[CIG-SHORT] RuntimeError: Determinant of Jacobian (1.74667e-08) for cell 0 is smaller than minimum permissible value (1e-06)!

[Matthew Knepley]

On Sun, Mar 17, 2013 at 10:20 AM, <surendra at caltech.edu> wrote:

>
> On Mar 16, 2013, at 8:37 PM, Lucas Abraham Willemsen wrote:
>
>
> RuntimeError: Determinant of Jacobian (1.74667e-08) for cell 0 is smaller
> than minimum permissible value (1e-06)!
>
> This message doesn't really help me a lot. I have no idea why the Jacobian
> is bad, when the mesh elements seem to have such a nice aspect ratio.
>
>
> Try changing your non-dimenionalizing parameters.
>
>      normalizer.wave_period = 0.1*s
>
> Changing the wave period normalizer to 0.1 sec got rid of that error for
> me.  There are plenty of other setting that aren't set properly, though.
>

Yes, we have a check on the absolute volume of the element, so changing the
normalization will get
rid of this error for well-conditioned meshes. Alternatively, we could have
some idea of the "normal"
cell size, but this sounds really fragile.

  Thanks,

     Matt


> --Surendra
>
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-- 
What most experimenters take for granted before they begin their
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-- Norbert Wiener
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