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New question #102995 on DOLFIN:
https://answers.launchpad.net/dolfin/+question/102995
I am trying to mark a curved boundary which is a PHYSICAL boundary, but it seems
dolfin does not take the boundary into account.
my curved boundary is just a semi-circle with a radius 0.5 and the center locates at (0, 0)
What I do is below,
class Cboundary(SubDomain):
def inside(self,x,on_boundary):
return on_boundary and (abs(x[0]*x[0]+x[1]*x[1]-0.25)<tol)
bc = DirichletBC(W.sub(0), noslip, Cboundary(), 'pointwise')
Changing the value of tol is not useful as I tried.
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