{"id":288602,"date":"2023-06-13T20:39:47","date_gmt":"2023-06-13T20:39:47","guid":{"rendered":"\/forum\/forums\/topic\/residuals-not-falling-in-ansys-fluent-transient-simulation\/"},"modified":"2023-06-13T20:39:47","modified_gmt":"2023-06-13T20:39:47","slug":"residuals-not-falling-in-ansys-fluent-transient-simulation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/residuals-not-falling-in-ansys-fluent-transient-simulation\/","title":{"rendered":"Residuals not falling in ansys fluent (transient simulation)"},"content":{"rendered":"<p><img decoding=\"async\" title=\"Residual monitors \" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/06\/13-06-2023-1686687873-0888F28A-8203-4019-97A8-C63B7D3F9BA5.jpeg\" alt=\"\"><br \/>The above photo shows residual values for a transient simulation. I am confused as to why the continuity residuals are not falling . This is an enclosed box containing battery cells with time dependent heat generation and natural convection. There&#8217;s an additional heater whose source values are modeled with a udf using heating table values. The step size for each Time step is 1 second. The mesh quality parameters are 0.55 max skewness and minimum orthogonal quality equal to 0.3. I am unsure why the continuity solution is not converging, I am using K omega sst viscous model. Theres no fluid entering or leaving the box and the gaps for the fluid are in millimeters.Can someone help me as to how to get this solution to converge?<\/p>\n","protected":false},"template":"","class_list":["post-288602","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=\"The above photo shows residual values for a transient simulation. I am confused as to why the continuity residuals are not falling . This is an enclosed box containing battery cells with time dependent heat generation and natural convection. There&#039;s an additional heater whose source values are modeled with a udf using heating table values.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/residuals-not-falling-in-ansys-fluent-transient-simulation\/\" \/>\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=\"Residuals not falling in ansys fluent (transient simulation) | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"The above photo shows residual values for a transient simulation. I am confused as to why the continuity residuals are not falling . This is an enclosed box containing battery cells with time dependent heat generation and natural convection. There&#039;s an additional heater whose source values are modeled with a udf using heating table values.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/residuals-not-falling-in-ansys-fluent-transient-simulation\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/06\/13-06-2023-1686687873-0888F28A-8203-4019-97A8-C63B7D3F9BA5.jpeg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/06\/13-06-2023-1686687873-0888F28A-8203-4019-97A8-C63B7D3F9BA5.jpeg\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-06-13T20:39:47+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-06-13T20:39:47+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Residuals not falling in ansys fluent (transient simulation) | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"The above photo shows residual values for a transient simulation. I am confused as to why the continuity residuals are not falling . This is an enclosed box containing battery cells with time dependent heat generation and natural convection. 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