ffc team mailing list archive

["Johan Hoffman" <jhoffman@xxxxxxxxxxx>]

Anders,

Is the mean() function in FFC not supported for vector functions? Or am I
missing something?

/Johan




na41>ffc Poisson.form
This is FFC, the FEniCS Form Compiler, version 0.2.4.
For further information, go to http://www/fenics.org/ffc/.
Parsing Poisson.form
Output written to Poisson.py

Compiling form: (dXa0/dx0)(dXa1/dx0) | ((d/dXa0)vi0)*((d/dXa1)vi1)*dX +
(dXa0/dx 1)(dXa1/dx1) | ((d/dXa0)vi0)*((d/dXa1)vi1)*dX
Finite element of test space:  Lagrange finite element of degree 1 on a
Triangle  with 1 components
Finite element of trial space: Lagrange finite element of degree 1 on a
Triangle  with 1 components
Compiling tensor representation for interior
Hard signatures match for terms 0 and 1, factorizing
Computing reference tensor, this may take some time...
................................................................................
Reference tensor computed in 0.00739 seconds.
Compiling tensor representation for boundary
Hard signatures match for terms 0 and 1, factorizing

Compiling form: w0_a0 | vi0*va0*dX
Finite element of test space:  Lagrange finite element of degree 1 on a
Triangle  with 1 components
Finite elements for functions: [Lagrange finite element of degree 1 on a
Triangl e with 1 components]
Compiling tensor representation for interior
Computing reference tensor, this may take some time...
................................................................................
Reference tensor computed in 0.012 seconds.
Compiling tensor representation for boundary

Generating output for DOLFIN
Output written to Poisson.h
na41>cd
na41>cd local/dolfin/src/modules/navierstokes/dolfin/
na41>ffc NSEContinuity.form
This is FFC, the FEniCS Form Compiler, version 0.2.4.
For further information, go to http://www/fenics.org/ffc/.
Parsing NSEContinuity.form
Output written to NSEContinuity.py

*** Error at w0_a69 | va69[a7]
*** Mean values are only supported for Functions.









# Copyright (c) 2005 Johan Hoffman (hoffman@xxxxxxxxxxxx)
# Licensed under the GNU GPL Version 2
#
# The contiuity equation for the incompressible
# Navier-Stokes equations using cG(1)cG(1)
#
# Compile this form with FFC: ffc NSEContinuity.form.

name = "NSEContinuity"
#scalar = FiniteElement("Lagrange", "triangle", 1)
#vector = FiniteElement("Vector Lagrange", "triangle", 1)
#constant_scalar = FiniteElement("Discontinuous Lagrange", "triangle", 0)
#constant_vector = FiniteElement("Discontinuous vector Lagrange",
"triangle", 0)
scalar = FiniteElement("Lagrange", "tetrahedron", 1)
vector = FiniteElement("Vector Lagrange", "tetrahedron", 1)
#constant_vector = FiniteElement("Discontinuous vector Lagrange",
"tetrahedron", 0)
constant_scalar = FiniteElement("Discontinuous Lagrange", "tetrahedron", 0)

q            = BasisFunction(scalar)
p            = BasisFunction(scalar)
#um           = Function(constant_vector)
uc           = Function(vector)
f            = Function(vector)

delta1       = Function(constant_scalar)        # stabilization

i0 = Index()
i1 = Index()
i2 = Index()

a = delta1*dot(grad(q), grad(p))*dx;
L = delta1*dot(grad(q), f)*dx - q*uc[i0].dx(i0)*dx -
delta1*q.dx(i0)*mean(uc[i1])*uc[i0].dx(i1)*dx
#L = delta1*dot(grad(q), f)*dx - q*uc[i0].dx(i0)*dx -
delta1*q.dx(i0)*um[i1]*uc[i0].dx(i1)*dx

#a = delta1*q.dx(i0)*p.dx(i0)*dx
#L = delta1*q.dx(i0)*f[i0]*dx - delta1*q.dx(i0)*uc[i1]*uc[i0].dx(i1)*dx -
q*uc[i0].dx(i0)*dx