{"id":343641,"date":"2024-01-08T13:45:09","date_gmt":"2024-01-08T13:45:09","guid":{"rendered":"\/forum\/forums\/topic\/custom-implicit-convergence-criteria\/"},"modified":"2024-01-08T13:45:09","modified_gmt":"2024-01-08T13:45:09","slug":"custom-implicit-convergence-criteria","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/custom-implicit-convergence-criteria\/","title":{"rendered":"Custom Implicit Convergence Criteria"},"content":{"rendered":"<p>Dear all,<\/p>\n<p>I am working on cardiac simulations and I have implemented a subroutine which couples a custom 0D CV model to an FEM model of the heart. The segregated coupling is centered around minimising a residual function.&nbsp;<\/p>\n<p>I would like for the implicit solution to move to the next timestep once the coupling residuals have reached a certain threshold in addition to the standard displacement and energy residuals converging.<\/p>\n<p>Currently, I am forcing convergence after a fixed amount of iterations. This produces reasonable convergence, however it&#8217;s quite inefficient and the degree of convergence varies during the cardiac cycle.&nbsp;<\/p>\n<p>Is there any way to create a custom convergence criterion, or control solver convergence outside of the keyword *CONTROL_IMPLICIT_SOLUTION?<\/p>\n<p>Many Thanks&nbsp; &nbsp; &nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-343641","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=\"Dear all,I am working on cardiac simulations and I have implemented a subroutine which couples a custom 0D CV model to an FEM model of the heart. The segregated coupling is centered around minimising a residual function. 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