exact_solution.cpp

/******************************************************************************
 * Copyright (C) Siarhei Uzunbajakau, 2023.
 *
 * This program is free software. You can use, modify, and redistribute it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 or (at your option) any later version.
 * This program is distributed without any warranty.
 *
 * Refer to COPYING.LESSER for more details.
 ******************************************************************************/
 
#include "exact_solution.hpp"
#include <cmath>
 
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
 
using namespace dealii;
using namespace std;
 
template<>
double
ExactSolutionPLS_PHI<2>::value(const Point<2>& r, unsigned int component) const
{
  return (cos(k * r[0]) + cos(k * r[1]));
}
 
template<>
Tensor<1, 2>
ExactSolutionPLS_PHI<2>::gradient(const Point<2>& r,
                                  unsigned int component) const
{
  Tensor<1, 2> p;
 
  p[0] = -k * sin(k * r[0]);
  p[1] = -k * sin(k * r[1]);
 
  return p;
}
 
template<>
double
ExactSolutionPLS_PHI<3>::value(const Point<3>& r, unsigned int componet) const
{
  return (cos(k * r[0]) + cos(k * r[1]) + cos(k * r[2]));
}
 
template<>
Tensor<1, 3>
ExactSolutionPLS_PHI<3>::gradient(const Point<3>& r,
                                  unsigned int component) const
{
  Tensor<1, 3> p;
 
  p[0] = -k * sin(k * r[0]);
  p[1] = -k * sin(k * r[1]);
  p[2] = -k * sin(k * r[2]);
 
  return p;
}
 
#pragma GCC diagnostic pop