{"id":298439,"date":"2023-08-07T06:11:47","date_gmt":"2023-08-07T06:11:47","guid":{"rendered":"\/forum\/forums\/topic\/error-a5-optimization-of-a-nozzle-by-using-multiphase-model-and-doe-2-d\/"},"modified":"2023-08-10T12:53:14","modified_gmt":"2023-08-10T12:53:14","slug":"error-a5-optimization-of-a-nozzle-by-using-multiphase-model-and-doe-2-d","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/error-a5-optimization-of-a-nozzle-by-using-multiphase-model-and-doe-2-d\/","title":{"rendered":"Error A5, Optimization of a Nozzle by Using Multiphase Model and DoE (2-D)"},"content":{"rendered":"<p>I&#8217;m trying to use design of experiments (DoE) to optimize dimensions of a nozzle based on maximizing the inlet mass flow with constant inlet pressure. Multiphase is based on air and liquid water where water enters from the inlet and the air is the medium. I have achived this type of enviorenment by patching and setting the volumetric fraction of the water as 0 in the interior, such that water enters to the air medium and the volumetric fraction change in the water in the medium can be observed. The analysis runs flawlessly however when I create design points (DP&#8217;s) and and update the solution for each in DoE, updates fail. I recieve the error association A5, floating point exception. Here is the list of things I have done so far:<\/p>\n<ul>\n<li>Set a couple failed design points as current and checked geometry and mesh, no problems here.<\/li>\n<li>Set the analysis from transient to steady, no changes.<\/li>\n<li>Initialized the analysis standard and hybrid as well, it still fails to update the DP&#8217;s. Though, I can solve it manually.<\/li>\n<li>Run the analysis manually for a couple failed DP&#8217;s, it runs and prints the results. <span style=\"text-decoration: underline\">But when I don&#8217;t patch, floating point exception fail occurs.<\/span><\/li>\n<\/ul>\n<p>My strong guess is DoE does not patch automatically. For analysis to make sense and run without an error, patch is needed. Therefore, my questions are:<\/p>\n<ol>\n<li>Is there a way that DoE patches while updating DP&#8217;s?<\/li>\n<li>If not, is it possible to do this analysis without patching, so that it remains multiphase?<\/li>\n<\/ol>\n<p>Regards,<\/p>\n<p>Babacan<\/p>\n","protected":false},"template":"","class_list":["post-298439","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I&#039;m trying to use design of experiments (DoE) to optimize dimensions of a nozzle based on maximizing the inlet mass flow with constant inlet pressure. Multiphase is based on air and liquid water where water enters from the inlet and the air is the medium. 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