{"id":52057,"date":"2021-02-09T10:18:07","date_gmt":"2021-02-09T10:18:07","guid":{"rendered":"\/forum\/forums\/topic\/time-stepping-convergence-issue-with-a-several-hours-lasting-2-phase-simulation-error-message\/"},"modified":"2021-02-09T10:18:07","modified_gmt":"2021-02-09T10:18:07","slug":"time-stepping-convergence-issue-with-a-several-hours-lasting-2-phase-simulation-error-message","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/time-stepping-convergence-issue-with-a-several-hours-lasting-2-phase-simulation-error-message\/","title":{"rendered":"TIME STEPPING \/ CONVERGENCE ISSUE with a SEVERAL HOURS lasting 2-phase simulation + ERROR MESSAGE"},"content":{"rendered":"
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Hello there,<\/p>\n

I am having severe problems with convergence and my time stepping settings (under "run simulation").<\/p>\n

<\/p>\n<\/p>\n

Case description:<\/strong><\/p>\n

I am doing a transient VOF 2-phase simulation (phase1=nitrogen, phase2=liquid). The special thing about my simulation is that I have a filling process (liquid enters through inlet into tank with v=0.1m\/s) in the beginning for a few seconds (e.g. 10) and then the liquid enters through an interface into a porous zone where it gets soaked, which takes 2-3 hours. The porous zone and the tank are initially completely filled with nitrogen at p=40mbar.<\/p>\n

In the following, you can see my case scheme with its BCs:<\/p>\n

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\nCase.PNG
\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-52057","topic","type-topic","status-closed","hentry","topic-tag-convergence","topic-tag-residuals","topic-tag-time-step","topic-tag-time-stepping-method","topic-tag-transient"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t