libMesh
examples
vector_fe
vector_fe_ex2
laplace_system.h
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// The libMesh Finite Element Library.
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// Copyright (C) 2002-2024 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#ifndef LAPLACE_SYSTEM_H
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#define LAPLACE_SYSTEM_H
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// DiffSystem framework files
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#include "libmesh/fem_system.h"
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#include "libmesh/vector_value.h"
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#include "libmesh/tensor_value.h"
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#include "libmesh/dirichlet_boundaries.h"
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#include "solution_function.h"
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using namespace
libMesh
;
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// FEMSystem, TimeSolver and NewtonSolver will handle most tasks,
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// but we must specify element residuals
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class
LaplaceSystem
:
public
FEMSystem
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{
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public
:
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// Constructor
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LaplaceSystem
(
EquationSystems
& es,
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const
std::string &
name
,
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const
unsigned
int
number);
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// System initialization
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virtual
void
init_data ();
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// Context initialization
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virtual
void
init_context(
DiffContext
& context);
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// Element residual and jacobian calculations
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// Time dependent parts
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virtual
bool
element_time_derivative (
bool
request_jacobian,
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DiffContext
& context);
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// Constraint part
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// virtual bool side_constraint (bool request_jacobian,
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// DiffContext & context);
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protected
:
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// Indices for each variable;
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unsigned
int
u_var
;
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void
init_dirichlet_bcs();
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// Returns the value of a forcing function at point p.
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RealGradient
forcing(
const
Point
& p);
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LaplaceExactSolution
exact_solution
;
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};
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#endif // LAPLACE_SYSTEM_H
libMesh::Quality::name
std::string name(const ElemQuality q)
This function returns a string containing some name for q.
Definition:
elem_quality.C:42
libMesh::EquationSystems
This is the EquationSystems class.
Definition:
equation_systems.h:68
libMesh::DiffContext
This class provides all data required for a physics package (e.g.
Definition:
diff_context.h:55
LaplaceExactSolution
Definition:
laplace_exact_solution.h:25
LaplaceSystem
Definition:
L-shaped.h:11
libMesh::VectorValue< Real >
LaplaceSystem::u_var
unsigned int u_var
Definition:
laplace_system.h:58
libMesh
The libMesh namespace provides an interface to certain functionality in the library.
libMesh::FEMSystem
This class provides a specific system class.
Definition:
fem_system.h:53
LaplaceSystem::exact_solution
LaplaceExactSolution exact_solution
Definition:
laplace_system.h:65
libMesh::Point
A Point defines a location in LIBMESH_DIM dimensional Real space.
Definition:
point.h:39
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