void TestAnyNonZeroNeumannConditionsAndApplyNeumannToMeshBoundary()
{
// Load a 2D square mesh with 1 central non-boundary node
TrianglesMeshReader<2,2> mesh_reader("mesh/test/data/square_4_elements");
TetrahedralMesh<2,2> mesh;
mesh.ConstructFromMeshReader(mesh_reader);
BoundaryConditionsContainer<2,2,1> bcc;
BoundaryConditionsContainer<2,2,2> bcc_2unknowns;
TS_ASSERT_EQUALS(bcc.AnyNonZeroNeumannConditions(), false);
bcc.DefineZeroNeumannOnMeshBoundary(&mesh);
TetrahedralMesh<2,2>::BoundaryElementIterator iter;
iter = mesh.GetBoundaryElementIteratorBegin();
while (iter != mesh.GetBoundaryElementIteratorEnd())
{
TS_ASSERT(bcc.HasNeumannBoundaryCondition(*iter));
double value = bcc.GetNeumannBCValue(*iter, (*iter)->GetNode(0)->GetPoint());
TS_ASSERT_DELTA(value, 0.0, 1e-8);
iter++;
}
TS_ASSERT_EQUALS(bcc.AnyNonZeroNeumannConditions(), false);
iter = mesh.GetBoundaryElementIteratorBegin();
ConstBoundaryCondition<2>* p_boundary_condition2 = new ConstBoundaryCondition<2>(-1);
bcc_2unknowns.AddNeumannBoundaryCondition(*iter, p_boundary_condition2);
TS_ASSERT_EQUALS(bcc_2unknowns.AnyNonZeroNeumannConditions(), true);
}
void TestAddNeumannBoundaryConditions()
{
// Load a 2D square mesh with 1 central non-boundary node
TrianglesMeshReader<2,2> mesh_reader("mesh/test/data/square_4_elements");
TetrahedralMesh<2,2> mesh;
mesh.ConstructFromMeshReader(mesh_reader);
BoundaryConditionsContainer<2,2,2> bcc;
// No BCs yet, so shouldn't validate
TS_ASSERT(!bcc.Validate(&mesh));
// Add some BCs
ConstBoundaryCondition<2> *bc1 = new ConstBoundaryCondition<2>(2.0);
ConstBoundaryCondition<2> *bc2 = new ConstBoundaryCondition<2>(-3.0);
TetrahedralMesh<2,2>::BoundaryElementIterator iter = mesh.GetBoundaryElementIteratorEnd();
iter--;
bcc.AddNeumannBoundaryCondition(*iter, bc1, 0);
bcc.AddNeumannBoundaryCondition(*iter, bc2, 1);
iter--;
bcc.AddNeumannBoundaryCondition(*iter, bc1, 0);
iter--;
bcc.AddNeumannBoundaryCondition(*iter, bc2, 1);
iter = mesh.GetBoundaryElementIteratorEnd();
iter--;
TS_ASSERT_DELTA(bcc.GetNeumannBCValue(*iter, ChastePoint<2>(), 0), 2.0, 1e-9);
TS_ASSERT_DELTA(bcc.GetNeumannBCValue(*iter, ChastePoint<2>(), 1), -3.0, 1e-9);
iter--;
TS_ASSERT_DELTA(bcc.GetNeumannBCValue(*iter, ChastePoint<2>(), 0), 2.0, 1e-9);
TS_ASSERT_DELTA(bcc.GetNeumannBCValue(*iter, ChastePoint<2>(), 1), 0.0, 1e-9);
iter--;
TS_ASSERT_DELTA(bcc.GetNeumannBCValue(*iter, ChastePoint<2>(), 0), 0.0, 1e-9);
TS_ASSERT_DELTA(bcc.GetNeumannBCValue(*iter, ChastePoint<2>(), 1), -3.0, 1e-9);
}