{"id":40758,"date":"2020-02-07T23:25:05","date_gmt":"2020-02-07T23:25:05","guid":{"rendered":"\/forum\/forums\/topic\/fluent-solver-slows-down-with-time\/"},"modified":"2020-02-07T23:25:05","modified_gmt":"2020-02-07T23:25:05","slug":"fluent-solver-slows-down-with-time","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-solver-slows-down-with-time\/","title":{"rendered":"Fluent solver slows down with time"},"content":{"rendered":"<p>Hello ANSYS community,<\/p>\n<p><\/p>\n<p>I&#8217;ve a problem&nbsp;with my fluent solver slowing down with an increasing number of iterations. I&#8217;m simulating a transient case of a vertical-axis-wind-turbine on my home computer, which has a Intel Xeon E3-1231 and 16gb RAM and ANSYS 19.1 (free student version) installed on a hard drive.<\/p>\n<p><\/p>\n<p>While this setup is probalby not ideal, the simulation starts fast with multiple iterations solved per second, but with increasing number of iterations the simulation then slows down. Last time I checked (around 10000 iterations in total), one iteration took up to 10 seconds to solve. My best guess is an issue with the memory (maybe?) but the task-manager actually shows that plenty of RAM should be available.<\/p>\n<p><\/p>\n<p>A work-around is stopping the simulation halfway through and restarting ANSYS,&nbsp;then it runs fast again. Sadly this is pretty time-consuming since FLUENT is, once the iterations slowed down, very &#8220;sensitive&#8221; to button-pressing i.e. freezes for a few seconds\/responds slowly to commands. I hope someone has a fix for my (sometimes) lazy Fluent <img decoding=\"async\" class=\"emoticon\" src=\"\/content\/images\/emoticons\/big-smile-emoticon-for-facebook.png\" alt=\"\"><\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>Regards Jan&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-40758","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=\"Hello ANSYS community, I&#039;ve a problem with my fluent solver slowing down with an increasing number of iterations. I&#039;m simulating a transient case of a vertical-axis-wind-turbine on my home computer, which has a Intel Xeon E3-1231 and 16gb RAM and ANSYS 19.1 (free student version) installed on a hard drive. 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