FourierNoise.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html
 
#pragma once
 
#include "Function.h"
 
class FEProblemBase;
 
class FourierNoise : public Function
{
public:
  static InputParameters validParams();
 
  FourierNoise(const InputParameters & parameters);
 
  using Function::value;
  virtual Real value(Real, const Point & p) const override;
  virtual ADReal value(const ADReal &, const ADPoint & p) const override;
 
protected:
  struct SeriesItem
  {
    RealVectorValue k;
    Real s;
    Real c;
  };
 
  const Real _lambda;
 
  std::vector<SeriesItem> _series;
 
  Real _scale;
 
  FEProblemBase & _fe_problem;
};