{"id":361535,"date":"2024-04-10T13:25:32","date_gmt":"2024-04-10T13:25:32","guid":{"rendered":"\/forum\/forums\/reply\/361535\/"},"modified":"2024-04-10T13:27:13","modified_gmt":"2024-04-10T13:27:13","slug":"361535","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361535\/","title":{"rendered":"Reply To: NACA 0012 &#8211; 2D simulation"},"content":{"rendered":"<p>&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;Basically for every different angles 0, 3,5,9 everything is just fine with the lift coefficient.&lt;\/p&gt;&lt;p&gt;But with the drag there is a problem, drag coefficients are negative (!) and they have various differences compared to exprimental values. Why only drag have the problem?&lt;\/p&gt;&lt;p&gt;These are my settings: Could you please check them? Thank you!&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/10-04-2024-1712755274-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/10-04-2024-1712755334-mceclip1.png\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/10-04-2024-1712755456-mceclip2.png\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/10-04-2024-1712755512-mceclip3.png\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-361535","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=\"Basically for every different angles 0, 3,5,9 everything is just fine with the lift coefficient.But with the drag there is a problem, drag coefficients are negative (!) and they have various differences compared to exprimental values. Why only drag have the problem?These are my settings: Could you please check them? Thank you!\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361535\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: NACA 0012 \u2013 2D simulation | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Basically for every different angles 0, 3,5,9 everything is just fine with the lift coefficient.But with the drag there is a problem, drag coefficients are negative (!) and they have various differences compared to exprimental values. 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Why only drag have the problem?These are my settings: Could you please check them? 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