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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Error messages

Posted 2011年5月10日 GMT-4 18:43 Version 4.0a 3 Replies

Roderik Berthelin
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Hello,

I'm doing some simulations to compute the magnetic forces
between two magnets. I'm using the parametric sweep mode
as some dimensions of the magnets are parameters.

However, I often have error messages and I don't know why:

* Error in sweep: The following feature has encountered a problem:
- Feature: Compile Equations: Stationary (sol1/st1)
- Error: Internal error in geometry decomposition

* Error in automatic sequence generation:
Internal error in geometry decomposition

* Java heap space error

For example, I'm varying a parameter between 0 and 10 with a step
of 1 and the simulation for the step 3 doesn't work but all the others
work.

Attached you will find the comsol file used (as it is a symmetrical situation, it is
divided along the plan y0z). There are two parametric sweeps
which are enabled for the variables e (between 0 and 10) and delta_l (between 0 and 0.0065).
When I run the simulations, I get an error message and not all the results.
I'm obliged to do other simulations to get the missing results.

If someone could help me in any way whatsoever, I'd be very grateful!!

Regards,

Jimmy

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3 Replies Last Post 2011年7月27日 GMT-4 05:38
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2011年5月11日 GMT-4 01:34
Hi

I do not have access to my COMSOL right now, but that error message means for me that the meshing process is having some issues with the geometry, it cannot correctly anayse it. I would rather take a look at the detail in the geometry, to many small items, complex geoemtry ?

--
Good luck
Ivar
Hi I do not have access to my COMSOL right now, but that error message means for me that the meshing process is having some issues with the geometry, it cannot correctly anayse it. I would rather take a look at the detail in the geometry, to many small items, complex geoemtry ? -- Good luck Ivar
Roderik Berthelin
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Posted: 1 decade ago 2011年5月13日 GMT-4 12:49
Hi,

Thank you for your answer.
In my model, the geometry is really simple (two small cylinders (one with a hole) in a big cylider).
I put a tetrahedral meshing: normal size with two refinements in order to be accurate enough
but I'm going to try with coarser meshing to see if it changes something.

Sincerely,

julien
Hi, Thank you for your answer. In my model, the geometry is really simple (two small cylinders (one with a hole) in a big cylider). I put a tetrahedral meshing: normal size with two refinements in order to be accurate enough but I'm going to try with coarser meshing to see if it changes something. Sincerely, julien
Anupam Ghosh
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Posted: 1 decade ago 2011年7月27日 GMT-4 05:38
ok
ok

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