{"id":276595,"date":"2023-03-27T12:49:52","date_gmt":"2023-03-27T12:49:52","guid":{"rendered":"\/forum\/forums\/reply\/276595\/"},"modified":"2023-03-27T12:49:52","modified_gmt":"2023-03-27T12:49:52","slug":"276595","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/276595\/","title":{"rendered":"Reply To: Cannot get definitive solution"},"content":{"rendered":"<p>&lt;p&gt;Look at the flow field, you may need to get images at several points in the cycle. They should show why you&#8217;re getting fluctuations. If you&#8217;re not sure post the images and I may be able to tell you where to look.&nbsp;&lt;\/p&gt;&lt;p&gt;Enclosure dimensions are covered in literature, they&#8217;re typically related to chord length and\/or blockage factor. Look in both CFD and wind tunnel references.&nbsp;&lt;\/p&gt;&lt;p&gt;A and B are both valid, but with some comments. For A I&#8217;d probably use 2d. For B a symmetry plane would reduce the cell count but still allow you to look at tip effects.&nbsp;&lt;\/p&gt;&lt;p&gt;There is no &#8220;perfect shape&#8221;. It&#8217;s more a case of understanding why you&#8217;re doing something. Blocks are easy, and work well for aligned aerofoils. The semi-elipse is good for varying angle of attack in one mesh: check the NACA tutorials\/videos.&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-276595","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=\"Look at the flow field, you may need to get images at several points in the cycle. They should show why you&#039;re getting fluctuations. If you&#039;re not sure post the images and I may be able to tell you where to look. 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