Something slightly peculiar seems to happen with 3d refinement. Refining
a 1 x 1 x 1 Unit Cube 3 times gives largest cell diameter that is
increasing (but smallest cell diameter that is decreasing as expected).
It does not seem to (only) be a bug in hmax()/hmin(), odd convergence
rates are also observed. Any ideas?
Example:
from dolfin import *
mesh = UnitCube(1, 1, 1)
for i in range(3):
mesh = refine(mesh)
print "Refinement level = ", i
print "h_max = ", mesh.hmax()
print "h_min = ", mesh.hmin()
gives:
Refinement level = 0
h_max = 1.65831239518
h_min = 0.866025403784
Refinement level = 1
h_max = 1.47901994577
h_min = 0.433012701892
Refinement level = 2
h_max = 1.7809758561
h_min = 0.216506350946
--
Marie
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