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Simulation time causes different images

Posted 15 oct. 2023, 06:32 UTC−4 Electromagnetics, Studies & Solvers Version 5.6 2 Replies

Yuyang Liang
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With all other parameters being the same. The magnetic field component image at the 70ns simulation time is completely different from the magnetic field component image at the 200ns simulation time. Why the 200ns simulation image is not an extension of the 70ns simulation image. Can anyone help me? I would be very grateful.!! https://imgur.com/a/8kDTDfJ

2 Replies Last Post 17 oct. 2023, 10:20 UTC−4
Robert Koslover Certified Consultant
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Posted: 6 months ago 17 oct. 2023, 09:52 UTC−4
Updated: 6 months ago 17 oct. 2023, 10:00 UTC−4

You are probably allowing the model to set the time stepping "automatically." Don't do that. In the longer time case, the model is probably losing all the physics details by taking steps that are too long. Set the time step manually (and put some thought into choosing it) so it will be appropriate to the physical process you are modeling.

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
You are probably allowing the model to set the time stepping "automatically." Don't do that. In the longer time case, the model is probably losing all the physics details by taking steps that are too long. Set the time step manually (and put some thought into choosing it) so it will be appropriate to the physical process you are modeling.
Jeff Hiller COMSOL Employee

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Posted: 6 months ago 17 oct. 2023, 10:20 UTC−4
Updated: 6 months ago 17 oct. 2023, 10:20 UTC−4

The phenomenon that Robert is referring to is described in some detail in this blog post, where you will find more information on the solver settings you can use instead.

Best regards,

Jeff

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Jeff Hiller
The phenomenon that Robert is referring to is described in some detail in [this blog post](https://www.comsol.com/support/knowledgebase/1254), where you will find more information on the solver settings you can use instead. Best regards, Jeff

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