[Dune] Dune Digest, Vol 125, Issue 7

[Jelena Grižić]

Dear all,

my last mail was too big for some mailservers, so I'm sending attachment
only containing relevant information.


Thanks!


Best regards,

Jelena Grižić

2015-11-13 13:09 GMT+01:00 Jelena Grižić <jelena.grizic at gmail.com>:

> Hi Andreas,
>
> file with all requested information is in the attachment. I'm using module
> dune-alugrid.
> I can also share dgf file on Google Disc or Dropbox, if necessarily.
>
>
> Thank you!
>
> Best regards,
>
> Jelena
>
> 2015-11-13 12:00 GMT+01:00 <dune-request at dune-project.org>:
>
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>> Today's Topics:
>>
>>    1. dune-alugrid: Assertion `DetDf > 0' failed (Jelena Gri?i?)
>>    2. Re: dune-alugrid: Assertion `DetDf > 0' failed (Andreas Dedner)
>>
>>
>> ---------- Proslijeđena poruka ----------
>> From: "Jelena Grižić" <jelena.grizic at gmail.com>
>> To: dune at dune-project.org
>> Cc:
>> Date: Thu, 12 Nov 2015 18:11:38 +0100
>> Subject: [Dune] dune-alugrid: Assertion `DetDf > 0' failed
>> Dear all,
>>
>>
>> while constructing mesh from dgf file, I receive message :
>>
>> dune-alugrid/dune/alugrid/3d/mappings_imp.cc:187: Dune::alu3d_ctype
>> Dune::TrilinearMapping::det(const coord_t&): Assertion `DetDf > 0' failed.
>>
>> Could you explain what that exactly means and what could be problem with
>> my mesh?
>>
>> Unfortunately, dgf file is to big (56,7 MB) to be included in mail.
>>
>>
>> Thank you.
>>
>> Best regards,
>>
>> Jelena Grižić
>>
>>
>> ---------- Proslijeđena poruka ----------
>> From: Andreas Dedner <a.s.dedner at warwick.ac.uk>
>> To: <dune at dune-project.org>
>> Cc:
>> Date: Thu, 12 Nov 2015 18:44:49 +0000
>> Subject: Re: [Dune] dune-alugrid: Assertion `DetDf > 0' failed
>> Hi.
>> The determinant in the alugrid TrilinearMapping class where the
>> assertion is triggered, is used to compute for example the integration
>> element or the volume of the cells in the grid. Alugrid assumes a
>> certain orientation of the grid elements (determinant > 0). I would have
>> thought that would be checked during the grid generation process and the
>> elements local vertex numbering changed if necessary but you might have
>> found a bad case here. I would need (at least):
>> 0) which alugrid type are you using, e.g., Cube<3> or Cube<2,3> or...
>> 1) the value of detDf (is it zero or negative)
>> 2) the call stack for the error
>> 3) The class also contains a variable 'a' which describes the mapping
>>    and can be used to figure out which element in your dgf file is
>>    causing the problem
>> 4) If that doesn't work then the dgf file...
>> Andreas
>>
>>
>> On 12/11/15 17:11, Jelena Grižić wrote:
>> > Dear all,
>> >
>> >
>> > while constructing mesh from dgf file, I receive message :
>> >
>> > dune-alugrid/dune/alugrid/3d/mappings_imp.cc:187: Dune::alu3d_ctype
>> > Dune::TrilinearMapping::det(const coord_t&): Assertion `DetDf > 0'
>> failed.
>> >
>> > Could you explain what that exactly means and what could be problem with
>> > my mesh?
>> >
>> > Unfortunately, dgf file is to big (56,7 MB) to be included in mail.
>> >
>> >
>> > Thank you.
>> >
>> > Best regards,
>> >
>> > Jelena Grižić
>> >
>> >
>> > _______________________________________________
>> > Dune mailing list
>> > Dune at dune-project.org
>> > http://lists.dune-project.org/mailman/listinfo/dune
>> >
>>
>>
>>
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>
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