{"id":314458,"date":"2023-11-02T03:53:57","date_gmt":"2023-11-02T03:53:57","guid":{"rendered":"\/forum\/forums\/reply\/314458\/"},"modified":"2023-11-02T03:53:57","modified_gmt":"2023-11-02T03:53:57","slug":"314458","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/314458\/","title":{"rendered":"Reply To: Creation of Periodic B.C in ICEM"},"content":{"rendered":"<p>&lt;p&gt;The negative or positive value does not matter. You can use either 0 &nbsp;0 &nbsp;-0.2 &nbsp; &nbsp; &nbsp;or &nbsp; &nbsp; &nbsp;0 &nbsp;0 &nbsp;0.2.&lt;\/p&gt;&lt;p&gt;It just defines a distance when node locations will be linked to be the same values in the directions normal to this vector and matching in vector length distance along the vector. After setting up the periodicity direction in the global settings, you must still link the block vertices. This is shown in the ICEM CFD training. Two lectures slides are shown below. The example shows angular periodicity, but the procedure is the same for linear periodicity:&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/02-11-2023-1698897097-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/02-11-2023-1698897109-mceclip1.png\" \/>&lt;\/p&gt;&lt;p&gt;You will need to design your blocking scheme so that the face structure matches at the periodic faces.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-314458","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"The negative or positive value does not matter. 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