{"id":430450,"date":"2025-04-30T13:23:32","date_gmt":"2025-04-30T13:23:32","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbogrid-periodic-interface-specification\/"},"modified":"2025-04-30T13:23:32","modified_gmt":"2025-04-30T13:23:32","slug":"turbogrid-periodic-interface-specification","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbogrid-periodic-interface-specification\/","title":{"rendered":"TurboGrid Periodic Interface Specification"},"content":{"rendered":"<p>&lt;p&gt;From my understanding, the creation of periodic surfaces in TurboGrid only depends on the shape of the associated main blade&#8217;s high and\/or low surfaces (&#8220;Periodic And Passage Interface Surface Method = Blade Extents&#8221;). Although this typically doesn&#8217;t result in any issues, it prevents the user from adjusting\/defining the periodic interfaces. If this is the case it means that the &#8220;Periodic Surface Bias&#8221; CCL setting and the &#8220;Low Periodic&#8221; &amp; &#8220;High Periodic&#8221; objects in the geometry tab are completely ignored.&lt;br&gt;&lt;br&gt;I have a unique problem which requires absolute control of the shape of the periodic surface but I&#8217;m struggling to see if it is at all possible since the user guide is quite lacking in this regard. I see several CCL settings which might allow me to manually define the periodic surface but there is no information online about them. Would someone be able to help me?&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-430450","topic","type-topic","status-publish","hentry","topic-tag-periodic","topic-tag-turbogrid"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"From my understanding, the creation of periodic surfaces in TurboGrid only depends on the shape of the associated main blade&#039;s high and\/or low surfaces (&quot;Periodic And Passage Interface Surface Method = Blade Extents&quot;). Although this typically doesn&#039;t result in any issues, it prevents the user from adjusting\/defining the periodic interfaces. 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