the screenshot below.<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/12-09-2023-1694523781-mceclip0.png\"><\/p>\n<p>In this example, I have considered the segment on the immediate right of this one to be its mirror image, therefore a symmetry axis on the right hand side. The left side is &#8220;empty&#8221; (outlet BC) in this case, as I am currently trying to get the first piece to work before setting up the next one.<\/p>\n<p>The model setup is (briefly summarized):<\/p>\n<ul>\n<li>steady state<\/li>\n<li>gravity (y=-9.81)<\/li>\n<li>volume of fluid with implicit vfp and body forces<\/li>\n<li>k-epsilon turbulent viscous model<\/li>\n<li>phases are air and water with a surface tension coefficient of 0.073 and wall adhesion turned on<\/li>\n<li>water enters the inlet at 2 m\/s<\/li>\n<li>SIMPLE pressure velocity coupling<\/li>\n<\/ul>\n<p>More details can be provided upon request as I&#8217;m at this moment uncertain which parameters are the most crucial to consider. I&#8217;ve kept most of the solver settings as default.<\/p>\n<p>When I run this setup the right hand side of the jet &#8220;fills up&#8221; with water, as shown in the following screenshot. I would suspect some flow recirculation as a result of the jet on the other side of the symmetry axis, as has been shown experimentally, but it seems strange to me that the fountain created in my simulation is this large..<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/12-09-2023-1694525451-mceclip4.png\" width=\"679\" height=\"491\"> <img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/12-09-2023-1694525221-mceclip2.png\"><\/p>\n<p>&nbsp;<\/p>\n<p>The velocity fields look as follows:<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/12-09-2023-1694525422-mceclip3.png\"><\/p>\n<p>&nbsp;<\/p>\n<p>I&#8217;ve also tried to setup another model similar to this one, only expanded to include the next segment on the left of the first one, but this model (with more or less the same setup) is not solvable.<\/p>\n<p>What can I do to improve the model?<\/p>\n","protected":false},"template":"","class_list":["post-306357","topic","type-topic","status-closed","hentry","topic-tag-fluent-cfd-ansys-1","topic-tag-multiphase_models-1","topic-tag-flat-jet","topic-tag-ImplicitVOF-1","topic-tag-steady-state"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["293215","199"],"_bbp_author_ip":["96.7.218.215"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["955"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["306357"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","293215"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["306438"],"_bbp_last_active_id":["306438"],"_bbp_last_active_time":["2023-09-12 16:53:10"]},"test":"erling-gjesetkit-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/306357","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\/306357\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=306357"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}