DG PeriodicBoundary

Asked by Miro on 2013-02-21

Hi, I tried to make DG work in periodic domain following the code in demo/undocumented/periodic.
The program crashes when constructing the function space. Can someone point out, what I am doing
wrong? I am running trunk version of dolfin. Thanks.

from dolfin import *

mesh = UnitSquareMesh(4,4)

class PeriodicBoundary(SubDomain):

    def inside(self, x, on_boundary):
        return bool(x[0] < DOLFIN_EPS and x[0] > -DOLFIN_EPS and on_boundary)

    def map(self, x, y):
        y[0] = x[0] - 1.0
        y[1] = x[1]

pbc = PeriodicBoundary()

V = FunctionSpace(mesh,'DG',1,constrained_domain=pbc) #<----segmentation fault

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Garth Wells (garth-wells) said : #1

It doesn't segfault for me, but it does report an error.

Garth Wells (garth-wells) said : #2

Note that DG methods are not supported with periodic bcs - integration on periodic facets is not in place.

Miro (miroslav-kuchta) said : #3

Thanks Garth for reply, are there plans to add support for periodic bcs and DG?

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