Diff of /inst/example/NavierStokes/PressureUpdate.ufl [000000] .. [d03d99]  Maximize  Restore

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+# Copyright (C) 2010 Anders Logg
+#
+# This file is part of DOLFIN.
+#
+# DOLFIN is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DOLFIN is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with DOLFIN. If not, see <http://www.gnu.org/licenses/>.
+#
+# First added:  2010-08-30
+# Last changed: 2010-09-01
+#
+# The bilinear form a(u, v) and linear form L(v) for the pressure
+# update step in Chorin's method for the incompressible Navier-Stokes
+# equations.
+#
+# Compile this form with FFC: ffc -l dolfin PressureUpdate.ufl.
+
+# Define function spaces (P2-P1)
+V = VectorElement("CG", triangle, 2)
+Q = FiniteElement("CG", triangle, 1)
+
+# Define trial and test functions
+p = TrialFunction(Q)
+q = TestFunction(Q)
+
+# Define coefficients
+k  = Constant(triangle)
+u1 = Coefficient(V)
+
+# Define bilinear and linear forms
+a = inner(grad(p), grad(q))*dx
+L = -(1/k)*div(u1)*q*dx

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