Scratch that. I discovered COMSOL does something very nice that
boosts the quality of its results. If I have a curved boundary on my
geometry, COMSOL will interpolate the associated quadrature on the
cells along that boundary to improve accuracy. When I turn that
feature off, the results are consistent with what I'm getting from
FEniCS.
But the question remains: are there any benchmarks?
-gideon
On Jan 15, 2008, at 9:51 PM, Gideon Simpson wrote:
Has anyone done any benchmarking with dolfin?
I've been comparing some dolfin output to some problems I've
previously done using COMSOL and I have to tell you I'm not crazy
about the results. In particular, I'm interested in linear Stokes
flow problems around objects that arise out of homogenization and I
find that when I compute the domain averages of the variables
( pressure, velocity ), as one does in such problems, the
convergence to a fixed value as the mesh is refined isn't so good.
I've tried both iterative and direct solvers too.
-gideon
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