neumannproblem.form

来自「finite element library for mathematic ma」· FORM 代码 · 共 18 行

# Copyright (C) 2006 Anders Logg ([e-mail])
# Licensed under the GNU GPL version 3 or any later version
#
# The bilinear form a(v, U) and linear form L(v) for
# Poisson's equation with Neumann boundary conditions.
#
# Compile this form with FFC: ffc NeumannProblem.form

element = FiniteElement("Vector Lagrange", "triangle", 1)

v = TestFunction(element)
U = TrialFunction(element)
f = Function(element)
g = Function(element)

#a = dot(grad(v), grad(U))*dx
a = dot(v, f)*dx + dot(v, g)*ds