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Inconsistent results via setting different start and end time with the same time step
Posted 24 feb 2022, 05:55 GMT-5 Structural & Acoustics, Heat Transfer & Phase Change, Studies & Solvers Version 5.6 2 Replies
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I am solving a time-dependent problem, where I meet an issue related to the convergence. I set six different start and end time with the same time step 0.02ns, for instance, 0 - 10ns, 0 - 20ns, 0 - 30ns, 0 - 40 ns, 0 - 50ns, and 0 - 60ns. However, they give me inconsist results at 10ns, see the figure below. Both Fully coupled and Segregated solvers show the same behaivour. Could anyone give me some tips about this behaviour in COMSOL?
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I'll take a wild guess that perhaps you may be allowing Comsol to automatically adjust the size of your time steps? Try setting your time stepping to "Manual". I've attached a piece of a screenshot to show you an example. But consider posting your .mph file to the forum for more detailed advice.
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Dear Robert,
It helped. Thank you very much!
Best regards, Jian