{"id":394183,"date":"2024-11-19T07:58:12","date_gmt":"2024-11-19T07:58:12","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-22r2-on-hpc-slows-down-by-time\/"},"modified":"2024-11-19T07:58:12","modified_gmt":"2024-11-19T07:58:12","slug":"fluent-22r2-on-hpc-slows-down-by-time","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-22r2-on-hpc-slows-down-by-time\/","title":{"rendered":"Fluent 22R2 on HPC slows down by time"},"content":{"rendered":"<p>&lt;p&gt;I am trying to solve a 2D Transient Vertical Wind Turbine model using Dynamic Mesh with 80k nodes in total. Dt = 0.001s T=13 s, residuals are set to 1e-5 with 300 iterations max, Aspect ratio is 3 max, skewness is lower than 0.7. HPC Has 64 CPU, 1TB RAM. I also tried another machine with 128 CPU but that did not help.&nbsp;&lt;\/p&gt;&lt;p&gt;At first, all CPU&#8217;s available are seen to be under load. Several iterations are done in a second. But as iterations go, time required to solve each iteration goes significantly high. At this point the iterations are only 17% done and it takes ~15 seconds to solve each iteration and it will increase. Is there a solution other than constantly restarting the solution?&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-394183","topic","type-topic","status-publish","hentry","topic-tag-ansys-hpc-2","topic-tag-dynamic-mesh","topic-tag-error","topic-tag-fluent","topic-tag-transient"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I am trying to solve a 2D Transient Vertical Wind Turbine model using Dynamic Mesh with 80k nodes in total. Dt = 0.001s T=13 s, residuals are set to 1e-5 with 300 iterations max, Aspect ratio is 3 max, skewness is lower than 0.7. HPC Has 64 CPU, 1TB RAM. 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