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// This file is part of ff3d - http://www.freefem.org/ff3d
// Copyright (C) 2001, 2002, 2003 Stphane Del Pino
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// This program 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// $Id: VariationalOperatorMuGradUGradV.hpp,v 1.2 2003/09/21 15:44:53 delpinux Exp $
#ifndef VARIATIONAL_OPERATOR_MU_GRADU_GRADV_HPP
#define VARIATIONAL_OPERATOR_MU_GRADU_GRADV_HPP
#include <VariationalBilinearOperator.hpp>
#include <UserFunction.hpp>
/**
* @file VariationalOperatorMuGradUGradV.hpp
* @class VariationalMuGradUGradVOperator
* @author Stephane Del Pino
* @date Thu May 30 22:14:40 2002
*
* @brief \f$ a(u,v) = \int\nabla u\cdot\nabla v\f$
*
*
*/
class VariationalMuGradUGradVOperator
: public VariationalBilinearOperator
{
private:
ReferenceCounting<UserFunction> __mu; /**< viscosity: \f$\mu\f$ */
public:
/**
*
* Access to \f$\mu\f$
*
* @return *__mu
*/
const UserFunction& mu() const
{
return *__mu;
}
/**
* "Multiplies" the operator by a function
*
* @param u the given function
*
* @return the new operator
*/
ReferenceCounting<VariationalBilinearOperator>
operator * (ConstReferenceCounting<UserFunction> u) const
{
VariationalMuGradUGradVOperator* newOperator = new VariationalMuGradUGradVOperator(*this);
(*newOperator).__mu = new MulUserFunction(__mu, u);
return newOperator;
}
/**
* Constructor
*
* @param unknownNumber
* @param testFunctionNumber
* @param mu \f$\mu\f$
*
*/
VariationalMuGradUGradVOperator(const size_t unknownNumber,
const size_t testFunctionNumber,
ReferenceCounting<UserFunction> mu)
: VariationalBilinearOperator(VariationalBilinearOperator::muGradUGradV,
unknownNumber, testFunctionNumber),
__mu(mu)
{
;
}
/**
* Copy constructor
*
* @param V a VariationalMuGradUGradVOperator
*
*/
VariationalMuGradUGradVOperator(const VariationalMuGradUGradVOperator& V)
: VariationalBilinearOperator(V),
__mu(V.__mu)
{
;
}
/**
* Destructor
*
*/
~VariationalMuGradUGradVOperator()
{
;
}
};
#endif // VARIATIONAL_OPERATOR_MU_GRADU_GRADV_HPP
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