Hi,
I attempted to use the CellAvg class from ufl.restriction and got the KeyError stated in the headline. A (hopefully) minimal example that generates the error is given below:
import dolfin as dlf
from ufl.restriction import CellAvg
# Generate mesh
mesh = dlf.UnitSquareMesh(4, 4)
# Function Space
vecFuncSpace = dlf.VectorFunctionSpace(mesh, 'CG', 1)
# Functions
u = dlf.Function(vecFuncSpace)
v = dlf.TestFunction(vecFuncSpace)
# Kinematics
I = dlf.Identity(u.geometric_dimension())
F = I + dlf.grad(u)
J = dlf.det(F)
kappa = dlf.Constant(1e3)
p = kappa*(J - 1.0)
form = CellAvg(p) * dlf.div(v) * dlf.dx
b = dlf.assemble(form) # Error
This code gave me the error:
KeyError: 'FE0_C0_D10_AC'
I am using
In [17]: dlf.__version__
Out[17]: '1.6.0'
I came across this in an attempt to formulate static condensation for an incompressible hyper-elastic material, which I realize has been submitted as an issue here. I also found this, but don't see a way to download the file uploaded by "Kent-Andre Mardal (kent-and)".
