{"id":348667,"date":"2024-02-02T21:18:31","date_gmt":"2024-02-02T21:18:31","guid":{"rendered":"\/forum\/forums\/reply\/348667\/"},"modified":"2024-02-02T21:18:31","modified_gmt":"2024-02-02T21:18:31","slug":"348667","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/348667\/","title":{"rendered":"Reply To: time step size , number of time step and max iteration"},"content":{"rendered":"<p>&lt;p&gt;The time step size will depend on your physics. You want to select the most restrictive time scale that resolves the desired physics of your flow. One example is the convective Courant number, where you&#8217;d want dt &lt; dx * V_flow.&lt;\/p&gt;&lt;p&gt;The number of time step depends on the desired duration of your simulation. Do you want to simulate for T = 10s with a time step size of dt = 0.01s? n = T\/dt = 1000&lt;\/p&gt;&lt;p&gt;The Max iteration is a limit on the number of iterations that you want the solver to take for each time step. In general, if your solution converges intra-time step in less than 20 iterations, this would be considered efficient. Again, this will depend on your overall setup, physics, etc.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-348667","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=\"The time step size will depend on your physics. You want to select the most restrictive time scale that resolves the desired physics of your flow. One example is the convective Courant number, where you&#039;d want dt &lt; dx * V_flow.The number of time step depends on the desired duration of your simulation. Do you\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/348667\/\" \/>\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: time step size , number of time step and max iteration | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"The time step size will depend on your physics. You want to select the most restrictive time scale that resolves the desired physics of your flow. One example is the convective Courant number, where you&#039;d want dt &lt; dx * V_flow.The number of time step depends on the desired duration of your simulation. 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You want to select the most restrictive time scale that resolves the desired physics of your flow. One example is the convective Courant number, where you'd want dt < dx * V_flow.The number of time step depends on the desired duration of your simulation. 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You want to select the most restrictive time scale that resolves the desired physics of your flow. One example is the convective Courant number, where you'd want dt < dx * V_flow.The number of time step depends on the desired duration of your simulation. 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You want to select the most restrictive time scale that resolves the desired physics of your flow. One example is the convective Courant number, where you'd want dt < dx * V_flow.The number of time step depends on the desired duration of your simulation. 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One example is the convective Courant number, where you'd want dt &lt; dx * V_flow.The number of time step depends on the desired duration of your simulation. Do you","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/348667\/","article:published_time":"2024-02-02T21:18:31+00:00","article:modified_time":"2024-02-02T21:18:31+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: time step size , number of time step and max iteration | Ansys Learning Forum","twitter:description":"The time step size will depend on your physics. You want to select the most restrictive time scale that resolves the desired physics of your flow. One example is the convective Courant number, where you'd want dt &lt; dx * V_flow.The number of time step depends on the desired duration of your simulation. 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