{"id":391688,"date":"2024-10-29T07:45:23","date_gmt":"2024-10-29T07:45:23","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/k-w-model-and-y-value-and-ewfeulerian-wall-film-with-dpm\/"},"modified":"2024-10-29T07:45:23","modified_gmt":"2024-10-29T07:45:23","slug":"k-w-model-and-y-value-and-ewfeulerian-wall-film-with-dpm","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/k-w-model-and-y-value-and-ewfeulerian-wall-film-with-dpm\/","title":{"rendered":"k-w model and y+ value and EWF(Eulerian wall film) with DPM"},"content":{"rendered":"<p>&lt;p&gt;Hello, I&#8217;m using EWF(Eulerian Wall Film) Model + DPM to express the particle deposition.&lt;\/p&gt;&lt;p&gt;If I consider only &#8220;stick&#8221; to the wall, I have some questions about that.(neglecting rebound, splash, etc)&lt;\/p&gt;&lt;p&gt;As fas as i know, stick phenomenon is depending on (Vpn)^2(main stream velocity normal to the wall) and fluid density, surface tension.. etc&nbsp;&lt;\/p&gt;&lt;p&gt;Q. Do I need to make a fine mesh?(y+&lt;1)&lt;\/p&gt;<\/p>\n<ul>\n<li>In my personal oppinion, EWF makes virtual cell layers automatically between first cell and the wall because it has tiny thickness(~1e-9m) that&#8217;s why y+ is not important with k-w model and wall function.<\/li>\n<li>Or Nevertheless, EWF needs strict criteria of fine mesh(y+&lt;&lt;1) because thin film phenomenen is also depending on the particle flow near the wall<\/li>\n<\/ul>\n<p>&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-391688","topic","type-topic","status-publish","hentry","topic-tag-fluent-cfd-ansys-1","topic-tag-boundarylayers-1","topic-tag-dpm-boundary-condition-2","topic-tag-eulerian-wall-film","topic-tag-mesh","topic-tag-y-1","topic-tag-yplus"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["203.244.221.1"],"_btv_view_count":["266"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["199"],"_bbp_topic_id":["391688"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","47538"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["391770"],"_bbp_last_active_id":["391770"],"_bbp_last_active_time":["2024-10-29 14:53:23"]},"test":"pck2646g-skku-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/391688","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\/391688\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=391688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}