[Getdp] Non vanishing boundary term after integration by parts

RAGHURAM T.R. 121704004 at smail.iitpkd.ac.in
Thu Apr 12 06:50:44 CEST 2018


Dear Christophe,

Thank you so much. I was assuming these terms to be zero and thus I was
getting my simulation results incorrect. Now when I included these terms as
you mentioned, I am getting it right. Thank you.

Regards,
Raghu

On Wed, Apr 11, 2018 at 12:12 PM, Christophe Geuzaine <geuzaine at gmail.com>
wrote:

>
>
> > On 1 Apr 2018, at 16:49, RAGHURAM T.R. <121704004 at smail.iitpkd.ac.in>
> wrote:
> >
> > Dear getDP users,
> >
> > Could you please tell me how to specify the boundary terms that are not
> vanishing after integration by parts in the .pro file?
> >
> > ie., in integral (u dv) = u v - integral ( v du)
> > How to specify u v (without the integrals) in .pro file?
> >
>
> These terms are actually integrated, on the boundary. (Your notation above
> is for the particular case of a 1D segment, whose boundary are points.) You
> would thus treat such terms with a classical integral term in the
> formulation, but on the boundary. The Jacobian should be "Sur" for these
> terms, and the boundary should be included in the support of the basis
> functions.
>
>
> > Thanks in advance.
> >
> > Regards,
> > Raghu
> > _______________________________________________
> > getdp mailing list
> > getdp at onelab.info
> > http://onelab.info/mailman/listinfo/getdp
>
>
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