{"id":365215,"date":"2024-05-02T13:17:25","date_gmt":"2024-05-02T13:17:25","guid":{"rendered":"\/forum\/forums\/reply\/365215\/"},"modified":"2024-05-02T13:17:25","modified_gmt":"2024-05-02T13:17:25","slug":"365215","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/365215\/","title":{"rendered":"Reply To: Pressure drop through a hole in a pipe"},"content":{"rendered":"<p>&lt;p&gt;pipe dia = 21mm&lt;\/p&gt;&lt;p&gt;hole size = 5 &#8211; 8.5mm at equal distance&lt;\/p&gt;&lt;p&gt;around 1.7M cells with inflation on the pipe wall (stair step mesh), proximity sizing for each hole and hole enclosure, minimum orthogonal quality 0.2.&nbsp;&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/02-05-2024-1714655437-residual.png\" alt=\"\" width=\"1073\" height=\"581\" \/>&lt;\/p&gt;&lt;p&gt;velocity profile (target average velocity should be 6.5 m\/s)&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/02-05-2024-1714655536-flow_hole1_picture2.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;pressure: (target pressure drop 32 Pa, i am getting 36Pa)&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/02-05-2024-1714655734-pressure.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;Do you think i should enable transition model as well (I think its more apt for moving surfaces which ia not my case) to reduce the pressure drop?&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-365215","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - 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